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 qw($IPV4RE $IPV6RE);
-use PVE::Network;
-use PVE::SafeSyslog;
+use Encode;
use File::Basename;
use File::Path;
use IO::File;
use Net::IP;
-use PVE::Tools qw(run_command lock_file dir_glob_foreach);
-use Encode;
+use POSIX;
+use Socket qw(AF_INET AF_INET6 inet_ntop inet_pton);
use Storable qw(dclone);
-my $hostfw_conf_filename = "/etc/pve/local/host.fw";
+use PVE::Cluster;
+use PVE::Corosync;
+use PVE::Exception qw(raise raise_param_exc);
+use PVE::INotify;
+use PVE::JSONSchema qw(register_standard_option get_standard_option);
+use PVE::Network;
+use PVE::ProcFSTools;
+use PVE::SafeSyslog;
+use PVE::Tools qw($IPV4RE $IPV6RE);
+use PVE::Tools qw(run_command lock_file dir_glob_foreach);
+
my $pvefw_conf_dir = "/etc/pve/firewall";
my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
$have_lxc = 1;
};
-
my $pve_fw_status_dir = "/var/lib/pve-firewall";
mkdir $pve_fw_status_dir; # make sure this exists
};
my $nodename = PVE::INotify::nodename();
+my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
],
'Ceph' => [
"Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
+ # Legacy port for protocol v1
{ action => 'PARAM', proto => 'tcp', dport => '6789' },
+ # New port for protocol v2
+ { action => 'PARAM', proto => 'tcp', dport => '3300' },
{ action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
],
'CVS' => [
{ action => 'PARAM', proto => 'udp', dport => '5632' },
{ action => 'PARAM', proto => 'tcp', dport => '5631' },
],
+ 'PMG' => [
+ "Proxmox Mail Gateway web interface",
+ { action => 'PARAM', proto => 'tcp', dport => '8006' },
+ ],
'POP3' => [
"POP3 traffic",
{ action => 'PARAM', proto => 'tcp', dport => '110' },
#{ action => 'DROP', dest => '224.0.0.0/4' },
],
'PVEFW-reject' => [
- # same as shorewall 'reject'
- #{ action => 'DROP', dsttype => 'BROADCAST' },
- #{ action => 'DROP', source => '224.0.0.0/4' },
{ action => 'DROP', proto => 'icmpv6' },
{ match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
- #"-p udp -j REJECT --reject-with icmp-port-unreachable",
- #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
- #"-j REJECT --reject-with icmp-host-prohibited",
+ { match => '-p udp', target => '-j REJECT --reject-with icmp6-port-unreachable' },
+ { target => '-j REJECT --reject-with icmp6-adm-prohibited' },
],
'PVEFW-Drop' => [
# same as shorewall 'Drop', which is equal to DROP,
}
# ipset names are limited to 31 characters,
-# and we use '-v4' or '-v6' to indicate IP versions,
-# and we use '_swap' suffix for atomic update,
+# and we use '-v4' or '-v6' to indicate IP versions,
+# and we use '_swap' suffix for atomic update,
# for example PVEFW-${VMID}-${ipset_name}_swap
my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
tcpflags => {
description => "Filter illegal combinations of TCP flags.",
type => 'boolean',
+ default => 0,
optional => 1,
},
nf_conntrack_max => {
description => "Maximum number of tracked connections.",
type => 'integer',
optional => 1,
+ default => 262144,
minimum => 32768,
},
nf_conntrack_tcp_timeout_established => {
description => "Conntrack established timeout.",
type => 'integer',
optional => 1,
+ default => 432000,
minimum => 7875,
},
+ nf_conntrack_tcp_timeout_syn_recv => {
+ description => "Conntrack syn recv timeout.",
+ type => 'integer',
+ optional => 1,
+ default => 60,
+ minimum => 30,
+ maximum => 60,
+ },
ndp => {
- description => "Enable NDP.",
+ description => "Enable NDP (Neighbor Discovery Protocol).",
type => 'boolean',
+ default => 0,
optional => 1,
},
nf_conntrack_allow_invalid => {
default => 0,
optional => 1,
},
+ protection_synflood => {
+ description => "Enable synflood protection",
+ type => 'boolean',
+ default => 0,
+ optional => 1,
+ },
+ protection_synflood_rate => {
+ description => "Synflood protection rate syn/sec by ip src.",
+ type => 'integer',
+ optional => 1,
+ default => 200,
+ },
+ protection_synflood_burst => {
+ description => "Synflood protection rate burst by ip src.",
+ type => 'integer',
+ optional => 1,
+ default => 1000,
+ },
log_nf_conntrack => {
description => "Enable logging of conntrack information.",
type => 'boolean',
enable => {
description => "Enable/disable firewall rules.",
type => 'boolean',
+ default => 0,
optional => 1,
},
macfilter => {
description => "Enable/disable MAC address filter.",
type => 'boolean',
+ default => 0,
optional => 1,
},
dhcp => {
description => "Enable DHCP.",
type => 'boolean',
+ default => 0,
optional => 1,
},
ndp => {
- description => "Enable NDP.",
+ description => "Enable NDP (Neighbor Discovery Protocol).",
type => 'boolean',
+ default => 0,
optional => 1,
},
radv => {
}
if ($rule->{source}) {
- eval {
+ eval {
my $source_ipversion = parse_address_list($rule->{source});
&$set_ip_version($source_ipversion);
};
}
if ($rule->{dest}) {
- eval {
- my $dest_ipversion = parse_address_list($rule->{dest});
+ eval {
+ my $dest_ipversion = parse_address_list($rule->{dest});
&$set_ip_version($dest_ipversion);
};
&$add_error('dest', $@) if $@;
}
sub iptables_restore_cmdlist {
- my ($cmdlist) = @_;
+ my ($cmdlist, $table) = @_;
- run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
+ $table = 'filter' if !$table;
+ run_command(['iptables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
}
sub ip6tables_restore_cmdlist {
- my ($cmdlist) = @_;
+ my ($cmdlist, $table) = @_;
- run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
+ $table = 'filter' if !$table;
+ run_command(['ip6tables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
}
sub ipset_restore_cmdlist {
my ($cmdlist) = @_;
- run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
+ run_command(['ipset', 'restore'], input => $cmdlist, errmsg => "ipset_restore_cmdlist");
}
sub ebtables_restore_cmdlist {
my ($cmdlist) = @_;
- run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
+ run_command(['ebtables-restore'], input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
}
sub iptables_get_chains {
- my ($iptablescmd) = @_;
+ my ($iptablescmd, $t) = @_;
$iptablescmd = "iptables" if !$iptablescmd;
+ $t = 'filter' if !$t;
my $res = {};
return;
}
- return if $table ne 'filter';
+ return if $table ne $t;
if ($line =~ m/^:(\S+)\s/) {
my $chain = $1;
my ($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$/) {
+ } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
$hooks->{$1} = 1;
} else {
# simply ignore the rest
}
};
- run_command("/sbin/$iptablescmd-save", outfunc => $parser);
+ run_command(["$iptablescmd-save"], outfunc => $parser);
return wantarray ? ($res, $hooks) : $res;
}
}
};
- run_command("/sbin/ipset save", outfunc => $parser);
+ run_command(['ipset', 'save'], outfunc => $parser);
# compute digest for each chain
foreach my $chain (keys %$chains) {
}
};
- run_command("/sbin/ebtables-save", outfunc => $parser);
+ run_command(['ebtables-save'], outfunc => $parser);
# compute digest for each chain and store rules as well
foreach my $chain (keys %$chains) {
$res->{$chain}->{rules} = $chains->{$chain};
if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
if ($ipversion == 4) {
if ($direction eq 'OUT') {
- ruleset_generate_rule($ruleset, $chain, $ipversion,
+ ruleset_generate_rule($ruleset, $chain, $ipversion,
{ action => 'PVEFW-SET-ACCEPT-MARK',
proto => 'udp', sport => 68, dport => 67 });
} else {
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}) {
+ # create chain with mac and ip filter
+ ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
+
ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
# plug the tap chain to bridge chain
if ($direction eq 'IN') {
ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
- "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain", $loglevel, 'FWBR-IN: ', $vmid);
+ "-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", $loglevel, 'FWBR-OUT: ', $vmid);
+ "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
}
}
sub enable_host_firewall {
- my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
+ my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
my $options = $hostfw_conf->{options};
my $cluster_options = $cluster_conf->{options};
my $rules = $hostfw_conf->{rules};
my $cluster_rules = $cluster_conf->{rules};
+ # corosync preparation
+ my $corosync_rule = "-p udp --dport 5404:5405";
+ my $corosync_local_addresses = {};
+ my $multicast_enabled;
+ my $local_hostname = PVE::INotify::nodename();
+ if (defined($corosync_conf)) {
+ PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
+ my ($node_name, $node_ip, $node_ipversion, $key) = @_;
+
+ if ($node_name eq $local_hostname) {
+ $corosync_local_addresses->{$key} = $node_ip;
+ }
+ });
+
+ # allow multicast only if enabled in config
+ my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
+ $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
+ }
+
# host inbound firewall
my $chain = "PVEFW-HOST-IN";
ruleset_create_chain($ruleset, $chain);
$rule->{iface_in} = $rule->{iface} if $rule->{iface};
eval {
+ $rule->{logmsg} = "$rule->{action}: ";
if ($rule->{type} eq 'group') {
ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
} elsif ($rule->{type} eq 'in') {
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 $accept_action"); # SSH
+ ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 60000:60050", "-j $accept_action"); # Migration
- my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
- my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
+ # corosync inbound rules
+ if (defined($corosync_conf)) {
+ ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
+ if $multicast_enabled;
- # corosync
- if ($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 $accept_action");
+ PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
+ my ($node_name, $node_ip, $node_ipversion, $key) = @_;
+ my $destination = $corosync_local_addresses->{$key};
+
+ if ($node_name ne $local_hostname && defined($destination)) {
+ # accept only traffic on same ring
+ ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
+ }
+ });
}
# implement input policy
}
# allow standard traffic on cluster network
+ my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
+ my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
+
if ($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 $accept_action"); # SPICE Proxy
+ }
+
+ # corosync outbound rules
+ if (defined($corosync_conf)) {
+ ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
+ if $multicast_enabled;
- 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 $accept_action");
+ PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
+ my ($node_name, $node_ip, $node_ipversion, $key) = @_;
+ my $source = $corosync_local_addresses->{$key};
+
+ if ($node_name ne $local_hostname && defined($source)) {
+ # accept only traffic on same ring
+ ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
+ }
+ });
}
# implement output policy
my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
- if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
+ if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\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*$/i) {
+ } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established|nf_conntrack_tcp_timeout_syn_recv|protection_synflood_rate|protection_synflood_burst|protection_limit):\s*(\d+)\s*$/i) {
$opt = lc($1);
$value = int($2);
} else {
my ($cidr) = @_;
my $ipversion;
-
+
if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
$cidr =~ s|/128$||;
$ipversion = 6;
}
sub generic_fw_config_parser {
- my ($filename, $fh, $cluster_conf, $empty_conf, $rule_env) = @_;
+ my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
my $section;
my $group;
my $res = $empty_conf;
- while (defined(my $line = <$fh>)) {
+ my $raw;
+ if ($filename =~ m!^/etc/pve/(.*)$!) {
+ $raw = PVE::Cluster::get_config($1);
+ } else {
+ $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
+ }
+ return {} if !$raw;
+
+ my $linenr = 0;
+ while ($raw =~ /^\h*(.*?)\h*$/gm) {
+ my $line = $1;
+ $linenr++;
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/^\[options\]$/i)) {
warn "$prefix: $err";
next;
}
-
+
$res->{$section}->{$group} = [];
$res->{group_comments}->{$group} = decode('utf8', $comment)
if $comment;
$section = 'ipset';
$group = lc($1);
my $comment = $2;
- eval {
+ eval {
die "ipset name too long\n" if length($group) > $max_ipset_name_length;
die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
};
$errors->{nomatch} = "nomatch not supported by kernel";
}
- eval {
+ eval {
if ($cidr =~ m/^${ip_alias_pattern}$/) {
resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
} else {
return $res;
}
-sub parse_hostfw_config {
- my ($filename, $fh, $cluster_conf) = @_;
-
- my $empty_conf = { rules => [], options => {}};
-
- return generic_fw_config_parser($filename, $fh, $cluster_conf, $empty_conf, 'host');
-}
-
-sub parse_vmfw_config {
- my ($filename, $fh, $cluster_conf, $rule_env) = @_;
-
- my $empty_conf = {
- rules => [],
- options => {},
- aliases => {},
- ipset => {} ,
- ipset_comments => {},
- };
-
- return generic_fw_config_parser($filename, $fh, $cluster_conf, $empty_conf, $rule_env);
-}
-
-sub parse_clusterfw_config {
- my ($filename, $fh) = @_;
-
- my $section;
- my $group;
-
- my $empty_conf = {
- rules => [],
- options => {},
- aliases => {},
- groups => {},
- group_comments => {},
- ipset => {} ,
- ipset_comments => {},
- };
-
- return generic_fw_config_parser($filename, $fh, $empty_conf, $empty_conf, 'cluster');
-}
-
+# this is only used to prevent concurrent runs of rule compilation/application
+# see lock_*_conf for cfs locks protectiong config modification
sub run_locked {
my ($code, @param) = @_;
return $vmdata;
};
+sub lock_vmfw_conf {
+ my ($vmid, $timeout, $code, @param) = @_;
+
+ die "can't lock VM firewall config for undefined VMID\n"
+ if !defined($vmid);
+
+ my $res = PVE::Cluster::cfs_lock_firewall("vm-$vmid", $timeout, $code, @param);
+ die $@ if $@;
+
+ return $res;
+}
+
sub load_vmfw_conf {
my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
- 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);
- $vmfw_conf->{vmid} = $vmid;
- }
+
+ my $empty_conf = {
+ rules => [],
+ options => {},
+ aliases => {},
+ ipset => {} ,
+ ipset_comments => {},
+ };
+
+ my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
+ $vmfw_conf->{vmid} = $vmid;
return $vmfw_conf;
}
my $format_ipsets = sub {
my ($fw_conf) = @_;
-
+
my $raw = '';
foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
- 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, $data);
- }
+ lock_vmfw_conf($newid, 10, sub {
+ 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);
+ }
+ });
}
sub read_vm_firewall_configs {
foreach my $vmid (keys %{$vmdata->{qemu}}) {
my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
- next if !$vmfw_conf->{options}; # skip if file does not exists
+ next if !$vmfw_conf->{options}; # skip if file does not exist
$vmfw_configs->{$vmid} = $vmfw_conf;
}
foreach my $vmid (keys %{$vmdata->{lxc}}) {
my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
- next if !$vmfw_conf->{options}; # skip if file does not exists
+ next if !$vmfw_conf->{options}; # skip if file does not exist
$vmfw_configs->{$vmid} = $vmfw_conf;
}
}
};
+sub lock_clusterfw_conf {
+ my ($timeout, $code, @param) = @_;
+
+ my $res = PVE::Cluster::cfs_lock_firewall("cluster", $timeout, $code, @param);
+ die $@ if $@;
+
+ return $res;
+}
+
sub load_clusterfw_conf {
my ($filename) = @_;
$filename = $clusterfw_conf_filename if !defined($filename);
+ my $empty_conf = {
+ rules => [],
+ options => {},
+ aliases => {},
+ groups => {},
+ group_comments => {},
+ ipset => {} ,
+ ipset_comments => {},
+ };
- my $cluster_conf = {};
- if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $cluster_conf = parse_clusterfw_config($filename, $fh);
-
- $set_global_log_ratelimit->($cluster_conf->{options});
- }
+ my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
+ $set_global_log_ratelimit->($cluster_conf->{options});
return $cluster_conf;
}
$raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
$raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
-
+
my $rules = $cluster_conf->{rules};
if ($rules && scalar(@$rules)) {
$raw .= "[RULES]\n\n";
}
}
+sub lock_hostfw_conf {
+ my ($timeout, $code, @param) = @_;
+
+ my $res = PVE::Cluster::cfs_lock_firewall("host-$nodename", $timeout, $code, @param);
+ die $@ if $@;
+
+ return $res;
+}
+
sub load_hostfw_conf {
my ($cluster_conf, $filename) = @_;
$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);
- }
- return $hostfw_conf;
+ my $empty_conf = { rules => [], options => {}};
+ return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
}
sub save_hostfw_conf {
}
sub compile {
- my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
+ my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
my $vmfw_configs;
$hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
+ # cfs_update is handled by daemon or API
+ $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
+ if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
+
$vmdata = read_local_vm_config();
$vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
}
push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
- my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4);
- my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6);
+ my $ruleset = {};
+ my $rulesetv6 = {};
+ $ruleset->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
+ $ruleset->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
+ $rulesetv6->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
+ $rulesetv6->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
}
+sub compile_iptables_raw {
+ my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
+
+ my $ruleset = {};
+
+ my $hostfw_options = $hostfw_conf->{options} || {};
+ my $protection_synflood = $hostfw_options->{protection_synflood} || 0;
+
+ if($protection_synflood) {
+
+ my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate} ? $hostfw_options->{protection_synflood_rate} : 200;
+ my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst} ? $hostfw_options->{protection_synflood_burst} : 1000;
+ my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit} ? $hostfw_options->{protection_synflood_limit} : 3000;
+ my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} ? $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} : 60;
+ $protection_synflood_expire = $protection_synflood_expire * 1000;
+ my $protection_synflood_mask = $ipversion == 4 ? 32 : 64;
+
+ ruleset_create_chain($ruleset, "PVEFW-PREROUTING");
+ ruleset_addrule($ruleset, "PVEFW-PREROUTING", "-p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m hashlimit --hashlimit-above $protection_synflood_rate/sec --hashlimit-burst $protection_synflood_burst --hashlimit-mode srcip --hashlimit-name syn --hashlimit-htable-size 2097152 --hashlimit-srcmask $protection_synflood_mask --hashlimit-htable-expire $protection_synflood_expire", "-j DROP");
+ }
+
+ return $ruleset;
+}
+
sub compile_iptables_filter {
- my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion) = @_;
+ my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
my $ruleset = {};
my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
if ($hostfw_enable) {
- eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
+ eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
warn $@ if $@; # just to be sure - should not happen
}
eval {
my $conf = $vmdata->{qemu}->{$vmid};
my $vmfw_conf = $vmfw_configs->{$vmid};
- return if !$vmfw_conf;
+ return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
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 $iface = "tap${vmid}i$1";
my $macaddr = $net->{macaddr};
generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
- $vmfw_conf, $vmid, 'IN', $ipversion);
+ $vmfw_conf, $vmid, 'IN', $ipversion);
generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
- $vmfw_conf, $vmid, 'OUT', $ipversion);
+ $vmfw_conf, $vmid, 'OUT', $ipversion);
}
};
warn $@ if $@; # just to be sure - should not happen
# 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
+ eval {
+ my $conf = $vmdata->{lxc}->{$vmid};
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ return if !$vmfw_conf || !$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 $@; # just to be sure - should not happen
}
- if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
+ if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
}
my $localnet_ver;
($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
- $cluster_conf->{aliases}->{local_network} = {
+ $cluster_conf->{aliases}->{local_network} = {
name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
}
push(@$arpfilter, $ip);
}
}
- push(@$arpfilter, $net->{ip}) if $net->{ip} && $vmfw_conf->{options}->{ipfilter};
+ if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
+ # ebtables changes this to a .0/MASK network but we just
+ # want the address here, no network - see #2193
+ $ip =~ s|/(\d+)$||;
+ if ($ip ne 'dhcp') {
+ push @$arpfilter, $ip;
+ }
+ }
generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
}
};
}
sub get_ruleset_cmdlist {
- my ($ruleset, $iptablescmd) = @_;
+ my ($ruleset, $iptablescmd, $table) = @_;
+
+ $table = 'filter' if !$table;
- my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
+ my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
- my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
+ my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
# create missing chains first
$cmdlist .= ":$chain - [0:0]\n";
}
- foreach my $h (qw(INPUT OUTPUT FORWARD)) {
+ foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
my $chain = "PVEFW-$h";
if ($ruleset->{$chain} && !$hooks->{$h}) {
$cmdlist .= "-A $h -j $chain\n";
next if $chain eq 'PVEFW-INPUT';
next if $chain eq 'PVEFW-OUTPUT';
next if $chain eq 'PVEFW-FORWARD';
+ next if $chain eq 'PVEFW-PREROUTING';
$cmdlist .= "-X $chain\n";
}
- my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
+ my $changes = $cmdlist ne "*$table\n" ? 1 : 0;
$cmdlist .= "COMMIT\n";
foreach my $chain (sort keys %$statushash) {
my $stat = $statushash->{$chain};
- next if ($stat->{action} eq 'delete');
$changes = 1 if ($stat->{action} !~ 'ignore|exists');
+ next if ($stat->{action} eq 'delete');
foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
get_ipset_cmdlist($ipset_ruleset);
- my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset);
- my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables");
+ my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset->{filter});
+ my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6->{filter}, "ip6tables");
my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
+ my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist($ruleset->{raw}, undef, 'raw');
+ my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist($rulesetv6->{raw}, "ip6tables", 'raw');
if ($verbose) {
if ($ipset_changes) {
print $cmdlistv6;
}
+ if ($changes_raw) {
+ print "iptables table raw changes:\n";
+ print $cmdlist_raw;
+ }
+
+ if ($changesv6_raw) {
+ print "ip6tables table raw changes:\n";
+ print $cmdlistv6_raw;
+ }
+
if ($ebtables_changes) {
print "ebtables changes:\n";
print $ebtables_cmdlist;
iptables_restore_cmdlist($cmdlist);
+ $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
+ PVE::Tools::file_set_contents($tmpfile, $cmdlist_raw || '');
+
+ iptables_restore_cmdlist($cmdlist_raw, 'raw');
+
$tmpfile = "$pve_fw_status_dir/ip6cmdlist";
PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
ip6tables_restore_cmdlist($cmdlistv6);
+ $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
+ PVE::Tools::file_set_contents($tmpfile, $cmdlistv6_raw || '');
+
+ ip6tables_restore_cmdlist($cmdlistv6_raw, 'raw');
+
$tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
# test: re-read status and check if everything is up to date
+ my $ruleset_filter = $ruleset->{filter};
my $active_chains = iptables_get_chains();
- my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
+ my $statushash = get_ruleset_status($ruleset_filter, $active_chains, \&iptables_chain_digest);
my $errors;
- foreach my $chain (sort keys %$ruleset) {
+ foreach my $chain (sort keys %$ruleset_filter) {
my $stat = $statushash->{$chain};
if ($stat->{action} ne 'exists') {
warn "unable to update chain '$chain'\n";
}
}
+ my $rulesetv6_filter = $rulesetv6->{filter};
my $active_chainsv6 = iptables_get_chains("ip6tables");
- my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest);
+ my $statushashv6 = get_ruleset_status($rulesetv6_filter, $active_chainsv6, \&iptables_chain_digest);
- foreach my $chain (sort keys %$rulesetv6) {
+ foreach my $chain (sort keys %$rulesetv6_filter) {
my $stat = $statushashv6->{$chain};
if ($stat->{action} ne 'exists') {
warn "unable to update chain '$chain'\n";
}
}
+ my $ruleset_raw = $ruleset->{raw};
+ my $active_chains_raw = iptables_get_chains(undef, 'raw');
+ my $statushash_raw = get_ruleset_status($ruleset_raw, $active_chains_raw, \&iptables_chain_digest);
+
+ foreach my $chain (sort keys %$ruleset_raw) {
+ my $stat = $statushash_raw->{$chain};
+ if ($stat->{action} ne 'exists') {
+ warn "unable to update chain '$chain'\n";
+ $errors = 1;
+ }
+ }
+
+ my $rulesetv6_raw = $rulesetv6->{raw};
+ my $active_chainsv6_raw = iptables_get_chains("ip6tables", 'raw');
+ my $statushashv6_raw = get_ruleset_status($rulesetv6_raw, $active_chainsv6_raw, \&iptables_chain_digest);
+
+ foreach my $chain (sort keys %$rulesetv6_raw) {
+ my $stat = $statushashv6_raw->{$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,
$active_ebtables_chains, \&iptables_chain_digest,
update_nf_conntrack_tcp_timeout_established($hostfw_conf);
+ update_nf_conntrack_tcp_timeout_syn_recv($hostfw_conf);
+
update_nf_conntrack_logging($hostfw_conf);
}
sub update_nf_conntrack_max {
my ($hostfw_conf) = @_;
- my $max = 65536; # reasonable default
+ my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
my $options = $hostfw_conf->{options} || {};
PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
}
+sub update_nf_conntrack_tcp_timeout_syn_recv {
+ my ($hostfw_conf) = @_;
+
+ my $options = $hostfw_conf->{options} || {};
+
+ my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv}) ? $options->{nf_conntrack_tcp_timeout_syn_recev} : 60;
+
+ PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
+}
+
my $log_nf_conntrack_enabled = undef;
sub update_nf_conntrack_logging {
my ($hostfw_conf) = @_;
my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
PVE::Tools::file_set_contents($tmpfile, $value);
- PVE::Tools::run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
+ run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
$log_nf_conntrack_enabled = $value;
}
}
PVE::Firewall::remove_pvefw_chains_iptables("iptables");
PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
+ PVE::Firewall::remove_pvefw_chains_iptables("iptables", "raw");
+ PVE::Firewall::remove_pvefw_chains_iptables("ip6tables", "raw");
PVE::Firewall::remove_pvefw_chains_ipset();
+ PVE::Firewall::remove_pvefw_chains_ebtables();
}
sub remove_pvefw_chains_iptables {
- my ($iptablescmd) = @_;
+ my ($iptablescmd, $table) = @_;
- my ($chash, $hooks) = iptables_get_chains($iptablescmd);
- my $cmdlist = "*filter\n";
+ $table = 'filter' if !$table;
+
+ my ($chash, $hooks) = iptables_get_chains($iptablescmd, $table);
+ my $cmdlist = "*$table\n";
- foreach my $h (qw(INPUT OUTPUT FORWARD)) {
+ foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
if ($hooks->{$h}) {
$cmdlist .= "-D $h -j PVEFW-$h\n";
}
$cmdlist .= "COMMIT\n";
if($iptablescmd eq "ip6tables") {
- ip6tables_restore_cmdlist($cmdlist);
+ ip6tables_restore_cmdlist($cmdlist, $table);
} else {
- iptables_restore_cmdlist($cmdlist);
+ iptables_restore_cmdlist($cmdlist, $table);
}
}
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 remove_pvefw_chains_ebtables {
+ # apply empty ruleset = remove all our chains
+ ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
+}
+
sub init {
my $cluster_conf = load_clusterfw_conf();
my $cluster_options = $cluster_conf->{options};
projects / pve-firewall.git / blobdiff