use warnings;
use strict;
+use POSIX;
use Data::Dumper;
use Digest::SHA;
+use Socket qw(AF_INET6 inet_ntop inet_pton);
use PVE::INotify;
+use PVE::Exception qw(raise raise_param_exc);
+use PVE::JSONSchema qw(register_standard_option get_standard_option);
use PVE::Cluster;
use PVE::ProcFSTools;
-use PVE::Tools;
+use PVE::Tools qw($IPV4RE $IPV6RE);
+use PVE::Network;
+use PVE::SafeSyslog;
use File::Basename;
use File::Path;
use IO::File;
use Net::IP;
-use PVE::Tools qw(run_command lock_file);
+use PVE::Tools qw(run_command lock_file dir_glob_foreach);
use Encode;
+use Storable qw(dclone);
-# dynamically include PVE::QemuServer and PVE::OpenVZ
+my $hostfw_conf_filename = "/etc/pve/local/host.fw";
+my $pvefw_conf_dir = "/etc/pve/firewall";
+my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
+
+# dynamically include PVE::QemuServer and PVE::LXC
# to avoid dependency problems
my $have_qemu_server;
eval {
require PVE::QemuServer;
+ require PVE::QemuConfig;
$have_qemu_server = 1;
};
-my $have_pve_manager;
+my $have_lxc;
eval {
- require PVE::OpenVZ;
- $have_pve_manager = 1;
+ require PVE::LXC;
+ $have_lxc = 1;
};
-use Data::Dumper;
+
+my $pve_fw_status_dir = "/var/lib/pve-firewall";
+
+mkdir $pve_fw_status_dir; # make sure this exists
+
+my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
+my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
+our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
+
+my $max_alias_name_length = 64;
+my $max_ipset_name_length = 64;
+my $max_group_name_length = 18;
+
+my $PROTOCOLS_WITH_PORTS = {
+ udp => 1, 17 => 1,
+ udplite => 1, 136 => 1,
+ tcp => 1, 6 => 1,
+ dccp => 1, 33 => 1,
+ sctp => 1, 132 => 1,
+};
+
+PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
+sub pve_verify_ip_or_cidr {
+ my ($cidr, $noerr) = @_;
+
+ if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
+ return $cidr if Net::IP->new($cidr);
+ return undef if $noerr;
+ die Net::IP::Error() . "\n";
+ }
+ return undef if $noerr;
+ die "value does not look like a valid IP address or CIDR network\n";
+}
+
+PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
+sub pve_verify_ip_or_cidr_or_alias {
+ my ($cidr, $noerr) = @_;
+
+ return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
+
+ return pve_verify_ip_or_cidr($cidr, $noerr);
+}
+
+PVE::JSONSchema::register_standard_option('ipset-name', {
+ description => "IP set name.",
+ type => 'string',
+ pattern => $ipset_name_pattern,
+ minLength => 2,
+ maxLength => $max_ipset_name_length,
+});
+
+PVE::JSONSchema::register_standard_option('pve-fw-alias', {
+ description => "Alias name.",
+ type => 'string',
+ pattern => $ip_alias_pattern,
+ minLength => 2,
+ maxLength => $max_alias_name_length,
+});
+
+PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
+ description => "Log level.",
+ type => 'string',
+ enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
+ optional => 1,
+});
+
+PVE::JSONSchema::register_standard_option('pve-security-group-name', {
+ description => "Security Group name.",
+ type => 'string',
+ pattern => $security_group_name_pattern,
+ minLength => 2,
+ maxLength => $max_group_name_length,
+});
+
+my $feature_ipset_nomatch = 0;
+eval {
+ my (undef, undef, $release) = POSIX::uname();
+ if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
+ my ($major, $minor) = ($1, $2);
+ $feature_ipset_nomatch = 1 if ($major > 3) ||
+ ($major == 3 && $minor >= 7);
+ }
+
+};
my $nodename = PVE::INotify::nodename();
my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
-my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
-my $default_log_level = 'info';
+my $default_log_level = 'nolog'; # avoid logs by default
my $log_level_hash = {
debug => 7,
emerg => 0,
};
+# %rule
+#
+# name => optional
+# enable => [0|1]
+# action =>
+# proto =>
+# sport => port[,port[,port]].. or port:port
+# dport => port[,port[,port]].. or port:port
+# log => optional, loglevel
+# logmsg => optional, logmsg - overwrites default
+# iface_in => incomin interface
+# iface_out => outgoing interface
+# match => optional, overwrites generation of match
+# target => optional, overwrites action
+
+# we need to overwrite some macros for ipv6
+my $pve_ipv6fw_macros = {
+ 'Ping' => [
+ { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
+ ],
+ 'NeighborDiscovery' => [
+ "IPv6 neighbor solicitation, neighbor and router advertisement",
+ { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
+ { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
+ { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
+ { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
+ ],
+ 'DHCPv6' => [
+ "DHCPv6 traffic",
+ { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
+ ],
+ 'Trcrt' => [
+ { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
+ { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
+ ],
+ };
+
# imported/converted from: /usr/share/shorewall/macro.*
my $pve_fw_macros = {
'Amanda' => [
+ "Amanda Backup",
{ action => 'PARAM', proto => 'udp', dport => '10080' },
{ action => 'PARAM', proto => 'tcp', dport => '10080' },
],
'Auth' => [
+ "Auth (identd) traffic",
{ action => 'PARAM', proto => 'tcp', dport => '113' },
],
'BGP' => [
+ "Border Gateway Protocol traffic",
{ action => 'PARAM', proto => 'tcp', dport => '179' },
],
'BitTorrent' => [
+ "BitTorrent traffic for BitTorrent 3.1 and earlier",
{ action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
{ action => 'PARAM', proto => 'udp', dport => '6881' },
],
'BitTorrent32' => [
+ "BitTorrent traffic for BitTorrent 3.2 and later",
{ action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
{ action => 'PARAM', proto => 'udp', dport => '6881' },
],
+ 'Ceph' => [
+ "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
+ { action => 'PARAM', proto => 'tcp', dport => '6789' },
+ { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
+ ],
'CVS' => [
+ "Concurrent Versions System pserver traffic",
{ action => 'PARAM', proto => 'tcp', dport => '2401' },
],
'Citrix' => [
+ "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
{ action => 'PARAM', proto => 'tcp', dport => '1494' },
{ action => 'PARAM', proto => 'udp', dport => '1604' },
{ action => 'PARAM', proto => 'tcp', dport => '2598' },
],
'DAAP' => [
+ "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
{ action => 'PARAM', proto => 'tcp', dport => '3689' },
{ action => 'PARAM', proto => 'udp', dport => '3689' },
],
'DCC' => [
+ "Distributed Checksum Clearinghouse spam filtering mechanism",
{ action => 'PARAM', proto => 'tcp', dport => '6277' },
],
'DHCPfwd' => [
+ "Forwarded DHCP traffic",
{ action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
],
'DNS' => [
+ "Domain Name System traffic (upd and tcp)",
{ action => 'PARAM', proto => 'udp', dport => '53' },
{ action => 'PARAM', proto => 'tcp', dport => '53' },
],
'Distcc' => [
+ "Distributed Compiler service",
{ action => 'PARAM', proto => 'tcp', dport => '3632' },
],
- 'Edonkey' => [
- { action => 'PARAM', proto => 'tcp', dport => '4662' },
- { action => 'PARAM', proto => 'udp', dport => '4665' },
- ],
'FTP' => [
+ "File Transfer Protocol",
{ action => 'PARAM', proto => 'tcp', dport => '21' },
],
'Finger' => [
+ "Finger protocol (RFC 742)",
{ action => 'PARAM', proto => 'tcp', dport => '79' },
],
'GNUnet' => [
+ "GNUnet secure peer-to-peer networking traffic",
{ action => 'PARAM', proto => 'tcp', dport => '2086' },
{ action => 'PARAM', proto => 'udp', dport => '2086' },
{ action => 'PARAM', proto => 'tcp', dport => '1080' },
{ action => 'PARAM', proto => 'udp', dport => '1080' },
],
'GRE' => [
+ "Generic Routing Encapsulation tunneling protocol",
{ action => 'PARAM', proto => '47' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
],
'Git' => [
+ "Git distributed revision control traffic",
{ action => 'PARAM', proto => 'tcp', dport => '9418' },
],
- 'Gnutella' => [
- { action => 'PARAM', proto => 'tcp', dport => '6346' },
- { action => 'PARAM', proto => 'udp', dport => '6346' },
- ],
'HKP' => [
+ "OpenPGP HTTP keyserver protocol traffic",
{ action => 'PARAM', proto => 'tcp', dport => '11371' },
],
'HTTP' => [
+ "Hypertext Transfer Protocol (WWW)",
{ action => 'PARAM', proto => 'tcp', dport => '80' },
],
'HTTPS' => [
+ "Hypertext Transfer Protocol (WWW) over SSL",
{ action => 'PARAM', proto => 'tcp', dport => '443' },
],
'ICPV2' => [
+ "Internet Cache Protocol V2 (Squid) traffic",
{ action => 'PARAM', proto => 'udp', dport => '3130' },
],
'ICQ' => [
+ "AOL Instant Messenger traffic",
{ action => 'PARAM', proto => 'tcp', dport => '5190' },
],
'IMAP' => [
+ "Internet Message Access Protocol",
{ action => 'PARAM', proto => 'tcp', dport => '143' },
],
'IMAPS' => [
+ "Internet Message Access Protocol over SSL",
{ action => 'PARAM', proto => 'tcp', dport => '993' },
],
'IPIP' => [
+ "IPIP capsulation traffic",
{ action => 'PARAM', proto => '94' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
- ],
- 'IPP' => [
- { action => 'PARAM', proto => 'tcp', dport => '631' },
- ],
- 'IPPbrd' => [
- { action => 'PARAM', proto => 'udp', dport => '631' },
- ],
- 'IPPserver' => [
- { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
],
'IPsec' => [
+ "IPsec traffic",
{ action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
{ action => 'PARAM', proto => '50' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
],
'IPsecah' => [
+ "IPsec authentication (AH) traffic",
{ action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
{ action => 'PARAM', proto => '51' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
],
'IPsecnat' => [
+ "IPsec traffic and Nat-Traversal",
{ action => 'PARAM', proto => 'udp', dport => '500' },
{ action => 'PARAM', proto => 'udp', dport => '4500' },
{ action => 'PARAM', proto => '50' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
],
'IRC' => [
+ "Internet Relay Chat traffic",
{ action => 'PARAM', proto => 'tcp', dport => '6667' },
],
- 'JabberPlain' => [
- { action => 'PARAM', proto => 'tcp', dport => '5222' },
- ],
- 'JabberSecure' => [
- { action => 'PARAM', proto => 'tcp', dport => '5223' },
- ],
- 'Jabberd' => [
- { action => 'PARAM', proto => 'tcp', dport => '5269' },
- ],
'Jetdirect' => [
+ "HP Jetdirect printing",
{ action => 'PARAM', proto => 'tcp', dport => '9100' },
],
'L2TP' => [
+ "Layer 2 Tunneling Protocol traffic",
{ action => 'PARAM', proto => 'udp', dport => '1701' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
],
'LDAP' => [
+ "Lightweight Directory Access Protocol traffic",
{ action => 'PARAM', proto => 'tcp', dport => '389' },
],
'LDAPS' => [
+ "Secure Lightweight Directory Access Protocol traffic",
{ action => 'PARAM', proto => 'tcp', dport => '636' },
],
'MSNP' => [
+ "Microsoft Notification Protocol",
{ action => 'PARAM', proto => 'tcp', dport => '1863' },
],
'MSSQL' => [
+ "Microsoft SQL Server",
{ action => 'PARAM', proto => 'tcp', dport => '1433' },
],
'Mail' => [
+ "Mail traffic (SMTP, SMTPS, Submission)",
{ action => 'PARAM', proto => 'tcp', dport => '25' },
{ action => 'PARAM', proto => 'tcp', dport => '465' },
{ action => 'PARAM', proto => 'tcp', dport => '587' },
],
+ 'MDNS' => [
+ "Multicast DNS",
+ { action => 'PARAM', proto => 'udp', dport => '5353' },
+ ],
'Munin' => [
+ "Munin networked resource monitoring traffic",
{ action => 'PARAM', proto => 'tcp', dport => '4949' },
],
'MySQL' => [
+ "MySQL server",
{ action => 'PARAM', proto => 'tcp', dport => '3306' },
],
'NNTP' => [
+ "NNTP traffic (Usenet).",
{ action => 'PARAM', proto => 'tcp', dport => '119' },
],
'NNTPS' => [
+ "Encrypted NNTP traffic (Usenet)",
{ action => 'PARAM', proto => 'tcp', dport => '563' },
],
'NTP' => [
+ "Network Time Protocol (ntpd)",
{ action => 'PARAM', proto => 'udp', dport => '123' },
],
- 'NTPbi' => [
- { action => 'PARAM', proto => 'udp', dport => '123' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
- ],
- 'NTPbrd' => [
- { action => 'PARAM', proto => 'udp', dport => '123' },
- { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
- ],
'OSPF' => [
+ "OSPF multicast traffic",
{ action => 'PARAM', proto => '89' },
],
'OpenVPN' => [
+ "OpenVPN traffic",
{ action => 'PARAM', proto => 'udp', dport => '1194' },
],
'PCA' => [
+ "Symantec PCAnywere (tm)",
{ action => 'PARAM', proto => 'udp', dport => '5632' },
{ action => 'PARAM', proto => 'tcp', dport => '5631' },
],
'POP3' => [
+ "POP3 traffic",
{ action => 'PARAM', proto => 'tcp', dport => '110' },
],
'POP3S' => [
+ "Encrypted POP3 traffic",
{ action => 'PARAM', proto => 'tcp', dport => '995' },
],
'PPtP' => [
+ "Point-to-Point Tunneling Protocol",
{ action => 'PARAM', proto => '47' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
{ action => 'PARAM', proto => 'tcp', dport => '1723' },
],
'Ping' => [
+ "ICMP echo request",
{ action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
],
'PostgreSQL' => [
+ "PostgreSQL server",
{ action => 'PARAM', proto => 'tcp', dport => '5432' },
],
'Printer' => [
+ "Line Printer protocol printing",
{ action => 'PARAM', proto => 'tcp', dport => '515' },
],
'RDP' => [
+ "Microsoft Remote Desktop Protocol traffic",
{ action => 'PARAM', proto => 'tcp', dport => '3389' },
],
- 'RIPbi' => [
+ 'RIP' => [
+ "Routing Information Protocol (bidirectional)",
{ action => 'PARAM', proto => 'udp', dport => '520' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
],
'RNDC' => [
+ "BIND remote management protocol",
{ action => 'PARAM', proto => 'tcp', dport => '953' },
],
'Razor' => [
+ "Razor Antispam System",
{ action => 'ACCEPT', proto => 'tcp', dport => '2703' },
],
'Rdate' => [
+ "Remote time retrieval (rdate)",
{ action => 'PARAM', proto => 'tcp', dport => '37' },
],
'Rsync' => [
+ "Rsync server",
{ action => 'PARAM', proto => 'tcp', dport => '873' },
],
'SANE' => [
+ "SANE network scanning",
{ action => 'PARAM', proto => 'tcp', dport => '6566' },
],
'SMB' => [
+ "Microsoft SMB traffic",
{ action => 'PARAM', proto => 'udp', dport => '135,445' },
{ action => 'PARAM', proto => 'udp', dport => '137:139' },
{ action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
{ action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
],
- 'SMBBI' => [
- { action => 'PARAM', proto => 'udp', dport => '135,445' },
- { action => 'PARAM', proto => 'udp', dport => '137:139' },
- { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
- { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
- { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
- ],
'SMBswat' => [
+ "Samba Web Administration Tool",
{ action => 'PARAM', proto => 'tcp', dport => '901' },
],
'SMTP' => [
+ "Simple Mail Transfer Protocol",
{ action => 'PARAM', proto => 'tcp', dport => '25' },
],
'SMTPS' => [
+ "Encrypted Simple Mail Transfer Protocol",
{ action => 'PARAM', proto => 'tcp', dport => '465' },
],
'SNMP' => [
+ "Simple Network Management Protocol",
{ action => 'PARAM', proto => 'udp', dport => '161:162' },
{ action => 'PARAM', proto => 'tcp', dport => '161' },
],
'SPAMD' => [
+ "Spam Assassin SPAMD traffic",
{ action => 'PARAM', proto => 'tcp', dport => '783' },
],
'SSH' => [
+ "Secure shell traffic",
{ action => 'PARAM', proto => 'tcp', dport => '22' },
],
'SVN' => [
+ "Subversion server (svnserve)",
{ action => 'PARAM', proto => 'tcp', dport => '3690' },
],
'SixXS' => [
+ "SixXS IPv6 Deployment and Tunnel Broker",
{ action => 'PARAM', proto => 'tcp', dport => '3874' },
{ action => 'PARAM', proto => 'udp', dport => '3740' },
{ action => 'PARAM', proto => '41' },
{ action => 'PARAM', proto => 'udp', dport => '5072,8374' },
],
'Squid' => [
+ "Squid web proxy traffic",
{ action => 'PARAM', proto => 'tcp', dport => '3128' },
],
'Submission' => [
+ "Mail message submission traffic",
{ action => 'PARAM', proto => 'tcp', dport => '587' },
],
'Syslog' => [
+ "Syslog protocol (RFC 5424) traffic",
{ action => 'PARAM', proto => 'udp', dport => '514' },
{ action => 'PARAM', proto => 'tcp', dport => '514' },
],
'TFTP' => [
+ "Trivial File Transfer Protocol traffic",
{ action => 'PARAM', proto => 'udp', dport => '69' },
],
'Telnet' => [
+ "Telnet traffic",
{ action => 'PARAM', proto => 'tcp', dport => '23' },
],
'Telnets' => [
+ "Telnet over SSL",
{ action => 'PARAM', proto => 'tcp', dport => '992' },
],
'Time' => [
+ "RFC 868 Time protocol",
{ action => 'PARAM', proto => 'tcp', dport => '37' },
],
'Trcrt' => [
+ "Traceroute (for up to 30 hops) traffic",
{ action => 'PARAM', proto => 'udp', dport => '33434:33524' },
{ action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
],
'VNC' => [
- { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
+ "VNC traffic for VNC display's 0 - 99",
+ { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
],
'VNCL' => [
+ "VNC traffic from Vncservers to Vncviewers in listen mode",
{ action => 'PARAM', proto => 'tcp', dport => '5500' },
],
'Web' => [
+ "WWW traffic (HTTP and HTTPS)",
{ action => 'PARAM', proto => 'tcp', dport => '80' },
{ action => 'PARAM', proto => 'tcp', dport => '443' },
],
'Webcache' => [
+ "Web Cache/Proxy traffic (port 8080)",
{ action => 'PARAM', proto => 'tcp', dport => '8080' },
],
'Webmin' => [
+ "Webmin traffic",
{ action => 'PARAM', proto => 'tcp', dport => '10000' },
],
'Whois' => [
+ "Whois (nicname, RFC 3912) traffic",
{ action => 'PARAM', proto => 'tcp', dport => '43' },
],
};
my $pve_fw_parsed_macros;
+my $pve_fw_macro_descr;
+my $pve_fw_macro_ipversion = {};
my $pve_fw_preferred_macro_names = {};
-my $pve_std_chains = {
+my $FWACCEPTMARK_ON = "0x80000000/0x80000000";
+my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
+
+my $pve_std_chains = {};
+my $pve_std_chains_conf = {};
+$pve_std_chains_conf->{4} = {
'PVEFW-SET-ACCEPT-MARK' => [
- "-j MARK --set-mark 1",
+ { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
],
'PVEFW-DropBroadcast' => [
# same as shorewall 'Broadcast'
{ action => 'DROP', dsttype => 'BROADCAST' },
{ action => 'DROP', dsttype => 'MULTICAST' },
{ action => 'DROP', dsttype => 'ANYCAST' },
- { action => 'DROP', dest => '224.0.0.0/4' },
+ { action => 'DROP', dest => '224.0.0.0/4' },
],
'PVEFW-reject' => [
# same as shorewall 'reject'
{ action => 'DROP', dsttype => 'BROADCAST' },
- { action => 'DROP', source => '224.0.0.0/4' },
+ { action => 'DROP', source => '224.0.0.0/4' },
{ action => 'DROP', proto => 'icmp' },
- "-p tcp -j REJECT --reject-with tcp-reset",
- "-p udp -j REJECT --reject-with icmp-port-unreachable",
- "-p icmp -j REJECT --reject-with icmp-host-unreachable",
- "-j REJECT --reject-with icmp-host-prohibited",
+ { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
+ { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
+ { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
+ { target => '-j REJECT --reject-with icmp-host-prohibited' },
],
'PVEFW-Drop' => [
- # same as shorewall 'Drop', which is equal to DROP,
+ # same as shorewall 'Drop', which is equal to DROP,
# but REJECT/DROP some packages to reduce logging,
# and ACCEPT critical ICMP types
{ action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
{ action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
{ action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
# Drop packets with INVALID state
- "-m conntrack --ctstate INVALID -j DROP",
+ { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
# Drop Microsoft SMB noise
- { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
- { action => 'DROP', proto => 'udp', dport => '137:139'},
+ { action => 'DROP', proto => 'udp', dport => '135,445' },
+ { action => 'DROP', proto => 'udp', dport => '137:139' },
{ action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
- { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
+ { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
{ action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
# Drop new/NotSyn traffic so that it doesn't get logged
- "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
+ { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
# Drop DNS replies
{ action => 'DROP', proto => 'udp', sport => 53 },
],
'PVEFW-Reject' => [
- # same as shorewall 'Reject', which is equal to Reject,
+ # same as shorewall 'Reject', which is equal to Reject,
# but REJECT/DROP some packages to reduce logging,
# and ACCEPT critical ICMP types
{ action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
{ action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
{ action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
# Drop packets with INVALID state
- "-m conntrack --ctstate INVALID -j DROP",
+ { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
# Drop Microsoft SMB noise
- { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
+ { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
{ action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
{ action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
- { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
+ { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
{ action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
# Drop new/NotSyn traffic so that it doesn't get logged
- "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
+ { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
# Drop DNS replies
{ action => 'DROP', proto => 'udp', sport => 53 },
],
'PVEFW-tcpflags' => [
# same as shorewall tcpflags action.
# Packets arriving on this interface are checked for som illegal combinations of TCP flags
- "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
- "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
- "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
],
'PVEFW-smurfs' => [
# same as shorewall smurfs action
# Filter packets for smurfs (packets with a broadcast address as the source).
- "-s 0.0.0.0/32 -j RETURN",
- "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
- "-s 224.0.0.0/4 -g PVEFW-smurflog",
+ { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
+ { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
+ { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
+ ],
+ 'PVEFW-smurflog' => [
+ { action => 'DROP', logmsg => 'DROP: ' },
+ ],
+ 'PVEFW-logflags' => [
+ { action => 'DROP', logmsg => 'DROP: ' },
+ ],
+};
+
+$pve_std_chains_conf->{6} = {
+ 'PVEFW-SET-ACCEPT-MARK' => [
+ { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
+ ],
+ 'PVEFW-DropBroadcast' => [
+ # same as shorewall 'Broadcast'
+ # simply DROP BROADCAST/MULTICAST/ANYCAST
+ # we can use this to reduce logging
+ #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
+ # ipv6 addrtype does not work with kernel 2.6.32
+ #{ action => 'DROP', dsttype => 'MULTICAST' },
+ #{ action => 'DROP', dsttype => 'ANYCAST' },
+ { action => 'DROP', dest => 'ff00::/8' },
+ #{ action => 'DROP', dest => '224.0.0.0/4' },
+ ],
+ 'PVEFW-reject' => [
+ # same as shorewall 'reject'
+ #{ action => 'DROP', dsttype => 'BROADCAST' },
+ #{ action => 'DROP', source => '224.0.0.0/4' },
+ { action => 'DROP', proto => 'icmpv6' },
+ { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
+ #"-p udp -j REJECT --reject-with icmp-port-unreachable",
+ #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
+ #"-j REJECT --reject-with icmp-host-prohibited",
+ ],
+ 'PVEFW-Drop' => [
+ # same as shorewall 'Drop', which is equal to DROP,
+ # but REJECT/DROP some packages to reduce logging,
+ # and ACCEPT critical ICMP types
+ { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
+ # we are not interested in BROADCAST/MULTICAST/ANYCAST
+ { action => 'PVEFW-DropBroadcast' },
+ # ACCEPT critical ICMP types
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
+ # Drop packets with INVALID state
+ { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
+ # Drop Microsoft SMB noise
+ { action => 'DROP', proto => 'udp', dport => '135,445' },
+ { action => 'DROP', proto => 'udp', dport => '137:139'},
+ { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
+ { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
+ { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
+ # Drop new/NotSyn traffic so that it doesn't get logged
+ { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
+ # Drop DNS replies
+ { action => 'DROP', proto => 'udp', sport => 53 },
+ ],
+ 'PVEFW-Reject' => [
+ # same as shorewall 'Reject', which is equal to Reject,
+ # but REJECT/DROP some packages to reduce logging,
+ # and ACCEPT critical ICMP types
+ { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
+ # we are not interested in BROADCAST/MULTICAST/ANYCAST
+ { action => 'PVEFW-DropBroadcast' },
+ # ACCEPT critical ICMP types
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
+ { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
+ # Drop packets with INVALID state
+ { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
+ # Drop Microsoft SMB noise
+ { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
+ { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
+ { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
+ { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
+ { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
+ # Drop new/NotSyn traffic so that it doesn't get logged
+ { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
+ # Drop DNS replies
+ { action => 'DROP', proto => 'udp', sport => 53 },
+ ],
+ 'PVEFW-tcpflags' => [
+ # same as shorewall tcpflags action.
+ # Packets arriving on this interface are checked for som illegal combinations of TCP flags
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
+ { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
+ ],
+ 'PVEFW-logflags' => [
+ { action => 'DROP', logmsg => 'DROP: ' },
],
};
'address-mask-reply' => 1,
};
-sub get_firewall_macros {
+# ip6tables -p icmpv6 -h
+
+my $icmpv6_type_names = {
+ 'any' => 1,
+ 'destination-unreachable' => 1,
+ 'no-route' => 1,
+ 'communication-prohibited' => 1,
+ 'address-unreachable' => 1,
+ 'port-unreachable' => 1,
+ 'packet-too-big' => 1,
+ 'time-exceeded' => 1,
+ 'ttl-zero-during-transit' => 1,
+ 'ttl-zero-during-reassembly' => 1,
+ 'parameter-problem' => 1,
+ 'bad-header' => 1,
+ 'unknown-header-type' => 1,
+ 'unknown-option' => 1,
+ 'echo-request' => 1,
+ 'echo-reply' => 1,
+ 'router-solicitation' => 1,
+ 'router-advertisement' => 1,
+ 'neighbor-solicitation' => 1,
+ 'neighbour-solicitation' => 1,
+ 'neighbor-advertisement' => 1,
+ 'neighbour-advertisement' => 1,
+ 'redirect' => 1,
+};
- return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
+sub init_firewall_macros {
$pve_fw_parsed_macros = {};
+ my $parse = sub {
+ my ($k, $macro) = @_;
+ my $lc_name = lc($k);
+ $pve_fw_macro_ipversion->{$k} = 0;
+ while (!ref($macro->[0])) {
+ my $desc = shift @$macro;
+ if ($desc eq 'ipv4only') {
+ $pve_fw_macro_ipversion->{$k} = 4;
+ } elsif ($desc eq 'ipv6only') {
+ $pve_fw_macro_ipversion->{$k} = 6;
+ } else {
+ $pve_fw_macro_descr->{$k} = $desc;
+ }
+ }
+ $pve_fw_preferred_macro_names->{$lc_name} = $k;
+ $pve_fw_parsed_macros->{$k} = $macro;
+ };
+
foreach my $k (keys %$pve_fw_macros) {
- my $name = lc($k);
+ &$parse($k, $pve_fw_macros->{$k});
+ }
- my $macro = $pve_fw_macros->{$k};
- $pve_fw_preferred_macro_names->{$name} = $k;
- $pve_fw_parsed_macros->{$name} = $macro;
+ foreach my $k (keys %$pve_ipv6fw_macros) {
+ next if $pve_fw_parsed_macros->{$k};
+ &$parse($k, $pve_ipv6fw_macros->{$k});
+ $pve_fw_macro_ipversion->{$k} = 6;
}
+}
+
+init_firewall_macros();
- return $pve_fw_parsed_macros;
+sub get_macros {
+ return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
}
my $etc_services;
next if $line =~m/^#/;
next if ($line =~m/^\s*$/);
- if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
+ if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
$services->{byid}->{$2}->{name} = $1;
$services->{byid}->{$2}->{port} = $2;
$services->{byid}->{$2}->{$3} = 1;
return $etc_services;
}
-my $etc_protocols;
-
-sub get_etc_protocols {
- return $etc_protocols if $etc_protocols;
-
- my $filename = "/etc/protocols";
+sub parse_protocol_file {
+ my ($filename) = @_;
my $fh = IO::File->new($filename, O_RDONLY);
if (!$fh) {
next if $line =~m/^#/;
next if ($line =~m/^\s*$/);
- if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
+ if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
$protocols->{byid}->{$2}->{name} = $1;
$protocols->{byname}->{$1} = $protocols->{byid}->{$2};
}
close($fh);
+ return $protocols;
+}
+
+my $etc_protocols;
+
+sub get_etc_protocols {
+ return $etc_protocols if $etc_protocols;
+
+ my $protocols = parse_protocol_file('/etc/protocols');
+
+ # add special case for ICMP v6
+ $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
+ $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
+
$etc_protocols = $protocols;
return $etc_protocols;
}
-sub parse_address_list {
- my ($str) = @_;
+my $etc_ethertypes;
- my $nbaor = 0;
- foreach my $aor (split(/,/, $str)) {
- if (!Net::IP->new($aor)) {
- my $err = Net::IP::Error();
- die "invalid IP address: $err\n";
- }else{
- $nbaor++;
- }
- }
- return $nbaor;
+sub get_etc_ethertypes {
+ $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
+ if !$etc_ethertypes;
+ return $etc_ethertypes;
}
-sub parse_port_name_number_or_range {
- my ($str) = @_;
+my $__local_network;
- my $services = PVE::Firewall::get_etc_services();
- my $nbports = 0;
- foreach my $item (split(/,/, $str)) {
- my $portlist = "";
- my $oldpon = undef;
- $nbports++;
- foreach my $pon (split(':', $item, 2)) {
- $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
- if ($pon =~ m/^\d+$/){
- die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
- die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
- $oldpon = $pon;
- }else{
- die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
- }
- }
- }
+sub local_network {
+ my ($new_value) = @_;
- return ($nbports);
-}
+ $__local_network = $new_value if defined($new_value);
-# helper function for API
-sub cleanup_fw_rule {
- my ($rule, $digest, $pos) = @_;
+ return $__local_network if defined($__local_network);
- my $r = {};
+ eval {
+ my $nodename = PVE::INotify::nodename();
- foreach my $k (keys %$rule) {
- next if $k eq 'nbdport';
- next if $k eq 'nbsport';
- my $v = $rule->{$k};
- next if !defined($v);
- $r->{$k} = $v;
- $r->{digest} = $digest;
- $r->{pos} = $pos;
- }
+ my $ip = PVE::Cluster::remote_node_ip($nodename);
- return $r;
-}
+ my $testip = Net::IP->new($ip);
-my $bridge_firewall_enabled = 0;
+ my $isv6 = $testip->version == 6;
+ my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
+ : PVE::ProcFSTools::read_proc_net_route();
+ foreach my $entry (@$routes) {
+ my $mask;
+ if ($isv6) {
+ $mask = $entry->{prefix};
+ next if !$mask; # skip the default route...
+ } else {
+ $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
+ next if !defined($mask);
+ }
+ my $cidr = "$entry->{dest}/$mask";
+ my $testnet = Net::IP->new($cidr);
+ my $overlap = $testnet->overlaps($testip);
+ if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
+ $overlap == $Net::IP::IP_IDENTICAL)
+ {
+ $__local_network = $cidr;
+ return;
+ }
+ }
+ };
+ warn $@ if $@;
-sub enable_bridge_firewall {
+ return $__local_network;
+}
- return if $bridge_firewall_enabled; # only once
+# ipset names are limited to 31 characters,
+# and we use '-v4' or '-v6' to indicate IP versions,
+# and we use '_swap' suffix for atomic update,
+# for example PVEFW-${VMID}-${ipset_name}_swap
- PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
- PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
+my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
- # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
- PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
+sub compute_ipset_chain_name {
+ my ($vmid, $ipset_name, $ipversion) = @_;
- $bridge_firewall_enabled = 1;
-}
+ $vmid = 0 if !defined($vmid);
-my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
+ my $id = "$vmid-${ipset_name}-v$ipversion";
-sub iptables {
- my ($cmd) = @_;
+ if (length($id) > $max_iptables_ipset_name_length) {
+ $id = PVE::Tools::fnv31a_hex($id);
+ }
- run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
+ return "PVEFW-$id";
}
-sub iptables_restore_cmdlist {
- my ($cmdlist) = @_;
+sub compute_ipfilter_ipset_name {
+ my ($iface) = @_;
- run_command("/sbin/iptables-restore -n", input => $cmdlist);
+ return "ipfilter-$iface";
}
-sub iptables_get_chains {
-
- my $res = {};
+sub parse_address_list {
+ my ($str) = @_;
- # check what chains we want to track
- my $is_pvefw_chain = sub {
- my $name = shift;
+ if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
+ die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
+ return;
+ }
- return 1 if $name =~ m/^PVEFW-\S+$/;
+ if ($str =~ m/^${ip_alias_pattern}$/) {
+ die "alias name too long\n" if length($str) > $max_alias_name_length;
+ return;
+ }
- return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
+ my $count = 0;
+ my $iprange = 0;
+ my $ipversion;
- return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
+ my @elements = split(/,/, $str);
+ die "extraneous commas in list\n" if $str ne join(',', @elements);
+ foreach my $elem (@elements) {
+ $count++;
+ my $ip = Net::IP->new($elem);
+ if (!$ip) {
+ my $err = Net::IP::Error();
+ die "invalid IP address: $err\n";
+ }
+ $iprange = 1 if $elem =~ m/-/;
- return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
+ my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
- return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
- return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
+ die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
+ if $ipversion && ($new_ipversion != $ipversion);
- return undef;
- };
+ $ipversion = $new_ipversion;
+ }
- my $table = '';
+ die "you can't use a range in a list\n" if $iprange && $count > 1;
- my $parser = sub {
- my $line = shift;
+ return $ipversion;
+}
- return if $line =~ m/^#/;
- return if $line =~ m/^\s*$/;
+sub parse_port_name_number_or_range {
+ my ($str, $dport) = @_;
- if ($line =~ m/^\*(\S+)$/) {
- $table = $1;
- return;
+ my $services = PVE::Firewall::get_etc_services();
+ my $count = 0;
+ my $icmp_port = 0;
+
+ my @elements = split(/,/, $str);
+ die "extraneous commas in list\n" if $str ne join(',', @elements);
+ foreach my $item (@elements) {
+ if ($item =~ m/^(\d+):(\d+)$/) {
+ $count += 2;
+ my ($port1, $port2) = ($1, $2);
+ die "invalid port '$port1'\n" if $port1 > 65535;
+ die "invalid port '$port2'\n" if $port2 > 65535;
+ } elsif ($item =~ m/^(\d+)$/) {
+ $count += 1;
+ my $port = $1;
+ die "invalid port '$port'\n" if $port > 65535;
+ } else {
+ if ($dport && $icmp_type_names->{$item}) {
+ $icmp_port = 1;
+ } elsif ($dport && $icmpv6_type_names->{$item}) {
+ $icmp_port = 1;
+ } else {
+ die "invalid port '$item'\n" if !$services->{byname}->{$item};
+ }
}
+ }
- return if $table ne 'filter';
+ die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
- if ($line =~ m/^:(\S+)\s/) {
- my $chain = $1;
- return if !&$is_pvefw_chain($chain);
- $res->{$chain} = "unknown";
- } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
- my ($chain, $sig) = ($1, $2);
- return if !&$is_pvefw_chain($chain);
- $res->{$chain} = $sig;
- } else {
- # simply ignore the rest
- return;
- }
- };
+ # I really don't like to use the word number here, but it's the only thing
+ # that makes sense in a literal way. The range 1:100 counts as 2, not as
+ # one and not as 100...
+ die "too many entries in port list (> 15 numbers)\n"
+ if $count > 15;
- run_command("/sbin/iptables-save", outfunc => $parser);
+ return (scalar(@elements) > 1);
+}
- return $res;
+PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
+sub pve_fw_verify_sport_spec {
+ my ($portstr) = @_;
+
+ parse_port_name_number_or_range($portstr, 0);
+
+ return $portstr;
}
-sub iptables_chain_exist {
- my ($chain) = @_;
+PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
+sub pve_fw_verify_dport_spec {
+ my ($portstr) = @_;
- eval{
- iptables("-n --list $chain");
- };
- return undef if $@;
+ parse_port_name_number_or_range($portstr, 1);
- return 1;
+ return $portstr;
}
-sub iptables_rule_exist {
- my ($rule) = @_;
+PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
+sub pve_fw_verify_addr_spec {
+ my ($list) = @_;
- eval{
- iptables("-C $rule");
- };
- return undef if $@;
+ parse_address_list($list);
- return 1;
+ return $list;
}
-sub ruleset_generate_cmdstr {
- my ($ruleset, $chain, $rule, $actions, $goto) = @_;
+PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
+sub pve_fw_verify_protocol_spec {
+ my ($proto) = @_;
- return if defined($rule->{enable}) && !$rule->{enable};
+ my $protocols = get_etc_protocols();
- my @cmd = ();
+ die "unknown protocol '$proto'\n" if $proto &&
+ !(defined($protocols->{byname}->{$proto}) ||
+ defined($protocols->{byid}->{$proto}));
- push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
- push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
+ return $proto;
+}
- push @cmd, "-m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
- push @cmd, "-s $rule->{source}" if $rule->{source};
- push @cmd, "-m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
- push @cmd, "-d $rule->{dest}" if $rule->{dest};
- if ($rule->{proto}) {
- push @cmd, "-p $rule->{proto}";
+# helper function for API
- my $multiport = 0;
- $multiport++ if $rule->{nbdport} && ($rule->{nbdport} > 1);
- $multiport++ if $rule->{nbsport} && ($rule->{nbsport} > 1);
+sub copy_opject_with_digest {
+ my ($object) = @_;
- push @cmd, "--match multiport" if $multiport;
+ my $sha = Digest::SHA->new('sha1');
- die "multiport: option '--sports' cannot be used together with '--dports'\n"
- if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
+ my $res = {};
+ foreach my $k (sort keys %$object) {
+ my $v = $object->{$k};
+ next if !defined($v);
+ $res->{$k} = $v;
+ $sha->add($k, ':', $v, "\n");
+ }
- if ($rule->{dport}) {
- if ($rule->{proto} && $rule->{proto} eq 'icmp') {
- # Note: we use dport to store --icmp-type
- die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
- push @cmd, "-m icmp --icmp-type $rule->{dport}";
- } else {
- if ($rule->{nbdport} && $rule->{nbdport} > 1) {
- if ($multiport == 2) {
- push @cmd, "--ports $rule->{dport}";
- } else {
- push @cmd, "--dports $rule->{dport}";
- }
- } else {
- push @cmd, "--dport $rule->{dport}";
- }
- }
- }
+ my $digest = $sha->hexdigest;
- if ($rule->{sport}) {
- if ($rule->{nbsport} && $rule->{nbsport} > 1) {
- push @cmd, "--sports $rule->{sport}" if $multiport != 2;
- } else {
- push @cmd, "--sport $rule->{sport}";
- }
+ $res->{digest} = $digest;
+
+ return wantarray ? ($res, $digest) : $res;
+}
+
+sub copy_list_with_digest {
+ my ($list) = @_;
+
+ my $sha = Digest::SHA->new('sha1');
+
+ my $res = [];
+ foreach my $entry (@$list) {
+ my $data = {};
+ foreach my $k (sort keys %$entry) {
+ my $v = $entry->{$k};
+ next if !defined($v);
+ $data->{$k} = $v;
+ # Note: digest ignores refs ($rule->{errors})
+ # since Digest::SHA expects a series of bytes,
+ # we have to encode the value here to prevent errors when
+ # using utf8 characters (eg. in comments)
+ $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
}
- } elsif ($rule->{dport} || $rule->{sport}) {
- warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
- warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
+ push @$res, $data;
}
- push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
+ my $digest = $sha->hexdigest;
- if (my $action = $rule->{action}) {
- $action = $actions->{$action} if defined($actions->{$action});
- $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
- push @cmd, $goto ? "-g $action" : "-j $action";
+ foreach my $entry (@$res) {
+ $entry->{digest} = $digest;
}
- return scalar(@cmd) ? join(' ', @cmd) : undef;
+ return wantarray ? ($res, $digest) : $res;
}
-sub ruleset_generate_rule {
- my ($ruleset, $chain, $rule, $actions, $goto) = @_;
+our $cluster_option_properties = {
+ enable => {
+ description => "Enable or disable the firewall cluster wide.",
+ type => 'integer',
+ minimum => 0,
+ optional => 1,
+ },
+ policy_in => {
+ description => "Input policy.",
+ type => 'string',
+ optional => 1,
+ enum => ['ACCEPT', 'REJECT', 'DROP'],
+ },
+ policy_out => {
+ description => "Output policy.",
+ type => 'string',
+ optional => 1,
+ enum => ['ACCEPT', 'REJECT', 'DROP'],
+ },
+};
+
+our $host_option_properties = {
+ enable => {
+ description => "Enable host firewall rules.",
+ type => 'boolean',
+ optional => 1,
+ },
+ log_level_in => get_standard_option('pve-fw-loglevel', {
+ description => "Log level for incoming traffic." }),
+ log_level_out => get_standard_option('pve-fw-loglevel', {
+ description => "Log level for outgoing traffic." }),
+ tcp_flags_log_level => get_standard_option('pve-fw-loglevel', {
+ description => "Log level for illegal tcp flags filter." }),
+ smurf_log_level => get_standard_option('pve-fw-loglevel', {
+ description => "Log level for SMURFS filter." }),
+ nosmurfs => {
+ description => "Enable SMURFS filter.",
+ type => 'boolean',
+ optional => 1,
+ },
+ tcpflags => {
+ description => "Filter illegal combinations of TCP flags.",
+ type => 'boolean',
+ optional => 1,
+ },
+ nf_conntrack_max => {
+ description => "Maximum number of tracked connections.",
+ type => 'integer',
+ optional => 1,
+ minimum => 32768,
+ },
+ nf_conntrack_tcp_timeout_established => {
+ description => "Conntrack established timeout.",
+ type => 'integer',
+ optional => 1,
+ minimum => 7875,
+ },
+ ndp => {
+ description => "Enable NDP.",
+ type => 'boolean',
+ optional => 1,
+ },
+};
+
+our $vm_option_properties = {
+ enable => {
+ description => "Enable/disable firewall rules.",
+ type => 'boolean',
+ optional => 1,
+ },
+ macfilter => {
+ description => "Enable/disable MAC address filter.",
+ type => 'boolean',
+ optional => 1,
+ },
+ dhcp => {
+ description => "Enable DHCP.",
+ type => 'boolean',
+ optional => 1,
+ },
+ ndp => {
+ description => "Enable NDP.",
+ type => 'boolean',
+ optional => 1,
+ },
+ radv => {
+ description => "Allow sending Router Advertisement.",
+ type => 'boolean',
+ optional => 1,
+ },
+ ipfilter => {
+ description => "Enable default IP filters. " .
+ "This is equivalent to adding an empty ipfilter-net<id> ipset " .
+ "for every interface. Such ipsets implicitly contain sane default " .
+ "restrictions such as restricting IPv6 link local addresses to " .
+ "the one derived from the interface's MAC address. For containers " .
+ "the configured IP addresses will be implicitly added.",
+ type => 'boolean',
+ optional => 1,
+ },
+ policy_in => {
+ description => "Input policy.",
+ type => 'string',
+ optional => 1,
+ enum => ['ACCEPT', 'REJECT', 'DROP'],
+ },
+ policy_out => {
+ description => "Output policy.",
+ type => 'string',
+ optional => 1,
+ enum => ['ACCEPT', 'REJECT', 'DROP'],
+ },
+ log_level_in => get_standard_option('pve-fw-loglevel', {
+ description => "Log level for incoming traffic." }),
+ log_level_out => get_standard_option('pve-fw-loglevel', {
+ description => "Log level for outgoing traffic." }),
- if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
- ruleset_addrule($ruleset, $chain, $cmdstr);
+};
+
+
+my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
+
+my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
+
+my $rule_properties = {
+ pos => {
+ description => "Update rule at position <pos>.",
+ type => 'integer',
+ minimum => 0,
+ optional => 1,
+ },
+ digest => get_standard_option('pve-config-digest'),
+ type => {
+ description => "Rule type.",
+ type => 'string',
+ optional => 1,
+ enum => ['in', 'out', 'group'],
+ },
+ action => {
+ description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
+ type => 'string',
+ optional => 1,
+ pattern => $security_group_name_pattern,
+ maxLength => 20,
+ minLength => 2,
+ },
+ macro => {
+ description => "Use predefined standard macro.",
+ type => 'string',
+ optional => 1,
+ maxLength => 128,
+ },
+ iface => get_standard_option('pve-iface', {
+ description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
+ optional => 1
+ }),
+ source => {
+ description => "Restrict packet source address. $addr_list_descr",
+ type => 'string', format => 'pve-fw-addr-spec',
+ optional => 1,
+ },
+ dest => {
+ description => "Restrict packet destination address. $addr_list_descr",
+ type => 'string', format => 'pve-fw-addr-spec',
+ optional => 1,
+ },
+ proto => {
+ description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
+ type => 'string', format => 'pve-fw-protocol-spec',
+ optional => 1,
+ },
+ enable => {
+ description => "Flag to enable/disable a rule.",
+ type => 'integer',
+ minimum => 0,
+ optional => 1,
+ },
+ sport => {
+ description => "Restrict TCP/UDP source port. $port_descr",
+ type => 'string', format => 'pve-fw-sport-spec',
+ optional => 1,
+ },
+ dport => {
+ description => "Restrict TCP/UDP destination port. $port_descr",
+ type => 'string', format => 'pve-fw-dport-spec',
+ optional => 1,
+ },
+ comment => {
+ description => "Descriptive comment.",
+ type => 'string',
+ optional => 1,
+ },
+};
+
+sub add_rule_properties {
+ my ($properties) = @_;
+
+ foreach my $k (keys %$rule_properties) {
+ my $h = $rule_properties->{$k};
+ # copy data, so that we can modify later without side effects
+ foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
}
+
+ return $properties;
}
-sub ruleset_generate_rule_insert {
- my ($ruleset, $chain, $rule, $actions, $goto) = @_;
+sub delete_rule_properties {
+ my ($rule, $delete_str) = @_;
- if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
- ruleset_insertrule($ruleset, $chain, $cmdstr);
+ foreach my $opt (PVE::Tools::split_list($delete_str)) {
+ raise_param_exc({ 'delete' => "no such property ('$opt')"})
+ if !defined($rule_properties->{$opt});
+ raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
+ if $opt eq 'type' || $opt eq 'action';
+ delete $rule->{$opt};
}
+
+ return $rule;
}
-sub ruleset_create_chain {
- my ($ruleset, $chain) = @_;
-
- die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
- die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
-
- die "chain '$chain' already exists\n" if $ruleset->{$chain};
-
- $ruleset->{$chain} = [];
-}
-
-sub ruleset_chain_exist {
- my ($ruleset, $chain) = @_;
-
- return $ruleset->{$chain} ? 1 : undef;
-}
+my $apply_macro = sub {
+ my ($macro_name, $param, $verify, $ipversion) = @_;
-sub ruleset_addrule {
- my ($ruleset, $chain, $rule) = @_;
+ my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
+ die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
- die "no such chain '$chain'\n" if !$ruleset->{$chain};
+ if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
+ $macro_rules = $pve_ipv6fw_macros->{$macro_name};
+ }
- push @{$ruleset->{$chain}}, "-A $chain $rule";
-}
+ # skip macros which are specific to another ipversion
+ if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
+ return if $ipversion != $required;
+ }
-sub ruleset_insertrule {
- my ($ruleset, $chain, $rule) = @_;
+ my $rules = [];
- die "no such chain '$chain'\n" if !$ruleset->{$chain};
+ foreach my $templ (@$macro_rules) {
+ my $rule = {};
+ my $param_used = {};
+ foreach my $k (keys %$templ) {
+ my $v = $templ->{$k};
+ if ($v eq 'PARAM') {
+ $v = $param->{$k};
+ $param_used->{$k} = 1;
+ } elsif ($v eq 'DEST') {
+ $v = $param->{dest};
+ $param_used->{dest} = 1;
+ } elsif ($v eq 'SOURCE') {
+ $v = $param->{source};
+ $param_used->{source} = 1;
+ }
- unshift @{$ruleset->{$chain}}, "-A $chain $rule";
-}
+ if (!defined($v)) {
+ my $msg = "missing parameter '$k' in macro '$macro_name'";
+ raise_param_exc({ macro => $msg }) if $verify;
+ die "$msg\n";
+ }
+ $rule->{$k} = $v;
+ }
+ foreach my $k (keys %$param) {
+ next if $k eq 'macro';
+ next if !defined($param->{$k});
+ next if $param_used->{$k};
+ if (defined($rule->{$k})) {
+ if ($rule->{$k} ne $param->{$k}) {
+ my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
+ raise_param_exc({ $k => $msg }) if $verify;
+ die "$msg\n";
+ }
+ } else {
+ $rule->{$k} = $param->{$k};
+ }
+ }
+ push @$rules, $rule;
+ }
-sub get_log_rule_base {
- my ($chain, $vmid, $msg, $loglevel) = @_;
-
- die "internal error - no log level" if !defined($loglevel);
+ return $rules;
+};
- $vmid = 0 if !defined($vmid);
+my $rule_env_iface_lookup = {
+ 'ct' => 1,
+ 'vm' => 1,
+ 'group' => 0,
+ 'cluster' => 1,
+ 'host' => 1,
+};
- # Note: we use special format for prefix to pass further
- # info to log daemon (VMID, LOGVELEL and CHAIN)
+sub verify_rule {
+ my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
- return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
-}
+ my $allow_groups = $rule_env eq 'group' ? 0 : 1;
-sub ruleset_addlog {
- my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
+ my $allow_iface = $rule_env_iface_lookup->{$rule_env};
+ die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
- return if !defined($loglevel);
+ my $errors = $rule->{errors} || {};
- my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
+ my $error_count = 0;
- $logrule = "$rule $logrule" if defined($rule);
+ my $add_error = sub {
+ my ($param, $msg) = @_;
+ chomp $msg;
+ raise_param_exc({ $param => $msg }) if !$noerr;
+ $error_count++;
+ $errors->{$param} = $msg if !$errors->{$param};
+ };
- ruleset_addrule($ruleset, $chain, $logrule)
-}
+ my $ipversion;
+ my $set_ip_version = sub {
+ my $vers = shift;
+ if ($vers) {
+ die "detected mixed ipv4/ipv6 adresses in rule\n"
+ if $ipversion && ($vers != $ipversion);
+ $ipversion = $vers;
+ }
+ };
-sub generate_bridge_chains {
- my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
+ my $check_ipset_or_alias_property = sub {
+ my ($name, $expected_ipversion) = @_;
- my $options = $hostfw_conf->{options} || {};
+ if (my $value = $rule->{$name}) {
+ if ($value =~ m/^\+/) {
+ if ($value =~ m/^\+(${ipset_name_pattern})$/) {
+ &$add_error($name, "no such ipset '$1'")
+ if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
- die "error: detected direct route to bridge '$bridge'\n"
- if !$options->{allow_bridge_route} && $routing_table->{$bridge};
+ } else {
+ &$add_error($name, "invalid ipset name '$value'");
+ }
+ } elsif ($value =~ m/^${ip_alias_pattern}$/){
+ my $alias = lc($value);
+ &$add_error($name, "no such alias '$value'")
+ if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
+ my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
+ $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
+
+ &$set_ip_version($e->{ipversion});
+ }
+ }
+ };
- if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
- ruleset_create_chain($ruleset, "$bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
+ my $type = $rule->{type};
+ my $action = $rule->{action};
+
+ &$add_error('type', "missing property") if !$type;
+ &$add_error('action', "missing property") if !$action;
+
+ if ($type) {
+ if ($type eq 'in' || $type eq 'out') {
+ &$add_error('action', "unknown action '$action'")
+ if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
+ } elsif ($type eq 'group') {
+ &$add_error('type', "security groups not allowed")
+ if !$allow_groups;
+ &$add_error('action', "invalid characters in security group name")
+ if $action && ($action !~ m/^${security_group_name_pattern}$/);
+ } else {
+ &$add_error('type', "unknown rule type '$type'");
+ }
}
- if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
- ruleset_create_chain($ruleset, "$bridge-OUT");
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
- ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
+ if ($rule->{iface}) {
+ &$add_error('type', "parameter -i not allowed for this rule type")
+ if !$allow_iface;
+ eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
+ &$add_error('iface', $@) if $@;
+ if ($rule_env eq 'vm' || $rule_env eq 'ct') {
+ &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
+ if $rule->{iface} !~ m/^net(\d+)$/;
+ }
}
- if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
- ruleset_create_chain($ruleset, "$bridge-IN");
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
- ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
- # accept traffic to unmanaged bridge ports
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
+ if ($rule->{macro}) {
+ if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
+ $rule->{macro} = $preferred_name;
+ } else {
+ &$add_error('macro', "unknown macro '$rule->{macro}'");
+ }
}
-}
-
-sub ruleset_add_chain_policy {
- my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
- if ($policy eq 'ACCEPT') {
-
- ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
- { ACCEPT => $accept_action});
+ if ($rule->{proto}) {
+ eval { pve_fw_verify_protocol_spec($rule->{proto}); };
+ &$add_error('proto', $@) if $@;
+ &$set_ip_version(4) if $rule->{proto} eq 'icmp';
+ &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
+ }
- } elsif ($policy eq 'DROP') {
+ if ($rule->{dport}) {
+ eval { parse_port_name_number_or_range($rule->{dport}, 1); };
+ &$add_error('dport', $@) if $@;
+ my $proto = $rule->{proto};
+ &$add_error('proto', "missing property - 'dport' requires this property")
+ if !$proto;
+ &$add_error('dport', "protocol '$proto' does not support ports")
+ if !$PROTOCOLS_WITH_PORTS->{$proto} &&
+ $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
+ }
- ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
+ if ($rule->{sport}) {
+ eval { parse_port_name_number_or_range($rule->{sport}, 0); };
+ &$add_error('sport', $@) if $@;
+ my $proto = $rule->{proto};
+ &$add_error('proto', "missing property - 'sport' requires this property")
+ if !$proto;
+ &$add_error('sport', "protocol '$proto' does not support ports")
+ if !$PROTOCOLS_WITH_PORTS->{$proto};
+ }
- ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
+ if ($rule->{source}) {
+ eval {
+ my $source_ipversion = parse_address_list($rule->{source});
+ &$set_ip_version($source_ipversion);
+ };
+ &$add_error('source', $@) if $@;
+ &$check_ipset_or_alias_property('source', $ipversion);
+ }
- ruleset_addrule($ruleset, $chain, "-j DROP");
- } elsif ($policy eq 'REJECT') {
- ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
+ if ($rule->{dest}) {
+ eval {
+ my $dest_ipversion = parse_address_list($rule->{dest});
+ &$set_ip_version($dest_ipversion);
+ };
+ &$add_error('dest', $@) if $@;
+ &$check_ipset_or_alias_property('dest', $ipversion);
+ }
- ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
+ $rule->{ipversion} = $ipversion if $ipversion;
- ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
- } else {
- # should not happen
- die "internal error: unknown policy '$policy'";
+ if ($rule->{macro} && !$error_count) {
+ eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
+ if (my $err = $@) {
+ if (ref($err) eq "PVE::Exception" && $err->{errors}) {
+ my $eh = $err->{errors};
+ foreach my $p (keys %$eh) {
+ &$add_error($p, $eh->{$p});
+ }
+ } else {
+ &$add_error('macro', "$err");
+ }
+ }
}
-}
-sub ruleset_create_vm_chain {
- my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
+ $rule->{errors} = $errors if $error_count;
- ruleset_create_chain($ruleset, $chain);
+ return $rule;
+}
- if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
- }
+sub copy_rule_data {
+ my ($rule, $param) = @_;
- if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
- if ($direction eq 'OUT') {
- ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
- proto => 'udp', sport => 68, dport => 67 });
- } else {
- ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
- proto => 'udp', sport => 67, dport => 68 });
+ foreach my $k (keys %$rule_properties) {
+ if (defined(my $v = $param->{$k})) {
+ if ($v eq '' || $v eq '-') {
+ delete $rule->{$k};
+ } else {
+ $rule->{$k} = $v;
+ }
}
}
- if ($options->{tcpflags}) {
- ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
- }
+ return $rule;
+}
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
+sub rules_modify_permissions {
+ my ($rule_env) = @_;
- if ($direction eq 'OUT') {
- if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
- ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
+ if ($rule_env eq 'host') {
+ return {
+ check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
+ };
+ } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
+ return {
+ check => ['perm', '/', [ 'Sys.Modify' ]],
+ };
+ } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
+ return {
+ check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
}
- ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
}
-}
-sub ruleset_generate_vm_rules {
- my ($ruleset, $rules, $groups_conf, $chain, $netid, $direction) = @_;
+ return undef;
+}
- my $lc_direction = lc($direction);
+sub rules_audit_permissions {
+ my ($rule_env) = @_;
- foreach my $rule (@$rules) {
- next if $rule->{iface} && $rule->{iface} ne $netid;
- next if !$rule->{enable};
- if ($rule->{type} eq 'group') {
- my $group_chain = "GROUP-$rule->{action}-$direction";
- if(!ruleset_chain_exist($ruleset, $group_chain)){
- generate_group_rules($ruleset, $groups_conf, $rule->{action});
- }
- ruleset_addrule($ruleset, $chain, "-j $group_chain");
- ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN")
- if $direction eq 'OUT';
- } else {
- next if $rule->{type} ne $lc_direction;
- if ($direction eq 'OUT') {
- ruleset_generate_rule($ruleset, $chain, $rule,
- { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
- } else {
- ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
- }
+ if ($rule_env eq 'host') {
+ return {
+ check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
+ };
+ } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
+ return {
+ check => ['perm', '/', [ 'Sys.Audit' ]],
+ };
+ } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
+ return {
+ check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
}
}
+
+ return undef;
}
-sub generate_venet_rules_direction {
- my ($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
+# core functions
+my $bridge_firewall_enabled = 0;
- parse_address_list($ip); # make sure we have a valid $ip list
+sub enable_bridge_firewall {
- my $lc_direction = lc($direction);
+ return if $bridge_firewall_enabled; # only once
- my $rules = $vmfw_conf->{rules};
+ PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
+ PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
- my $options = $vmfw_conf->{options};
- my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
+ # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
+ PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
- my $chain = "venet0-$vmid-$direction";
+ $bridge_firewall_enabled = 1;
+}
- ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
+sub iptables_restore_cmdlist {
+ my ($cmdlist) = @_;
- ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $chain, 'venet', $direction);
+ run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
+}
- # implement policy
- my $policy;
+sub ip6tables_restore_cmdlist {
+ my ($cmdlist) = @_;
- if ($direction eq 'OUT') {
- $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
- } else {
- $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
- }
+ run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
+}
- my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
- ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
+sub ipset_restore_cmdlist {
+ my ($cmdlist) = @_;
- # plug into FORWARD, INPUT and OUTPUT chain
- if ($direction eq 'OUT') {
- ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
- action => $chain,
- source => $ip,
- iface_in => 'venet0'});
-
- ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
- action => $chain,
- source => $ip,
- iface_in => 'venet0'});
- } else {
- ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
- action => $chain,
- dest => $ip,
- iface_out => 'venet0'});
+ run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
+}
- ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
- action => $chain,
- dest => $ip,
- iface_out => 'venet0'});
- }
+sub ebtables_restore_cmdlist {
+ my ($cmdlist) = @_;
+
+ run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
}
-sub generate_tap_rules_direction {
- my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
+sub iptables_get_chains {
+ my ($iptablescmd) = @_;
- my $lc_direction = lc($direction);
+ $iptablescmd = "iptables" if !$iptablescmd;
- my $rules = $vmfw_conf->{rules};
+ my $res = {};
- my $options = $vmfw_conf->{options};
- my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
+ # check what chains we want to track
+ my $is_pvefw_chain = sub {
+ my $name = shift;
- my $tapchain = "$iface-$direction";
+ return 1 if $name =~ m/^PVEFW-\S+$/;
- ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
+ return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
- ruleset_generate_vm_rules($ruleset, $rules, $groups_conf, $tapchain, $netid, $direction);
+ return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
- # implement policy
- my $policy;
+ return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
+ return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
- if ($direction eq 'OUT') {
- $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
- } else {
- $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
- }
+ return undef;
+ };
- my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
- ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
+ my $table = '';
- # plug the tap chain to bridge chain
- if ($direction eq 'IN') {
- ruleset_insertrule($ruleset, "$bridge-IN",
- "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
- } else {
- ruleset_insertrule($ruleset, "$bridge-OUT",
- "-m physdev --physdev-in $iface -j $tapchain");
- }
-}
+ my $hooks = {};
-sub enable_host_firewall {
- my ($ruleset, $hostfw_conf, $groups_conf) = @_;
+ my $parser = sub {
+ my $line = shift;
- # fixme: allow security groups
+ return if $line =~ m/^#/;
+ return if $line =~ m/^\s*$/;
- my $options = $hostfw_conf->{options};
- my $rules = $hostfw_conf->{rules};
+ if ($line =~ m/^\*(\S+)$/) {
+ $table = $1;
+ return;
+ }
- # host inbound firewall
- my $chain = "PVEFW-HOST-IN";
- ruleset_create_chain($ruleset, $chain);
+ return if $table ne 'filter';
- my $loglevel = get_option_log_level($options, "log_level_in");
+ if ($line =~ m/^:(\S+)\s/) {
+ my $chain = $1;
+ return if !&$is_pvefw_chain($chain);
+ $res->{$chain} = "unknown";
+ } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
+ my ($chain, $sig) = ($1, $2);
+ return if !&$is_pvefw_chain($chain);
+ $res->{$chain} = $sig;
+ } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
+ $hooks->{$1} = 1;
+ } else {
+ # simply ignore the rest
+ return;
+ }
+ };
- if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
- }
+ run_command("/sbin/$iptablescmd-save", outfunc => $parser);
- if ($options->{tcpflags}) {
- ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
- }
+ return wantarray ? ($res, $hooks) : $res;
+}
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
+sub iptables_chain_digest {
+ my ($rules) = @_;
+ my $digest = Digest::SHA->new('sha1');
+ foreach my $rule (@$rules) { # order is important
+ $digest->add($rule);
+ }
+ return $digest->b64digest;
+}
- # we use RETURN because we need to check also tap rules
- my $accept_action = 'RETURN';
+sub ipset_chain_digest {
+ my ($rules) = @_;
- foreach my $rule (@$rules) {
- next if $rule->{type} ne 'in';
- ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
+ my $digest = Digest::SHA->new('sha1');
+ foreach my $rule (sort @$rules) { # note: sorted
+ $digest->add($rule);
}
+ return $digest->b64digest;
+}
- # implement input policy
- my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
- ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
+sub ipset_get_chains {
- # host outbound firewall
- $chain = "PVEFW-HOST-OUT";
- ruleset_create_chain($ruleset, $chain);
+ my $res = {};
+ my $chains = {};
- $loglevel = get_option_log_level($options, "log_level_out");
+ my $parser = sub {
+ my $line = shift;
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
- ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
- ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
+ return if $line =~ m/^#/;
+ return if $line =~ m/^\s*$/;
+ if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
+ my $chain = $1;
+ $line =~ s/\s+$//; # delete trailing white space
+ push @{$chains->{$chain}}, $line;
+ } else {
+ # simply ignore the rest
+ return;
+ }
+ };
- # we use RETURN because we may want to check other thigs later
- $accept_action = 'RETURN';
+ run_command("/sbin/ipset save", outfunc => $parser);
- foreach my $rule (@$rules) {
- next if $rule->{type} ne 'out';
- ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
+ # compute digest for each chain
+ foreach my $chain (keys %$chains) {
+ $res->{$chain} = ipset_chain_digest($chains->{$chain});
}
- # implement output policy
- $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
- ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
-
- ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
- ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
+ return $res;
}
-sub generate_group_rules {
- my ($ruleset, $groups_conf, $group) = @_;
- die "no such security group '$group'\n" if !$groups_conf->{rules}->{$group};
+sub ebtables_get_chains {
- my $rules = $groups_conf->{rules}->{$group};
+ my $res = {};
+ my $chains = {};
- my $chain = "GROUP-${group}-IN";
+ my $parser = sub {
+ my $line = shift;
+ return if $line =~ m/^#/;
+ return if $line =~ m/^\s*$/;
+ if ($line =~ m/^:(\S+)\s\S+$/) {
+ # Make sure we know chains exist even if they're empty.
+ $chains->{$1} //= [];
+ } elsif ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
+ my $chain = $1;
+ $line =~ s/\s+$//;
+ push @{$chains->{$chain}}, $line;
+ } elsif ($line =~ m/^(?:\S+)\s(tap\d+i\d+-(:?IN|OUT))\s(?:\S+).*/) {
+ my $chain = $1;
+ $line =~ s/\s+$//;
+ push @{$chains->{$chain}}, $line;
+ } elsif ($line =~ m/^(?:\S+)\s(veth\d+i\d+-(:?IN|OUT))\s(?:\S+).*/) {
+ my $chain = $1;
+ $line =~ s/\s+$//;
+ push @{$chains->{$chain}}, $line;
+ } else {
+ # simply ignore the rest
+ return;
+ }
+ };
- ruleset_create_chain($ruleset, $chain);
+ run_command("/sbin/ebtables-save", outfunc => $parser);
- foreach my $rule (@$rules) {
- next if $rule->{type} ne 'in';
- ruleset_generate_rule($ruleset, $chain, $rule, { REJECT => "PVEFW-reject" });
+ # compute digest for each chain
+ foreach my $chain (keys %$chains) {
+ $res->{$chain} = iptables_chain_digest($chains->{$chain});
}
+ return $res;
+}
- $chain = "GROUP-${group}-OUT";
+# substitude action of rule according to action hash
+sub rule_substitude_action {
+ my ($rule, $actions) = @_;
+
+ if (my $action = $rule->{action}) {
+ $rule->{action} = $actions->{$action} if defined($actions->{$action});
+ }
+}
+
+# generate a src or dst match
+# $dir(ection) is either d or s
+sub ipt_gen_src_or_dst_match {
+ my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
+
+ my $srcdst;
+ if ($dir eq 's') {
+ $srcdst = "src";
+ } elsif ($dir eq 'd') {
+ $srcdst = "dst";
+ } else {
+ die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
+ }
+
+ my $match;
+ if ($adr =~ m/^\+/) {
+ if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
+ my $name = $1;
+ my $ipset_chain;
+ if ($fw_conf && $fw_conf->{ipset}->{$name}) {
+ $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
+ } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
+ $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
+ } else {
+ die "no such ipset '$name'\n";
+ }
+ $match = "-m set --match-set ${ipset_chain} ${srcdst}";
+ } else {
+ die "invalid security group name '$adr'\n";
+ }
+ } elsif ($adr =~ m/^${ip_alias_pattern}$/){
+ my $alias = lc($adr);
+ my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
+ $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
+ die "no such alias '$adr'\n" if !$e;
+ $match = "-${dir} $e->{cidr}";
+ } elsif ($adr =~ m/\-/){
+ $match = "-m iprange --${srcdst}-range $adr";
+ } else {
+ $match = "-${dir} $adr";
+ }
+
+ return $match;
+}
+
+# convert a %rule to an array of iptables commands
+sub ipt_rule_to_cmds {
+ my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
+
+ die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
+
+ my @match = ();
+
+ if (defined $rule->{match}) {
+ push @match, $rule->{match};
+ } else {
+ push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
+ push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
+
+ if ($rule->{source}) {
+ push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
+ }
+ if ($rule->{dest}) {
+ push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
+ }
+
+ if (my $proto = $rule->{proto}) {
+ push @match, "-p $proto";
+
+ my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
+ my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
+
+ my $add_dport = sub {
+ return if !$rule->{dport};
+
+ if ($proto eq 'icmp') {
+ # Note: we use dport to store --icmp-type
+ die "unknown icmp-type '$rule->{dport}'\n"
+ if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
+ push @match, "-m icmp --icmp-type $rule->{dport}";
+ } elsif ($proto eq 'icmpv6') {
+ # Note: we use dport to store --icmpv6-type
+ die "unknown icmpv6-type '$rule->{dport}'\n"
+ if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
+ push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
+ } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
+ die "protocol $proto does not have ports\n";
+ } elsif ($multidport) {
+ push @match, "--match multiport", "--dports $rule->{dport}";
+ } else {
+ push @match, "--dport $rule->{dport}";
+ }
+ };
+
+ my $add_sport = sub {
+ return if !$rule->{sport};
+
+ die "protocol $proto does not have ports\n"
+ if !$PROTOCOLS_WITH_PORTS->{$proto};
+ if ($multisport) {
+ push @match, "--match multiport", "--sports $rule->{sport}";
+ } else {
+ push @match, "--sport $rule->{sport}";
+ }
+ };
+
+ # order matters - single port before multiport!
+ $add_dport->() if $multisport;
+ $add_sport->();
+ $add_dport->() if !$multisport;
+ } elsif ($rule->{dport} || $rule->{sport}) {
+ die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
+ die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
+ }
+
+ push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
+ }
+ my $matchstr = scalar(@match) ? join(' ', @match) : "";
+
+ my $targetstr;
+ if (defined $rule->{target}) {
+ $targetstr = $rule->{target};
+ } else {
+ my $action = (defined $rule->{action}) ? $rule->{action} : "";
+ my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
+ $targetstr = ($goto) ? "-g $action" : "-j $action";
+ }
+
+ my @iptcmds;
+ if (defined $rule->{log} && $rule->{log}) {
+ my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $rule->{log});
+ push @iptcmds, "-A $chain $matchstr $logaction";
+ }
+ push @iptcmds, "-A $chain $matchstr $targetstr";
+ return @iptcmds;
+}
+
+sub ruleset_generate_rule {
+ my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
+
+ my $rules;
+
+ if ($rule->{macro}) {
+ $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
+ } else {
+ $rules = [ $rule ];
+ }
+
+ # update all or nothing
+ my @ipt_rule_cmds;
+ foreach my $r (@$rules) {
+ push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf);
+ }
+ foreach my $c (@ipt_rule_cmds) {
+ ruleset_add_ipt_cmd($ruleset, $chain, $c);
+ }
+}
+
+sub ruleset_create_chain {
+ my ($ruleset, $chain) = @_;
+
+ die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
+ die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
+
+ die "chain '$chain' already exists\n" if $ruleset->{$chain};
+
+ $ruleset->{$chain} = [];
+}
+
+sub ruleset_chain_exist {
+ my ($ruleset, $chain) = @_;
+
+ return $ruleset->{$chain} ? 1 : undef;
+}
+
+# add an iptables command (like generated by ipt_rule_to_cmds) to a chain
+sub ruleset_add_ipt_cmd {
+ my ($ruleset, $chain, $iptcmd) = @_;
+
+ die "no such chain '$chain'\n" if !$ruleset->{$chain};
+
+ push @{$ruleset->{$chain}}, $iptcmd;
+}
+
+sub ruleset_addrule {
+ my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
+
+ die "no such chain '$chain'\n" if !$ruleset->{$chain};
+
+ if (defined($log) && $log) {
+ my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
+ push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
+ }
+ # for stable ebtables digests avoid double-spaces to match ebtables-save output
+ $match .= ' ' if length($match);
+ push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
+}
+
+sub ruleset_insertrule {
+ my ($ruleset, $chain, $match, $action, $log) = @_;
+
+ die "no such chain '$chain'\n" if !$ruleset->{$chain};
+
+ unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
+}
+
+sub get_log_rule_base {
+ my ($chain, $vmid, $msg, $loglevel) = @_;
+
+ $vmid = 0 if !defined($vmid);
+ $msg = "" if !defined($msg);
+
+ # Note: we use special format for prefix to pass further
+ # info to log daemon (VMID, LOGLEVEL and CHAIN)
+
+ return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
+}
+
+sub ruleset_add_chain_policy {
+ my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
+
+ if ($policy eq 'ACCEPT') {
+
+ my $rule = { action => 'ACCEPT' };
+ rule_substitude_action($rule, { ACCEPT => $accept_action});
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
+
+ } elsif ($policy eq 'DROP') {
+
+ ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
+
+ ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
+ } elsif ($policy eq 'REJECT') {
+ ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
+
+ ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy:", $vmid);
+ } else {
+ # should not happen
+ die "internal error: unknown policy '$policy'";
+ }
+}
+
+sub ruleset_chain_add_ndp {
+ my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
+ return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
+
+ ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
+ if ($direction ne 'OUT' || $options->{radv}) {
+ ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
+ }
+ ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
+ ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
+}
+
+sub ruleset_chain_add_conn_filters {
+ my ($ruleset, $chain, $accept) = @_;
+
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
+}
+
+sub ruleset_chain_add_input_filters {
+ my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
+
+ if ($cluster_conf->{ipset}->{blacklist}){
+ if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
+ ruleset_create_chain($ruleset, "PVEFW-blacklist");
+ ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
+ }
+ my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
+ ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
+ }
+
+ if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
+ if ($ipversion == 4) {
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
+ }
+ }
+
+ if ($options->{tcpflags}) {
+ ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
+ }
+}
+
+sub ruleset_create_vm_chain {
+ my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
ruleset_create_chain($ruleset, $chain);
- ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
+ my $accept = generate_nfqueue($options);
+
+ if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
+ if ($ipversion == 4) {
+ if ($direction eq 'OUT') {
+ ruleset_generate_rule($ruleset, $chain, $ipversion,
+ { action => 'PVEFW-SET-ACCEPT-MARK',
+ proto => 'udp', sport => 68, dport => 67 });
+ } else {
+ ruleset_generate_rule($ruleset, $chain, $ipversion,
+ { action => 'ACCEPT',
+ proto => 'udp', sport => 67, dport => 68 });
+ }
+ } elsif ($ipversion == 6) {
+ if ($direction eq 'OUT') {
+ ruleset_generate_rule($ruleset, $chain, $ipversion,
+ { action => 'PVEFW-SET-ACCEPT-MARK',
+ proto => 'udp', sport => 546, dport => 547 });
+ } else {
+ ruleset_generate_rule($ruleset, $chain, $ipversion,
+ { action => 'ACCEPT',
+ proto => 'udp', sport => 547, dport => 546 });
+ }
+ }
+
+ }
+
+ if ($direction eq 'OUT') {
+ if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
+ ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
+ }
+ if ($ipversion == 6 && !$options->{radv}) {
+ ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
+ }
+ if ($ipfilter_ipset) {
+ ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
+ }
+ ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
+ }
+
+ my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
+ ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
+}
+
+sub ruleset_add_group_rule {
+ my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
+
+ my $group = $rule->{action};
+ my $group_chain = "GROUP-$group-$direction";
+ if(!ruleset_chain_exist($ruleset, $group_chain)){
+ generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
+ }
+
+ if ($direction eq 'OUT' && $rule->{iface_out}) {
+ ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
+ } elsif ($direction eq 'IN' && $rule->{iface_in}) {
+ ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
+ } else {
+ ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
+ }
+
+ ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
+}
+
+sub ruleset_generate_vm_rules {
+ my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
+
+ my $lc_direction = lc($direction);
+
+ my $in_accept = generate_nfqueue($options);
foreach my $rule (@$rules) {
- next if $rule->{type} ne 'out';
- # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
- # check also other tap rules later
- ruleset_generate_rule($ruleset, $chain, $rule,
- { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
+ next if $rule->{iface} && $rule->{iface} ne $netid;
+ next if !$rule->{enable} || $rule->{errors};
+ next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
+
+ if ($rule->{type} eq 'group') {
+ ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
+ $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
+ } else {
+ next if $rule->{type} ne $lc_direction;
+ eval {
+ if ($direction eq 'OUT') {
+ rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
+ } else {
+ rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
+ }
+ };
+ warn $@ if $@;
+ }
}
}
-my $MAX_NETS = 32;
-my $valid_netdev_names = {};
-for (my $i = 0; $i < $MAX_NETS; $i++) {
- $valid_netdev_names->{"net$i"} = 1;
+sub generate_nfqueue {
+ my ($options) = @_;
+
+ if ($options->{ips}) {
+ my $action = "NFQUEUE";
+ if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
+ if (defined($3) && defined($1)) {
+ $action .= " --queue-balance $1:$3";
+ } elsif (defined($1)) {
+ $action .= " --queue-num $1";
+ }
+ }
+ $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
+ return $action;
+ } else {
+ return "ACCEPT";
+ }
+}
+
+sub ruleset_generate_vm_ipsrules {
+ my ($ruleset, $options, $direction, $iface) = @_;
+
+ if ($options->{ips} && $direction eq 'IN') {
+ my $nfqueue = generate_nfqueue($options);
+
+ if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
+ ruleset_create_chain($ruleset, "PVEFW-IPS");
+ }
+
+ ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
+ }
+}
+
+sub generate_tap_rules_direction {
+ my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
+
+ my $lc_direction = lc($direction);
+
+ my $rules = $vmfw_conf->{rules};
+
+ my $options = $vmfw_conf->{options};
+ my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
+
+ my $tapchain = "$iface-$direction";
+
+ my $ipfilter_name = compute_ipfilter_ipset_name($netid);
+ my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
+ if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
+
+ # create chain with mac and ip filter
+ ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
+
+ if ($options->{enable}) {
+ ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
+
+ ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
+
+ # implement policy
+ my $policy;
+
+ if ($direction eq 'OUT') {
+ $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
+ } else {
+ $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
+ }
+
+ my $accept = generate_nfqueue($options);
+ my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
+ ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
+ } else {
+ my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
+ ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
+ }
+
+ # plug the tap chain to bridge chain
+ if ($direction eq 'IN') {
+ ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
+ "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
+ } else {
+ ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
+ "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
+ }
+}
+
+sub enable_host_firewall {
+ my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
+
+ my $options = $hostfw_conf->{options};
+ my $cluster_options = $cluster_conf->{options};
+ my $rules = $hostfw_conf->{rules};
+ my $cluster_rules = $cluster_conf->{rules};
+
+ # host inbound firewall
+ my $chain = "PVEFW-HOST-IN";
+ ruleset_create_chain($ruleset, $chain);
+
+ my $loglevel = get_option_log_level($options, "log_level_in");
+
+ ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
+
+ ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
+ ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
+ ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
+
+ # we use RETURN because we need to check also tap rules
+ my $accept_action = 'RETURN';
+
+ ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
+
+ # add host rules first, so that cluster wide rules can be overwritten
+ foreach my $rule (@$rules, @$cluster_rules) {
+ next if !$rule->{enable} || $rule->{errors};
+ next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
+
+ $rule->{iface_in} = $rule->{iface} if $rule->{iface};
+
+ eval {
+ if ($rule->{type} eq 'group') {
+ ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
+ } elsif ($rule->{type} eq 'in') {
+ rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
+ }
+ };
+ warn $@ if $@;
+ delete $rule->{iface_in};
+ }
+
+ # allow standard traffic for management ipset (includes cluster network)
+ my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
+ my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
+ ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action"); # PVE API
+ ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
+ ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
+ ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action"); # SSH
+
+ my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
+ my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
+
+ # corosync
+ if ($localnet && ($ipversion == $localnet_ver)) {
+ my $corosync_rule = "-p udp --dport 5404:5405";
+ ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
+ ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
+ }
+
+ # implement input policy
+ my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
+ ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
+
+ # host outbound firewall
+ $chain = "PVEFW-HOST-OUT";
+ ruleset_create_chain($ruleset, $chain);
+
+ $loglevel = get_option_log_level($options, "log_level_out");
+
+ ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
+
+ ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
+
+ # we use RETURN because we may want to check other thigs later
+ $accept_action = 'RETURN';
+ ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
+
+ ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
+
+ # add host rules first, so that cluster wide rules can be overwritten
+ foreach my $rule (@$rules, @$cluster_rules) {
+ next if !$rule->{enable} || $rule->{errors};
+ next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
+
+ $rule->{iface_out} = $rule->{iface} if $rule->{iface};
+ eval {
+ if ($rule->{type} eq 'group') {
+ ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
+ } elsif ($rule->{type} eq 'out') {
+ rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
+ }
+ };
+ warn $@ if $@;
+ delete $rule->{iface_out};
+ }
+
+ # allow standard traffic on cluster network
+ if ($localnet && ($ipversion == $localnet_ver)) {
+ ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action"); # PVE API
+ ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action"); # SSH
+ ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action"); # PVE VNC Console
+ ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action"); # SPICE Proxy
+
+ my $corosync_rule = "-p udp --dport 5404:5405";
+ ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
+ ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
+ }
+
+ # implement output policy
+ $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
+ ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
+
+ ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
+ ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
+}
+
+sub generate_group_rules {
+ my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
+
+ my $rules = $cluster_conf->{groups}->{$group};
+
+ if (!$rules) {
+ warn "no such security group '$group'\n";
+ $rules = []; # create empty chain
+ }
+
+ my $chain = "GROUP-${group}-IN";
+
+ ruleset_create_chain($ruleset, $chain);
+ ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
+
+ foreach my $rule (@$rules) {
+ next if $rule->{type} ne 'in';
+ next if !$rule->{enable} || $rule->{errors};
+ next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
+ rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
+ }
+
+ $chain = "GROUP-${group}-OUT";
+
+ ruleset_create_chain($ruleset, $chain);
+ ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
+
+ foreach my $rule (@$rules) {
+ next if $rule->{type} ne 'out';
+ next if !$rule->{enable} || $rule->{errors};
+ next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
+ # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
+ # check also other tap rules later
+ rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
+ }
+}
+
+my $MAX_NETS = 32;
+my $valid_netdev_names = {};
+for (my $i = 0; $i < $MAX_NETS; $i++) {
+ $valid_netdev_names->{"net$i"} = 1;
+}
+
+sub get_mark_values {
+ my ($value, $mask) = @_;
+ $value = hex($value) if $value =~ /^0x/;
+ $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
+ $mask = 0xffffffff if !defined($mask);
+ return ($value, $mask);
+}
+
+sub parse_fw_rule {
+ my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
+
+ my $orig_line = $line;
+
+ my $rule = {};
+
+ # we can add single line comments to the end of the rule
+ if ($line =~ s/#\s*(.*?)\s*$//) {
+ $rule->{comment} = decode('utf8', $1);
+ }
+
+ # we can disable a rule when prefixed with '|'
+
+ $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
+
+ $line =~ s/^(\S+)\s+(\S+)\s*// ||
+ die "unable to parse rule: $line\n";
+
+ $rule->{type} = lc($1);
+ $rule->{action} = $2;
+
+ if ($rule->{type} eq 'in' || $rule->{type} eq 'out') {
+ if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
+ $rule->{macro} = $1;
+ $rule->{action} = $2;
+ }
+ }
+
+ while (length($line)) {
+ if ($line =~ s/^-i (\S+)\s*//) {
+ $rule->{iface} = $1;
+ next;
+ }
+
+ last if $rule->{type} eq 'group';
+
+ if ($line =~ s/^-p (\S+)\s*//) {
+ $rule->{proto} = $1;
+ next;
+ }
+
+ if ($line =~ s/^-dport (\S+)\s*//) {
+ $rule->{dport} = $1;
+ next;
+ }
+
+ if ($line =~ s/^-sport (\S+)\s*//) {
+ $rule->{sport} = $1;
+ next;
+ }
+ if ($line =~ s/^-source (\S+)\s*//) {
+ $rule->{source} = $1;
+ next;
+ }
+ if ($line =~ s/^-dest (\S+)\s*//) {
+ $rule->{dest} = $1;
+ next;
+ }
+
+ last;
+ }
+
+ die "unable to parse rule parameters: $line\n" if length($line);
+
+ $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
+ if ($rule->{errors}) {
+ # The verbose flag really means we're running from the CLI and want
+ # output on the console - in the other case we really want such errors
+ # to go into the syslog instead.
+ my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
+ $log->("$prefix - errors in rule parameters: $orig_line\n");
+ foreach my $p (keys %{$rule->{errors}}) {
+ $log->(" $p: $rule->{errors}->{$p}\n");
+ }
+ }
+
+ return $rule;
+}
+
+sub verify_ethertype {
+ my ($value) = @_;
+ my $types = get_etc_ethertypes();
+ die "unknown ethernet protocol type: $value\n"
+ if !defined($types->{byname}->{$value}) &&
+ !defined($types->{byid}->{$value});
+}
+
+sub parse_vmfw_option {
+ my ($line) = @_;
+
+ my ($opt, $value);
+
+ my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
+
+ if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
+ $opt = lc($1);
+ $value = int($2);
+ } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
+ $opt = lc($1);
+ $value = $2 ? lc($3) : '';
+ } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
+ $opt = lc($1);
+ $value = uc($3);
+ } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
+ $opt = lc($1);
+ $value = $2;
+ } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
+ $opt = lc($1);
+ $value = $2;
+ verify_ethertype($_) foreach split(/\s*,\s*/, $value);
+ } else {
+ die "can't parse option '$line'\n"
+ }
+
+ return ($opt, $value);
+}
+
+sub parse_hostfw_option {
+ my ($line) = @_;
+
+ my ($opt, $value);
+
+ my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
+
+ if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
+ $opt = lc($1);
+ $value = int($2);
+ } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
+ $opt = lc($1);
+ $value = $2 ? lc($3) : '';
+ } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
+ $opt = lc($1);
+ $value = int($2);
+ } else {
+ die "can't parse option '$line'\n"
+ }
+
+ return ($opt, $value);
+}
+
+sub parse_clusterfw_option {
+ my ($line) = @_;
+
+ my ($opt, $value);
+
+ if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
+ $opt = lc($1);
+ $value = int($2);
+ if (($value > 1) && ((time() - $value) > 60)) {
+ $value = 0
+ }
+ } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
+ $opt = lc($1);
+ $value = uc($3);
+ } else {
+ die "can't parse option '$line'\n"
+ }
+
+ return ($opt, $value);
+}
+
+sub resolve_alias {
+ my ($clusterfw_conf, $fw_conf, $cidr) = @_;
+
+ my $alias = lc($cidr);
+ my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
+ $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
+
+ die "no such alias '$cidr'\n" if !$e;;
+
+ return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
+}
+
+sub parse_ip_or_cidr {
+ my ($cidr) = @_;
+
+ my $ipversion;
+
+ if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
+ $cidr =~ s|/128$||;
+ $ipversion = 6;
+ } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
+ $cidr =~ s|/32$||;
+ $ipversion = 4;
+ } else {
+ die "value does not look like a valid IP address or CIDR network\n";
+ }
+
+ return wantarray ? ($cidr, $ipversion) : $cidr;
+}
+
+sub parse_alias {
+ my ($line) = @_;
+
+ # we can add single line comments to the end of the line
+ my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
+
+ if ($line =~ m/^(\S+)\s(\S+)$/) {
+ my ($name, $cidr) = ($1, $2);
+ my $ipversion;
+
+ ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
+
+ my $data = {
+ name => $name,
+ cidr => $cidr,
+ ipversion => $ipversion,
+ };
+ $data->{comment} = $comment if $comment;
+ return $data;
+ }
+
+ return undef;
+}
+
+sub generic_fw_config_parser {
+ my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
+
+ my $section;
+ my $group;
+
+ my $res = $empty_conf;
+
+ while (defined(my $line = <$fh>)) {
+ next if $line =~ m/^#/;
+ next if $line =~ m/^\s*$/;
+
+ chomp $line;
+
+ my $linenr = $fh->input_line_number();
+ my $prefix = "$filename (line $linenr)";
+
+ if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
+ $section = 'options';
+ next;
+ }
+
+ if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
+ $section = 'aliases';
+ next;
+ }
+
+ if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
+ $section = 'groups';
+ $group = lc($1);
+ my $comment = $2;
+ eval {
+ die "security group name too long\n" if length($group) > $max_group_name_length;
+ die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
+ };
+ if (my $err = $@) {
+ ($section, $group, $comment) = undef;
+ warn "$prefix: $err";
+ next;
+ }
+
+ $res->{$section}->{$group} = [];
+ $res->{group_comments}->{$group} = decode('utf8', $comment)
+ if $comment;
+ next;
+ }
+
+ if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
+ $section = 'rules';
+ next;
+ }
+
+ if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
+ $section = 'ipset';
+ $group = lc($1);
+ my $comment = $2;
+ eval {
+ die "ipset name too long\n" if length($group) > $max_ipset_name_length;
+ die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
+ };
+ if (my $err = $@) {
+ ($section, $group, $comment) = undef;
+ warn "$prefix: $err";
+ next;
+ }
+
+ $res->{$section}->{$group} = [];
+ $res->{ipset_comments}->{$group} = decode('utf8', $comment)
+ if $comment;
+ next;
+ }
+
+ if (!$section) {
+ warn "$prefix: skip line - no section\n";
+ next;
+ }
+
+ if ($section eq 'options') {
+ eval {
+ my ($opt, $value);
+ if ($rule_env eq 'cluster') {
+ ($opt, $value) = parse_clusterfw_option($line);
+ } elsif ($rule_env eq 'host') {
+ ($opt, $value) = parse_hostfw_option($line);
+ } else {
+ ($opt, $value) = parse_vmfw_option($line);
+ }
+ $res->{options}->{$opt} = $value;
+ };
+ warn "$prefix: $@" if $@;
+ } elsif ($section eq 'aliases') {
+ eval {
+ my $data = parse_alias($line);
+ $res->{aliases}->{lc($data->{name})} = $data;
+ };
+ warn "$prefix: $@" if $@;
+ } elsif ($section eq 'rules') {
+ my $rule;
+ eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
+ if (my $err = $@) {
+ warn "$prefix: $err";
+ next;
+ }
+ push @{$res->{$section}}, $rule;
+ } elsif ($section eq 'groups') {
+ my $rule;
+ eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
+ if (my $err = $@) {
+ warn "$prefix: $err";
+ next;
+ }
+ push @{$res->{$section}->{$group}}, $rule;
+ } elsif ($section eq 'ipset') {
+ # we can add single line comments to the end of the rule
+ my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
+
+ $line =~ m/^(\!)?\s*(\S+)\s*$/;
+ my $nomatch = $1;
+ my $cidr = $2;
+ my $errors;
+
+ if ($nomatch && !$feature_ipset_nomatch) {
+ $errors->{nomatch} = "nomatch not supported by kernel";
+ }
+
+ eval {
+ if ($cidr =~ m/^${ip_alias_pattern}$/) {
+ resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
+ } else {
+ $cidr = parse_ip_or_cidr($cidr);
+ }
+ };
+ if (my $err = $@) {
+ chomp $err;
+ $errors->{cidr} = $err;
+ }
+
+ if ($cidr =~ m!/0+$!) {
+ $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
+ }
+
+ my $entry = { cidr => $cidr };
+ $entry->{nomatch} = 1 if $nomatch;
+ $entry->{comment} = $comment if $comment;
+ $entry->{errors} = $errors if $errors;
+
+ if ($verbose && $errors) {
+ warn "$prefix - errors in ipset '$group': $line\n";
+ foreach my $p (keys %{$errors}) {
+ warn " $p: $errors->{$p}\n";
+ }
+ }
+
+ push @{$res->{$section}->{$group}}, $entry;
+ } else {
+ warn "$prefix: skip line - unknown section\n";
+ next;
+ }
+ }
+
+ return $res;
+}
+
+sub parse_hostfw_config {
+ my ($filename, $fh, $cluster_conf, $verbose) = @_;
+
+ my $empty_conf = { rules => [], options => {}};
+
+ return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
+}
+
+sub parse_vmfw_config {
+ my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
+
+ my $empty_conf = {
+ rules => [],
+ options => {},
+ aliases => {},
+ ipset => {} ,
+ ipset_comments => {},
+ };
+
+ return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
+}
+
+sub parse_clusterfw_config {
+ my ($filename, $fh, $verbose) = @_;
+
+ my $section;
+ my $group;
+
+ my $empty_conf = {
+ rules => [],
+ options => {},
+ aliases => {},
+ groups => {},
+ group_comments => {},
+ ipset => {} ,
+ ipset_comments => {},
+ };
+
+ return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
+}
+
+sub run_locked {
+ my ($code, @param) = @_;
+
+ my $timeout = 10;
+
+ my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
+
+ die $@ if $@;
+
+ return $res;
+}
+
+sub read_local_vm_config {
+
+ my $qemu = {};
+ my $lxc = {};
+
+ my $vmdata = { qemu => $qemu, lxc => $lxc };
+
+ my $vmlist = PVE::Cluster::get_vmlist();
+ return $vmdata if !$vmlist || !$vmlist->{ids};
+ my $ids = $vmlist->{ids};
+
+ foreach my $vmid (keys %$ids) {
+ next if !$vmid; # skip VE0
+ my $d = $ids->{$vmid};
+ next if !$d->{node} || $d->{node} ne $nodename;
+ next if !$d->{type};
+ if ($d->{type} eq 'qemu') {
+ if ($have_qemu_server) {
+ my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
+ if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
+ $qemu->{$vmid} = $conf;
+ }
+ }
+ } elsif ($d->{type} eq 'lxc') {
+ if ($have_lxc) {
+ my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
+ if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
+ $lxc->{$vmid} = $conf;
+ }
+ }
+ }
+ }
+
+ return $vmdata;
+};
+
+sub load_vmfw_conf {
+ my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
+
+ my $vmfw_conf = {};
+
+ $dir = $pvefw_conf_dir if !defined($dir);
+
+ my $filename = "$dir/$vmid.fw";
+ if (my $fh = IO::File->new($filename, O_RDONLY)) {
+ $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
+ $vmfw_conf->{vmid} = $vmid;
+ }
+
+ return $vmfw_conf;
}
-sub parse_fw_rule {
- my ($line, $need_iface, $allow_groups) = @_;
+my $format_rules = sub {
+ my ($rules, $allow_iface) = @_;
- my $macros = get_firewall_macros();
- my $protocols = get_etc_protocols();
+ my $raw = '';
- my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
+ foreach my $rule (@$rules) {
+ if ($rule->{type} eq 'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
+ $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
+ $raw .= uc($rule->{type});
+ if ($rule->{macro}) {
+ $raw .= " $rule->{macro}($rule->{action})";
+ } else {
+ $raw .= " " . $rule->{action};
+ }
+ if ($allow_iface && $rule->{iface}) {
+ $raw .= " -i $rule->{iface}";
+ }
- # we can add single line comments to the end of the rule
- my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
+ if ($rule->{type} ne 'group') {
+ $raw .= " -source $rule->{source}" if $rule->{source};
+ $raw .= " -dest $rule->{dest}" if $rule->{dest};
+ $raw .= " -p $rule->{proto}" if $rule->{proto};
+ $raw .= " -dport $rule->{dport}" if $rule->{dport};
+ $raw .= " -sport $rule->{sport}" if $rule->{sport};
+ }
- # we can disable a rule when prefixed with '|'
- my $enable = 1;
+ $raw .= " # " . encode('utf8', $rule->{comment})
+ if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
+ $raw .= "\n";
+ } else {
+ die "unknown rule type '$rule->{type}'";
+ }
+ }
- $enable = 0 if $line =~ s/^\|//;
+ return $raw;
+};
- my @data = split(/\s+/, $line);
- my $expected_elements = $need_iface ? 8 : 7;
+my $format_options = sub {
+ my ($options) = @_;
- die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
+ my $raw = '';
- if ($need_iface) {
- ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
- } else {
- ($type, $action, $source, $dest, $proto, $dport, $sport) = @data;
+ $raw .= "[OPTIONS]\n\n";
+ foreach my $opt (keys %$options) {
+ $raw .= "$opt: $options->{$opt}\n";
}
+ $raw .= "\n";
+
+ return $raw;
+};
+
+my $format_aliases = sub {
+ my ($aliases) = @_;
- die "incomplete rule\n" if ! ($type && $action);
+ my $raw = '';
- my $macro;
- my $macro_name;
+ $raw .= "[ALIASES]\n\n";
+ foreach my $k (keys %$aliases) {
+ my $e = $aliases->{$k};
+ $raw .= "$e->{name} $e->{cidr}";
+ $raw .= " # " . encode('utf8', $e->{comment})
+ if $e->{comment} && $e->{comment} !~ m/^\s*$/;
+ $raw .= "\n";
+ }
+ $raw .= "\n";
+
+ return $raw;
+};
- $type = lc($type);
+my $format_ipsets = sub {
+ my ($fw_conf) = @_;
+
+ my $raw = '';
- if ($type eq 'in' || $type eq 'out') {
- if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
- # OK
- } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
- ($macro_name, $action) = ($1, $2);
- my $lc_macro_name = lc($macro_name);
- my $preferred_name = $pve_fw_preferred_macro_names->{$lc_macro_name};
- $macro_name = $preferred_name if $preferred_name;
- $macro = $macros->{$lc_macro_name};
- die "unknown macro '$macro_name'\n" if !$macro;
+ foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
+ if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
+ my $utf8comment = encode('utf8', $comment);
+ $raw .= "[IPSET $ipset] # $utf8comment\n\n";
} else {
- die "unknown action '$action'\n";
+ $raw .= "[IPSET $ipset]\n\n";
}
- } elsif ($type eq 'group') {
- die "wrong number of rule elements\n" if scalar(@data) != 3;
- die "groups disabled\n" if !$allow_groups;
+ my $options = $fw_conf->{ipset}->{$ipset};
- die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
- } else {
- die "unknown rule type '$type'\n";
- }
+ my $nethash = {};
+ foreach my $entry (@$options) {
+ $nethash->{$entry->{cidr}} = $entry;
+ }
- if ($need_iface) {
- $iface = undef if $iface && $iface eq '-';
- }
+ foreach my $cidr (sort keys %$nethash) {
+ my $entry = $nethash->{$cidr};
+ my $line = $entry->{nomatch} ? '!' : '';
+ $line .= $entry->{cidr};
+ $line .= " # " . encode('utf8', $entry->{comment})
+ if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
+ $raw .= "$line\n";
+ }
- $proto = undef if $proto && $proto eq '-';
- die "unknown protokol '$proto'\n" if $proto &&
- !(defined($protocols->{byname}->{$proto}) ||
- defined($protocols->{byid}->{$proto}));
+ $raw .= "\n";
+ }
- $source = undef if $source && $source eq '-';
- $dest = undef if $dest && $dest eq '-';
+ return $raw;
+};
- $dport = undef if $dport && $dport eq '-';
- $sport = undef if $sport && $sport eq '-';
+sub save_vmfw_conf {
+ my ($vmid, $vmfw_conf) = @_;
- my $nbsource = undef;
- my $nbdest = undef;
+ my $raw = '';
- $nbsource = parse_address_list($source) if $source;
- $nbdest = parse_address_list($dest) if $dest;
+ my $options = $vmfw_conf->{options};
+ $raw .= &$format_options($options) if $options && scalar(keys %$options);
- my $rules = [];
+ my $aliases = $vmfw_conf->{aliases};
+ $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
- my $param = {
- type => $type,
- enable => $enable,
- comment => $comment,
- action => $action,
- iface => $iface,
- source => $source,
- dest => $dest,
- nbsource => $nbsource,
- nbdest => $nbdest,
- proto => $proto,
- dport => $dport,
- sport => $sport,
- };
+ $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
- if ($macro) {
- foreach my $templ (@$macro) {
- my $rule = {};
- my $param_used = {};
- foreach my $k (keys %$templ) {
- my $v = $templ->{$k};
- if ($v eq 'PARAM') {
- $v = $param->{$k};
- $param_used->{$k} = 1;
- } elsif ($v eq 'DEST') {
- $v = $param->{dest};
- $param_used->{dest} = 1;
- } elsif ($v eq 'SOURCE') {
- $v = $param->{source};
- $param_used->{source} = 1;
- }
+ my $rules = $vmfw_conf->{rules} || [];
+ if ($rules && scalar(@$rules)) {
+ $raw .= "[RULES]\n\n";
+ $raw .= &$format_rules($rules, 1);
+ $raw .= "\n";
+ }
- die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
- $rule->{$k} = $v;
- }
- foreach my $k (keys %$param) {
- next if !defined($param->{$k});
- next if $param_used->{$k};
- if (defined($rule->{$k})) {
- die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
- if $rule->{$k} ne $param->{$k};
- } else {
- $rule->{$k} = $param->{$k};
- }
- }
- push @$rules, $rule;
- }
+ my $filename = "$pvefw_conf_dir/$vmid.fw";
+ if ($raw) {
+ mkdir $pvefw_conf_dir;
+ PVE::Tools::file_set_contents($filename, $raw);
} else {
- push @$rules, $param;
+ unlink $filename;
}
+}
- foreach my $rule (@$rules) {
- $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
- if defined($rule->{dport});
- $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
- if defined($rule->{sport});
- }
+sub remove_vmfw_conf {
+ my ($vmid) = @_;
- return $rules;
-}
+ my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
-sub parse_vmfw_option {
- my ($line) = @_;
+ unlink $vmfw_conffile;
+}
- my ($opt, $value);
+sub clone_vmfw_conf {
+ my ($vmid, $newid) = @_;
- my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
+ my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
+ my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
- if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
- $opt = lc($1);
- $value = int($2);
- } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
- $opt = lc($1);
- $value = $2 ? lc($3) : '';
- } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
- $opt = lc($1);
- $value = uc($3);
- } else {
- chomp $line;
- die "can't parse option '$line'\n"
+ if (-f $clonevm_conffile) {
+ unlink $clonevm_conffile;
+ }
+ if (-f $sourcevm_conffile) {
+ my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
+ PVE::Tools::file_set_contents($clonevm_conffile, $data);
}
-
- return ($opt, $value);
}
-sub parse_hostfw_option {
- my ($line) = @_;
-
- my ($opt, $value);
+sub read_vm_firewall_configs {
+ my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
- my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
+ my $vmfw_configs = {};
- if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route):\s*(0|1)\s*$/i) {
- $opt = lc($1);
- $value = int($2);
- } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
- $opt = lc($1);
- $value = $2 ? lc($3) : '';
- } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
- $opt = lc($1);
- $value = uc($3);
- } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
- $opt = lc($1);
- $value = int($2);
- } else {
- chomp $line;
- die "can't parse option '$line'\n"
+ foreach my $vmid (keys %{$vmdata->{qemu}}) {
+ my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
+ next if !$vmfw_conf->{options}; # skip if file does not exists
+ $vmfw_configs->{$vmid} = $vmfw_conf;
+ }
+ foreach my $vmid (keys %{$vmdata->{lxc}}) {
+ my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
+ next if !$vmfw_conf->{options}; # skip if file does not exists
+ $vmfw_configs->{$vmid} = $vmfw_conf;
}
- return ($opt, $value);
+ return $vmfw_configs;
}
-sub parse_vm_fw_rules {
- my ($filename, $fh) = @_;
+sub get_option_log_level {
+ my ($options, $k) = @_;
- my $res = { rules => [], options => {}};
+ my $v = $options->{$k};
+ $v = $default_log_level if !defined($v);
- my $section;
+ return undef if $v eq '' || $v eq 'nolog';
- my $digest = Digest::SHA->new('sha1');
+ $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
- while (defined(my $line = <$fh>)) {
- $digest->add($line);
+ return $v if ($v >= 0) && ($v <= 7);
- next if $line =~ m/^#/;
- next if $line =~ m/^\s*$/;
+ warn "unknown log level ($k = '$v')\n";
- my $linenr = $fh->input_line_number();
- my $prefix = "$filename (line $linenr)";
+ return undef;
+}
- if ($line =~ m/^\[(\S+)\]\s*$/i) {
- $section = lc($1);
- warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
- next;
- }
- if (!$section) {
- warn "$prefix: skip line - no section";
- next;
- }
+sub generate_std_chains {
+ my ($ruleset, $options, $ipversion) = @_;
- next if !$res->{$section}; # skip undefined section
+ my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
- if ($section eq 'options') {
- eval {
- my ($opt, $value) = parse_vmfw_option($line);
- $res->{options}->{$opt} = $value;
- };
- warn "$prefix: $@" if $@;
- next;
+ my $loglevel = get_option_log_level($options, 'smurf_log_level');
+ my $chain = 'PVEFW-smurflog';
+ if ( $std_chains->{$chain} ) {
+ foreach my $r (@{$std_chains->{$chain}}) {
+ $r->{log} = $loglevel;
}
+ }
- my $rules;
- eval { $rules = parse_fw_rule($line, 1, 1); };
- if (my $err = $@) {
- warn "$prefix: $err";
- next;
+ # same as shorewall logflags action.
+ $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
+ $chain = 'PVEFW-logflags';
+ if ( $std_chains->{$chain} ) {
+ foreach my $r (@{$std_chains->{$chain}}) {
+ $r->{log} = $loglevel;
}
+ }
- push @{$res->{$section}}, @$rules;
+ foreach my $chain (keys %$std_chains) {
+ ruleset_create_chain($ruleset, $chain);
+ foreach my $rule (@{$std_chains->{$chain}}) {
+ if (ref($rule)) {
+ ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
+ } else {
+ die "rule $rule as string - should not happen";
+ }
+ }
}
+}
- $res->{digest} = $digest->b64digest;
+sub generate_ipset_chains {
+ my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
- return $res;
-}
+ foreach my $ipset (keys %{$ipsets}) {
-sub parse_host_fw_rules {
- my ($filename, $fh) = @_;
+ my $options = $ipsets->{$ipset};
- my $res = { rules => [], options => {}};
+ if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
+ if (my $ips = $device_ips->{$1}) {
+ $options = [@$options, @$ips];
+ }
+ }
- my $section;
+ # remove duplicates
+ my $nethash = {};
+ foreach my $entry (@$options) {
+ next if $entry->{errors}; # skip entries with errors
+ eval {
+ my ($cidr, $ver);
+ if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
+ ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
+ } else {
+ ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
+ }
+ #http://backreference.org/2013/03/01/ipv6-address-normalization/
+ if ($ver == 6) {
+ # ip_compress_address takes an address only, no CIDR
+ my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
+ $cidr = lc(Net::IP::ip_compress_address($addr, 6));
+ $cidr .= $prefix_len if defined($prefix_len);
+ $cidr =~ s|/128$||;
+ } else {
+ $cidr =~ s|/32$||;
+ }
- my $digest = Digest::SHA->new('sha1');
+ $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
+ };
+ warn $@ if $@;
+ }
- while (defined(my $line = <$fh>)) {
- $digest->add($line);
+ foreach my $ipversion (4, 6) {
+ my $data = $nethash->{$ipversion};
- next if $line =~ m/^#/;
- next if $line =~ m/^\s*$/;
+ my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
- my $linenr = $fh->input_line_number();
- my $prefix = "$filename (line $linenr)";
+ my $hashsize = scalar(@$options);
+ if ($hashsize <= 64) {
+ $hashsize = 64;
+ } else {
+ $hashsize = round_powerof2($hashsize);
+ }
- if ($line =~ m/^\[(\S+)\]\s*$/i) {
- $section = lc($1);
- warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
- next;
- }
- if (!$section) {
- warn "$prefix: skip line - no section";
- next;
- }
+ my $family = $ipversion == "6" ? "inet6" : "inet";
- next if !$res->{$section}; # skip undefined section
+ $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
- if ($section eq 'options') {
- eval {
- my ($opt, $value) = parse_hostfw_option($line);
- $res->{options}->{$opt} = $value;
- };
- warn "$prefix: $@" if $@;
- next;
- }
+ foreach my $cidr (sort keys %$data) {
+ my $entry = $data->{$cidr};
- my $rules;
- eval { $rules = parse_fw_rule($line, 1, 1); };
- if (my $err = $@) {
- warn "$prefix: $err";
- next;
+ my $cmd = "add $name $cidr";
+ if ($entry->{nomatch}) {
+ if ($feature_ipset_nomatch) {
+ push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
+ } else {
+ warn "ignore !$cidr - nomatch not supported by kernel\n";
+ }
+ } else {
+ push @{$ipset_ruleset->{$name}}, $cmd;
+ }
+ }
}
-
- push @{$res->{$section}}, @$rules;
}
+}
- $res->{digest} = $digest->b64digest;
+sub round_powerof2 {
+ my ($int) = @_;
- return $res;
+ $int--;
+ $int |= $int >> $_ foreach (1,2,4,8,16);
+ return ++$int;
}
-sub parse_group_fw_rules {
- my ($filename, $fh) = @_;
+sub load_clusterfw_conf {
+ my ($filename, $verbose) = @_;
- my $section;
- my $group;
+ $filename = $clusterfw_conf_filename if !defined($filename);
- my $res = { rules => {} };
+ my $cluster_conf = {};
+ if (my $fh = IO::File->new($filename, O_RDONLY)) {
+ $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
+ }
- my $digest = Digest::SHA->new('sha1');
+ return $cluster_conf;
+}
- while (defined(my $line = <$fh>)) {
- $digest->add($line);
+sub save_clusterfw_conf {
+ my ($cluster_conf) = @_;
- next if $line =~ m/^#/;
- next if $line =~ m/^\s*$/;
+ my $raw = '';
- my $linenr = $fh->input_line_number();
- my $prefix = "$filename (line $linenr)";
+ my $options = $cluster_conf->{options};
+ $raw .= &$format_options($options) if $options && scalar(keys %$options);
- if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
- $section = 'rules';
- $group = lc($1);
- next;
- }
- if (!$section || !$group) {
- warn "$prefix: skip line - no section";
- next;
- }
+ my $aliases = $cluster_conf->{aliases};
+ $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
- my $rules;
- eval { $rules = parse_fw_rule($line, 0, 0); };
- if (my $err = $@) {
- warn "$prefix: $err";
- next;
+ $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
+
+ my $rules = $cluster_conf->{rules};
+ if ($rules && scalar(@$rules)) {
+ $raw .= "[RULES]\n\n";
+ $raw .= &$format_rules($rules, 1);
+ $raw .= "\n";
+ }
+
+ if ($cluster_conf->{groups}) {
+ foreach my $group (sort keys %{$cluster_conf->{groups}}) {
+ my $rules = $cluster_conf->{groups}->{$group};
+ if (my $comment = $cluster_conf->{group_comments}->{$group}) {
+ my $utf8comment = encode('utf8', $comment);
+ $raw .= "[group $group] # $utf8comment\n\n";
+ } else {
+ $raw .= "[group $group]\n\n";
+ }
+
+ $raw .= &$format_rules($rules, 0);
+ $raw .= "\n";
}
+ }
- push @{$res->{$section}->{$group}}, @$rules;
+ if ($raw) {
+ mkdir $pvefw_conf_dir;
+ PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
+ } else {
+ unlink $clusterfw_conf_filename;
}
+}
- $res->{digest} = $digest->b64digest;
+sub load_hostfw_conf {
+ my ($cluster_conf, $filename, $verbose) = @_;
- return $res;
+ $filename = $hostfw_conf_filename if !defined($filename);
+
+ my $hostfw_conf = {};
+ if (my $fh = IO::File->new($filename, O_RDONLY)) {
+ $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
+ }
+ return $hostfw_conf;
}
-sub run_locked {
- my ($code, @param) = @_;
+sub save_hostfw_conf {
+ my ($hostfw_conf) = @_;
- my $timeout = 10;
+ my $raw = '';
- my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
+ my $options = $hostfw_conf->{options};
+ $raw .= &$format_options($options) if $options && scalar(keys %$options);
- die $@ if $@;
+ my $rules = $hostfw_conf->{rules};
+ if ($rules && scalar(@$rules)) {
+ $raw .= "[RULES]\n\n";
+ $raw .= &$format_rules($rules, 1);
+ $raw .= "\n";
+ }
- return $res;
+ if ($raw) {
+ PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
+ } else {
+ unlink $hostfw_conf_filename;
+ }
}
-sub read_local_vm_config {
-
- my $openvz = {};
- my $qemu = {};
+sub compile {
+ my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
- my $vmdata = { openvz => $openvz, qemu => $qemu };
+ my $vmfw_configs;
- my $vmlist = PVE::Cluster::get_vmlist();
- return $vmdata if !$vmlist || !$vmlist->{ids};
- my $ids = $vmlist->{ids};
+ # fixme: once we read standard chains from config this needs to be put in test/standard cases below
+ $pve_std_chains = dclone($pve_std_chains_conf);
- foreach my $vmid (keys %$ids) {
- next if !$vmid; # skip VE0
- my $d = $ids->{$vmid};
- next if !$d->{node} || $d->{node} ne $nodename;
- next if !$d->{type};
- if ($d->{type} eq 'openvz') {
- if ($have_pve_manager) {
- my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
- if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
- $openvz->{$vmid} = $conf;
- }
- }
- } elsif ($d->{type} eq 'qemu') {
- if ($have_qemu_server) {
- my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
- if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
- $qemu->{$vmid} = $conf;
- }
- }
- }
- }
+ if ($vmdata) { # test mode
+ my $testdir = $vmdata->{testdir} || die "no test directory specified";
+ my $filename = "$testdir/cluster.fw";
+ $cluster_conf = load_clusterfw_conf($filename, $verbose);
- return $vmdata;
-};
+ $filename = "$testdir/host.fw";
+ $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
-sub load_vmfw_conf {
- my ($vmid) = @_;
+ $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
+ } else { # normal operation
+ $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
- my $vmfw_conf = {};
+ $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
- my $filename = "/etc/pve/firewall/$vmid.fw";
- if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $vmfw_conf = parse_vm_fw_rules($filename, $fh);
+ $vmdata = read_local_vm_config();
+ $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
}
- return $vmfw_conf;
-}
-
-sub read_vm_firewall_configs {
- my ($vmdata) = @_;
- my $vmfw_configs = {};
+ return ({},{},{}) if !$cluster_conf->{options}->{enable};
- foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
- my $vmfw_conf = load_vmfw_conf($vmid);
- next if !$vmfw_conf->{options}; # skip if file does not exists
- $vmfw_configs->{$vmid} = $vmfw_conf;
+ my $localnet;
+ if ($cluster_conf->{aliases}->{local_network}) {
+ $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
+ } else {
+ my $localnet_ver;
+ ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
+
+ $cluster_conf->{aliases}->{local_network} = {
+ name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
}
- return $vmfw_configs;
+ push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
+
+ my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
+ my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
+ my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
+ my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
+
+ return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
}
-sub get_option_log_level {
- my ($options, $k) = @_;
+sub compile_iptables_filter {
+ my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
- my $v = $options->{$k};
- $v = $default_log_level if !defined($v);
+ my $ruleset = {};
- return undef if $v eq '' || $v eq 'nolog';
+ ruleset_create_chain($ruleset, "PVEFW-INPUT");
+ ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
- $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
+ ruleset_create_chain($ruleset, "PVEFW-FORWARD");
- return $v if ($v >= 0) && ($v <= 7);
+ my $hostfw_options = $hostfw_conf->{options} || {};
- warn "unknown log level ($k = '$v')\n";
+ # fixme: what log level should we use here?
+ my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
- return undef;
-}
+ ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
-sub generate_std_chains {
- my ($ruleset, $options) = @_;
-
- my $loglevel = get_option_log_level($options, 'smurf_log_level');
+ ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
+ ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
- # same as shorewall smurflog.
- my $chain = 'PVEFW-smurflog';
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
- push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
- push @{$pve_std_chains->{$chain}}, "-j DROP";
+ ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
- # same as shorewall logflags action.
- $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
- $chain = 'PVEFW-logflags';
- # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
- push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
- push @{$pve_std_chains->{$chain}}, "-j DROP";
+ generate_std_chains($ruleset, $hostfw_options, $ipversion);
- foreach my $chain (keys %$pve_std_chains) {
- ruleset_create_chain($ruleset, $chain);
- foreach my $rule (@{$pve_std_chains->{$chain}}) {
- if (ref($rule)) {
- ruleset_generate_rule($ruleset, $chain, $rule);
- } else {
- ruleset_addrule($ruleset, $chain, $rule);
+ my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
+
+ if ($hostfw_enable) {
+ eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
+ warn $@ if $@; # just to be sure - should not happen
+ }
+
+ # generate firewall rules for QEMU VMs
+ foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
+ eval {
+ my $conf = $vmdata->{qemu}->{$vmid};
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ return if !$vmfw_conf;
+
+ foreach my $netid (sort keys %$conf) {
+ next if $netid !~ m/^net(\d+)$/;
+ my $net = PVE::QemuServer::parse_net($conf->{$netid});
+ next if !$net->{firewall};
+ my $iface = "tap${vmid}i$1";
+
+ my $macaddr = $net->{macaddr};
+ generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, 'IN', $ipversion);
+ generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, 'OUT', $ipversion);
}
- }
+ };
+ warn $@ if $@; # just to be sure - should not happen
}
-}
-sub save_pvefw_status {
- my ($status) = @_;
+ # generate firewall rules for LXC containers
+ foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
+ eval {
+ my $conf = $vmdata->{lxc}->{$vmid};
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ return if !$vmfw_conf;
+
+ if ($vmfw_conf->{options}->{enable}) {
+ foreach my $netid (sort keys %$conf) {
+ next if $netid !~ m/^net(\d+)$/;
+ my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
+ next if !$net->{firewall};
+ my $iface = "veth${vmid}i$1";
+ my $macaddr = $net->{hwaddr};
+ generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, 'IN', $ipversion);
+ generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, 'OUT', $ipversion);
+ }
+ }
+ };
+ warn $@ if $@; # just to be sure - should not happen
+ }
- die "unknown status '$status' - internal error"
- if $status !~ m/^(stopped|active)$/;
+ if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
+ ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
+ }
- mkdir dirname($pve_fw_status_filename);
- PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
+ return $ruleset;
}
-sub read_pvefw_status {
+sub mac_to_linklocal {
+ my ($macaddr) = @_;
+ my @parts = split(/:/, $macaddr);
+ # The standard link local address uses the fe80::/64 prefix with the
+ # modified EUI-64 identifier derived from the MAC address by flipping the
+ # universal/local bit and inserting FF:FE in the middle.
+ # See RFC 4291.
+ $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
+ my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
+ return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
+}
- my $status = 'unknown';
+sub compile_ipsets {
+ my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
- return 'stopped' if ! -f $pve_fw_status_filename;
+ my $localnet;
+ if ($cluster_conf->{aliases}->{local_network}) {
+ $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
+ } else {
+ my $localnet_ver;
+ ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
- eval {
- $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
- };
- warn $@ if $@;
+ $cluster_conf->{aliases}->{local_network} = {
+ name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
+ }
- return $status;
-}
+ push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
-# fixme: move to pve-common PVE::ProcFSTools
-sub read_proc_net_route {
- my $filename = "/proc/net/route";
- my $res = {};
+ my $ipset_ruleset = {};
- my $fh = IO::File->new ($filename, "r");
- return $res if !$fh;
+ # generate ipsets for QEMU VMs
+ foreach my $vmid (keys %{$vmdata->{qemu}}) {
+ eval {
+ my $conf = $vmdata->{qemu}->{$vmid};
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ return if !$vmfw_conf;
+
+ # When the 'ipfilter' option is enabled every device for which there
+ # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
+ # ipset.
+ # The reason is that ipfilter ipsets are always filled with standard
+ # IPv6 link-local filters.
+ my $ipsets = $vmfw_conf->{ipset};
+ my $implicit_sets = {};
+
+ my $device_ips = {};
+ foreach my $netid (keys %$conf) {
+ next if $netid !~ m/^net(\d+)$/;
+ my $net = PVE::QemuServer::parse_net($conf->{$netid});
+ next if !$net->{firewall};
+
+ if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
+ $implicit_sets->{"ipfilter-$netid"} = [];
+ }
- my $int_to_quad = sub {
- return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
- };
+ my $macaddr = $net->{macaddr};
+ my $linklocal = mac_to_linklocal($macaddr);
+ $device_ips->{$netid} = [
+ { cidr => $linklocal },
+ { cidr => 'fe80::/10', nomatch => 1 }
+ ];
+ }
- while (defined(my $line = <$fh>)) {
- next if $line =~/^Iface\s+Destination/; # skip head
- my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
- push @{$res->{$iface}}, {
- dest => &$int_to_quad(hex($dest)),
- gateway => &$int_to_quad(hex($gateway)),
- mask => &$int_to_quad(hex($mask)),
- metric => $metric,
- mtu => $mtu,
+ generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
+ generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
};
+ warn $@ if $@; # just to be sure - should not happen
}
- return $res;
-}
+ # generate firewall rules for LXC containers
+ foreach my $vmid (keys %{$vmdata->{lxc}}) {
+ eval {
+ my $conf = $vmdata->{lxc}->{$vmid};
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ return if !$vmfw_conf;
+
+ # When the 'ipfilter' option is enabled every device for which there
+ # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
+ # ipset.
+ # The reason is that ipfilter ipsets are always filled with standard
+ # IPv6 link-local filters, as well as the IP addresses configured
+ # for the container.
+ my $ipsets = $vmfw_conf->{ipset};
+ my $implicit_sets = {};
+
+ my $device_ips = {};
+ foreach my $netid (keys %$conf) {
+ next if $netid !~ m/^net(\d+)$/;
+ my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
+ next if !$net->{firewall};
+
+ if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
+ $implicit_sets->{"ipfilter-$netid"} = [];
+ }
-sub load_security_groups {
+ my $macaddr = $net->{hwaddr};
+ my $linklocal = mac_to_linklocal($macaddr);
+ my $set = $device_ips->{$netid} = [
+ { cidr => $linklocal },
+ { cidr => 'fe80::/10', nomatch => 1 }
+ ];
+ if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
+ push @$set, { cidr => $1 };
+ }
+ if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
+ push @$set, { cidr => $1 };
+ }
+ }
- my $groups_conf = {};
- my $filename = "/etc/pve/firewall/groups.fw";
- if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $groups_conf = parse_group_fw_rules($filename, $fh);
+ generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
+ generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
+ };
+ warn $@ if $@; # just to be sure - should not happen
}
- return $groups_conf;
-}
-
-sub load_hostfw_conf {
+ generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
- my $hostfw_conf = {};
- my $filename = "/etc/pve/local/host.fw";
- if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $hostfw_conf = parse_host_fw_rules($filename, $fh);
- }
- return $hostfw_conf;
+ return $ipset_ruleset;
}
-sub compile {
- my $vmdata = read_local_vm_config();
- my $vmfw_configs = read_vm_firewall_configs($vmdata);
-
- my $routing_table = read_proc_net_route();
+sub compile_ebtables_filter {
+ my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
- my $groups_conf = load_security_groups();
+ return ({}, {}) if !$cluster_conf->{options}->{enable};
my $ruleset = {};
- ruleset_create_chain($ruleset, "PVEFW-INPUT");
- ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
-
ruleset_create_chain($ruleset, "PVEFW-FORWARD");
- my $hostfw_conf = load_hostfw_conf();
- my $hostfw_options = $hostfw_conf->{options} || {};
-
- generate_std_chains($ruleset, $hostfw_options);
-
- my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
- enable_host_firewall($ruleset, $hostfw_conf, $groups_conf) if $hostfw_enable;
+ ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
+ #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
+ ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
+ ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
+ ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
# generate firewall rules for QEMU VMs
foreach my $vmid (keys %{$vmdata->{qemu}}) {
- my $conf = $vmdata->{qemu}->{$vmid};
- my $vmfw_conf = $vmfw_configs->{$vmid};
- next if !$vmfw_conf;
- next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
+ eval {
+ my $conf = $vmdata->{qemu}->{$vmid};
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ return if !$vmfw_conf;
- foreach my $netid (keys %$conf) {
- next if $netid !~ m/^net(\d+)$/;
- my $net = PVE::QemuServer::parse_net($conf->{$netid});
- next if !$net;
- my $iface = "tap${vmid}i$1";
+ foreach my $netid (keys %$conf) {
+ next if $netid !~ m/^net(\d+)$/;
+ my $net = PVE::QemuServer::parse_net($conf->{$netid});
+ next if !$net->{firewall};
+ my $iface = "tap${vmid}i$1";
+ my $macaddr = $net->{macaddr};
- my $bridge = $net->{bridge};
- next if !$bridge; # fixme: ?
+ generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
- $bridge .= "v$net->{tag}" if $net->{tag};
-
- generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
-
- my $macaddr = $net->{macaddr};
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
- $vmfw_conf, $vmid, $bridge, 'IN');
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
- $vmfw_conf, $vmid, $bridge, 'OUT');
- }
+ }
+ };
+ warn $@ if $@; # just to be sure - should not happen
}
- # generate firewall rules for OpenVZ containers
- foreach my $vmid (keys %{$vmdata->{openvz}}) {
- my $conf = $vmdata->{openvz}->{$vmid};
+ # generate firewall rules for LXC containers
+ foreach my $vmid (keys %{$vmdata->{lxc}}) {
+ eval {
+ my $conf = $vmdata->{lxc}->{$vmid};
+
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
+
+ foreach my $netid (keys %$conf) {
+ next if $netid !~ m/^net(\d+)$/;
+ my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
+ next if !$net->{firewall};
+ my $iface = "veth${vmid}i$1";
+ my $macaddr = $net->{hwaddr};
+ generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
+ }
+ };
+ warn $@ if $@; # just to be sure - should not happen
+ }
- my $vmfw_conf = $vmfw_configs->{$vmid};
- next if !$vmfw_conf;
- next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
+ return $ruleset;
+}
- if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
- my $ip = $conf->{ip_address}->{value};
- generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'IN');
- generate_venet_rules_direction($ruleset, $groups_conf, $vmfw_conf, $vmid, $ip, 'OUT');
- }
+sub generate_tap_layer2filter {
+ my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid) = @_;
+ my $options = $vmfw_conf->{options};
- if ($conf->{netif} && $conf->{netif}->{value}) {
- my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
- foreach my $netid (keys %$netif) {
- my $d = $netif->{$netid};
- my $bridge = $d->{bridge};
- if (!$bridge) {
- warn "no bridge device for CT $vmid iface '$netid'\n";
- next; # fixme?
- }
-
- generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
-
- my $macaddr = $d->{mac};
- my $iface = $d->{host_ifname};
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
- $vmfw_conf, $vmid, $bridge, 'IN');
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
- $vmfw_conf, $vmid, $bridge, 'OUT');
- }
- }
- }
+ my $tapchain = $iface."-OUT";
- # fixme: what log level should we use here?
- my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
+ # ebtables remove zeros from mac pairs
+ $macaddr =~ s/0([0-9a-f])/$1/ig;
+ $macaddr = lc($macaddr);
- # fixme: should we really block inter-bridge traffic?
+ ruleset_create_chain($ruleset, $tapchain);
- # always allow traffic from containers?
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
+ if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
+ ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
+ }
- # disable interbridge routing
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
- ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
- ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
+ if (defined($options->{layer2_protocols})){
+ foreach my $proto (split(/,/, $options->{layer2_protocols})) {
+ ruleset_addrule($ruleset, $tapchain, "-p $proto", '-j ACCEPT');
+ }
+ ruleset_addrule($ruleset, $tapchain, '', "-j DROP");
+ } else {
+ ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
+ }
- return wantarray ? ($ruleset, $hostfw_conf) : $ruleset;
+ ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
}
sub get_ruleset_status {
- my ($ruleset, $verbose) = @_;
-
- my $active_chains = iptables_get_chains();
+ my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
my $statushash = {};
foreach my $chain (sort keys %$ruleset) {
- my $digest = Digest::SHA->new('sha1');
- foreach my $cmd (@{$ruleset->{$chain}}) {
- $digest->add("$cmd\n");
- }
- my $sig = $digest->b64digest;
+ my $sig = &$digest_fn($ruleset->{$chain});
+
$statushash->{$chain}->{sig} = $sig;
my $oldsig = $active_chains->{$chain};
return $statushash;
}
-sub print_ruleset {
- my ($ruleset) = @_;
-
- get_ruleset_status($ruleset, 1);
-}
-
sub print_sig_rule {
my ($chain, $sig) = @_;
return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
}
-sub get_rulset_cmdlist {
- my ($ruleset, $verbose) = @_;
+sub get_ruleset_cmdlist {
+ my ($ruleset, $verbose, $iptablescmd) = @_;
my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
- my $statushash = get_ruleset_status($ruleset, $verbose);
+ my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
+ my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
# create missing chains first
foreach my $chain (sort keys %$ruleset) {
$cmdlist .= ":$chain - [0:0]\n";
}
- my $rule = "INPUT -j PVEFW-INPUT";
- if (!PVE::Firewall::iptables_rule_exist($rule)) {
- $cmdlist .= "-A $rule\n";
- }
- $rule = "OUTPUT -j PVEFW-OUTPUT";
- if (!PVE::Firewall::iptables_rule_exist($rule)) {
- $cmdlist .= "-A $rule\n";
- }
-
- $rule = "FORWARD -j PVEFW-FORWARD";
- if (!PVE::Firewall::iptables_rule_exist($rule)) {
- $cmdlist .= "-A $rule\n";
+ foreach my $h (qw(INPUT OUTPUT FORWARD)) {
+ my $chain = "PVEFW-$h";
+ if ($ruleset->{$chain} && !$hooks->{$h}) {
+ $cmdlist .= "-A $h -j $chain\n";
+ }
}
foreach my $chain (sort keys %$ruleset) {
$cmdlist .= "-X $chain\n";
}
+ my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
+
$cmdlist .= "COMMIT\n";
- return $cmdlist;
+ return wantarray ? ($cmdlist, $changes) : $cmdlist;
+}
+
+sub get_ebtables_cmdlist {
+ my ($ruleset, $verbose) = @_;
+
+ my $changes = 0;
+ my $cmdlist = "*filter\n";
+
+ my ($active_chains, $hooks) = ebtables_get_chains();
+ my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
+
+ # create chains first
+ foreach my $chain (sort keys %$ruleset) {
+ my $stat = $statushash->{$chain};
+ die "internal error" if !$stat;
+ $cmdlist .= ":$chain ACCEPT\n";
+ }
+
+ if ($ruleset->{FORWARD}) {
+ $cmdlist .= "-A FORWARD -j PVEFW-FORWARD\n";
+ }
+
+ foreach my $chain (sort keys %$ruleset) {
+ my $stat = $statushash->{$chain};
+ die "internal error" if !$stat;
+ $changes = 1 if ($stat->{action} ne 'exists');
+
+ foreach my $cmd (@{$ruleset->{$chain}}) {
+ $cmdlist .= "$cmd\n";
+ }
+ }
+
+ return wantarray ? ($cmdlist, $changes) : $cmdlist;
+}
+
+sub get_ipset_cmdlist {
+ my ($ruleset, $verbose) = @_;
+
+ my $cmdlist = "";
+
+ my $delete_cmdlist = "";
+
+ my $active_chains = ipset_get_chains();
+ my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
+
+ # remove stale _swap chains
+ foreach my $chain (keys %$active_chains) {
+ if ($chain =~ m/^PVEFW-\S+_swap$/) {
+ $cmdlist .= "destroy $chain\n";
+ }
+ }
+
+ foreach my $chain (keys %$ruleset) {
+ my $stat = $statushash->{$chain};
+ die "internal error" if !$stat;
+
+ if ($stat->{action} eq 'create') {
+ foreach my $cmd (@{$ruleset->{$chain}}) {
+ $cmdlist .= "$cmd\n";
+ }
+ }
+ }
+
+ foreach my $chain (keys %$ruleset) {
+ my $stat = $statushash->{$chain};
+ die "internal error" if !$stat;
+
+ if ($stat->{action} eq 'update') {
+ my $chain_swap = $chain."_swap";
+
+ foreach my $cmd (@{$ruleset->{$chain}}) {
+ $cmd =~ s/$chain/$chain_swap/;
+ $cmdlist .= "$cmd\n";
+ }
+ $cmdlist .= "swap $chain_swap $chain\n";
+ $cmdlist .= "flush $chain_swap\n";
+ $cmdlist .= "destroy $chain_swap\n";
+ }
+ }
+
+ # the remove unused chains
+ foreach my $chain (keys %$statushash) {
+ next if $statushash->{$chain}->{action} ne 'delete';
+
+ $delete_cmdlist .= "flush $chain\n";
+ $delete_cmdlist .= "destroy $chain\n";
+ }
+
+ my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
+
+ return ($cmdlist, $delete_cmdlist, $changes);
}
sub apply_ruleset {
- my ($ruleset, $hostfw_conf, $verbose) = @_;
+ my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
enable_bridge_firewall();
- update_nf_conntrack_max($hostfw_conf);
+ my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
+ get_ipset_cmdlist($ipset_ruleset, $verbose);
+
+ my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
+ my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
+ my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset, $verbose);
+
+ if ($verbose) {
+ if ($ipset_changes) {
+ print "ipset changes:\n";
+ print $ipset_create_cmdlist if $ipset_create_cmdlist;
+ print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
+ }
+
+ if ($changes) {
+ print "iptables changes:\n";
+ print $cmdlist;
+ }
+
+ if ($changesv6) {
+ print "ip6tables changes:\n";
+ print $cmdlistv6;
+ }
- my $cmdlist = get_rulset_cmdlist($ruleset, $verbose);
+ if ($ebtables_changes) {
+ print "ebtables changes:\n";
+ print $ebtables_cmdlist;
+ }
+ }
+
+ my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
+ PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
+
+ ipset_restore_cmdlist($ipset_create_cmdlist);
- print $cmdlist if $verbose;
+ $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
+ PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
iptables_restore_cmdlist($cmdlist);
+ $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
+ PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
+
+ ip6tables_restore_cmdlist($cmdlistv6);
+
+ $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
+ PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
+
+ ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
+
+ ebtables_restore_cmdlist($ebtables_cmdlist);
+
+ $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
+ PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
+
# test: re-read status and check if everything is up to date
- my $statushash = get_ruleset_status($ruleset);
+ my $active_chains = iptables_get_chains();
+ my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
my $errors;
foreach my $chain (sort keys %$ruleset) {
}
}
+ my $active_chainsv6 = iptables_get_chains("ip6tables");
+ my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
+
+ foreach my $chain (sort keys %$rulesetv6) {
+ my $stat = $statushashv6->{$chain};
+ if ($stat->{action} ne 'exists') {
+ warn "unable to update chain '$chain'\n";
+ $errors = 1;
+ }
+ }
+
+ my $active_ebtables_chains = ebtables_get_chains();
+ my $ebtables_statushash = get_ruleset_status($ebtables_ruleset, $active_ebtables_chains, \&iptables_chain_digest, 0);
+
+ foreach my $chain (sort keys %$ebtables_ruleset) {
+ my $stat = $ebtables_statushash->{$chain};
+ if ($stat->{action} ne 'exists') {
+ warn "ebtables : unable to update chain '$chain'\n";
+ $errors = 1;
+ }
+ }
+
die "unable to apply firewall changes\n" if $errors;
+
+ update_nf_conntrack_max($hostfw_conf);
+
+ update_nf_conntrack_tcp_timeout_established($hostfw_conf);
+
}
sub update_nf_conntrack_max {
}
}
-sub update {
- my ($start, $verbose) = @_;
+sub update_nf_conntrack_tcp_timeout_established {
+ my ($hostfw_conf) = @_;
- my $code = sub {
- my $status = read_pvefw_status();
+ my $options = $hostfw_conf->{options} || {};
- my ($ruleset, $hostfw_conf) = PVE::Firewall::compile();
+ my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
- if ($start || $status eq 'active') {
+ PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
+}
- save_pvefw_status('active') if ($status ne 'active');
+sub remove_pvefw_chains {
- apply_ruleset($ruleset, $hostfw_conf, $verbose);
- } else {
- print "Firewall not active (status = $status)\n" if $verbose;
+ PVE::Firewall::remove_pvefw_chains_iptables("iptables");
+ PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
+ PVE::Firewall::remove_pvefw_chains_ipset();
+
+}
+
+sub remove_pvefw_chains_iptables {
+ my ($iptablescmd) = @_;
+
+ my ($chash, $hooks) = iptables_get_chains($iptablescmd);
+ my $cmdlist = "*filter\n";
+
+ foreach my $h (qw(INPUT OUTPUT FORWARD)) {
+ if ($hooks->{$h}) {
+ $cmdlist .= "-D $h -j PVEFW-$h\n";
+ }
+ }
+
+ foreach my $chain (keys %$chash) {
+ $cmdlist .= "-F $chain\n";
+ }
+
+ foreach my $chain (keys %$chash) {
+ $cmdlist .= "-X $chain\n";
+ }
+ $cmdlist .= "COMMIT\n";
+
+ if($iptablescmd eq "ip6tables") {
+ ip6tables_restore_cmdlist($cmdlist);
+ } else {
+ iptables_restore_cmdlist($cmdlist);
+ }
+}
+
+sub remove_pvefw_chains_ipset {
+
+ my $ipset_chains = ipset_get_chains();
+
+ my $cmdlist = "";
+
+ foreach my $chain (keys %$ipset_chains) {
+ $cmdlist .= "flush $chain\n";
+ $cmdlist .= "destroy $chain\n";
+ }
+
+ ipset_restore_cmdlist($cmdlist) if $cmdlist;
+}
+
+sub init {
+ my $cluster_conf = load_clusterfw_conf();
+ my $cluster_options = $cluster_conf->{options};
+ my $enable = $cluster_options->{enable};
+
+ return if !$enable;
+
+ # load required modules here
+}
+
+sub update {
+ my $code = sub {
+
+ my $cluster_conf = load_clusterfw_conf();
+ my $cluster_options = $cluster_conf->{options};
+
+ if (!$cluster_options->{enable}) {
+ PVE::Firewall::remove_pvefw_chains();
+ return;
}
+
+ my $hostfw_conf = load_hostfw_conf($cluster_conf);
+
+ my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
+
+ apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
};
run_locked($code);
}
-
1;
projects / pve-firewall.git / blobdiff