use PVE::Cluster;
use PVE::ProcFSTools;
use PVE::Tools;
-use PVE::QemuServer;
-use PVE::OpenVZ; # dependeny problem?!
use File::Basename;
use File::Path;
use IO::File;
use Net::IP;
use PVE::Tools qw(run_command lock_file);
+use Encode;
+
+# dynamically include PVE::QemuServer and PVE::OpenVZ
+# to avoid dependency problems
+my $have_qemu_server;
+eval {
+ require PVE::QemuServer;
+ $have_qemu_server = 1;
+};
+
+my $have_pve_manager;
+eval {
+ require PVE::OpenVZ;
+ $have_pve_manager = 1;
+};
use Data::Dumper;
return ($nbports);
}
+# helper function for API
+sub cleanup_fw_rule {
+ my ($rule, $digest, $pos) = @_;
+
+ my $r = {};
+
+ 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;
+ }
+
+ return $r;
+}
+
my $bridge_firewall_enabled = 0;
sub enable_bridge_firewall {
sub ruleset_generate_cmdstr {
my ($ruleset, $chain, $rule, $actions, $goto) = @_;
- return if $rule->{disable};
+ return if !$rule->{enable};
my @cmd = ();
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};
unshift @{$ruleset->{$chain}}, "-A $chain $rule";
}
+sub get_log_rule_base {
+ my ($chain, $vmid, $msg, $loglevel) = @_;
+
+ die "internal error - no log level" if !defined($loglevel);
+
+ $vmid = 0 if !defined($vmid);
+
+ # Note: we use special format for prefix to pass further
+ # info to log daemon (VMID, LOGVELEL and CHAIN)
+
+ return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
+}
+
+sub ruleset_addlog {
+ my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
+
+ return if !defined($loglevel);
+
+ my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
+
+ $logrule = "$rule $logrule" if defined($rule);
+
+ ruleset_addrule($ruleset, $chain, $logrule)
+}
+
sub generate_bridge_chains {
my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
ruleset_create_chain($ruleset, "$bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-bridged -j $bridge-FW");
+ ruleset_addrule($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 $bridge-FW");
}
if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
ruleset_create_chain($ruleset, "$bridge-OUT");
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
- ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-bridged --physdev-is-in -j $bridge-OUT");
+ ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
+ ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
}
if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
ruleset_create_chain($ruleset, "$bridge-IN");
- ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j $bridge-IN");
+ ruleset_addrule($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, "$bridge-FW", "-m physdev --physdev-is-bridged --physdev-is-out -j ACCEPT ");
+ ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
}
}
sub ruleset_add_chain_policy {
- my ($ruleset, $chain, $policy, $loglevel, $accept_action) = @_;
+ my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
if ($policy eq 'ACCEPT') {
ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
- ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-dropped: \" --log-level $loglevel")
- if defined($loglevel);
+ ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ruleset_addrule($ruleset, $chain, "-j DROP");
} elsif ($policy eq 'REJECT') {
ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
- ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"$chain-reject: \" --log-level $loglevel")
- if defined($loglevel);
+ ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
} else {
}
if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
- ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 67:68 -j ACCEPT");
+ if ($direction eq 'OUT') {
+ ruleset_addrule($ruleset, $chain, "-p udp -m udp --sport 68 --dport 67 -j PVEFW-SET-ACCEPT-MARK");
+ } else {
+ ruleset_addrule($ruleset, $chain, "-p udp -m udp --sport 67 --dport 68 -j ACCEPT");
+ }
}
if ($options->{tcpflags}) {
foreach my $rule (@$rules) {
next if $rule->{iface} && $rule->{iface} ne $netid;
- next if $rule->{disable};
+ next if !$rule->{enable};
if ($rule->{type} eq 'group') {
my $group_chain = "GROUP-$rule->{action}-$direction";
if(!ruleset_chain_exist($ruleset, $group_chain)){
}
my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
- ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
+ ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
# plug into FORWARD, INPUT and OUTPUT chain
if ($direction eq 'OUT') {
}
sub generate_tap_rules_direction {
- my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
+ my ($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
my $lc_direction = lc($direction);
}
my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : "ACCEPT";
- ruleset_add_chain_policy($ruleset, $tapchain, $policy, $loglevel, $accept_action);
+ ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
# plug the tap chain to bridge chain
- my $physdevdirection = $direction eq 'IN' ? "out" : "in";
- my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
- ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
+ if ($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");
+ }
}
sub enable_host_firewall {
my $loglevel = get_option_log_level($options, "log_level_in");
+ if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
+ ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
+ }
+
+ if ($options->{tcpflags}) {
+ ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
+ }
+
ruleset_addrule($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");
# implement input policy
my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
- ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
+ ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
# host outbound firewall
$chain = "PVEFW-HOST-OUT";
# implement output policy
$policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
- ruleset_add_chain_policy($ruleset, $chain, $policy, $loglevel, $accept_action);
+ ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
sub generate_group_rules {
my ($ruleset, $groups_conf, $group) = @_;
+ die "no such security group '$group'\n" if !$groups_conf->{rules}->{$group};
- die "no such security group '$group'\n" if !$groups_conf->{$group};
-
- my $rules = $groups_conf->{$group}->{rules};
+ my $rules = $groups_conf->{rules}->{$group};
my $chain = "GROUP-${group}-IN";
my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
# we can add single line comments to the end of the rule
- my $comment = $1 if $line =~ s/#\s*(.*?)\s*$//;
+ my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
# we can disable a rule when prefixed with '|'
- my $disable = 1 if $line =~ s/^\|//;
+ my $enable = 1;
+
+ $enable = 0 if $line =~ s/^\|//;
my @data = split(/\s+/, $line);
my $expected_elements = $need_iface ? 8 : 7;
my $param = {
type => $type,
- disable => $disable,
+ enable => $enable,
comment => $comment,
action => $action,
iface => $iface,
my $section;
+ my $digest = Digest::SHA->new('sha1');
+
while (defined(my $line = <$fh>)) {
+ $digest->add($line);
+
next if $line =~ m/^#/;
next if $line =~ m/^\s*$/;
push @{$res->{$section}}, @$rules;
}
+ $res->{digest} = $digest->b64digest;
+
return $res;
}
my $section;
+ my $digest = Digest::SHA->new('sha1');
+
while (defined(my $line = <$fh>)) {
+ $digest->add($line);
+
next if $line =~ m/^#/;
next if $line =~ m/^\s*$/;
push @{$res->{$section}}, @$rules;
}
+ $res->{digest} = $digest->b64digest;
+
return $res;
}
my $section;
my $group;
- my $res = { rules => [] };
+ my $res = { rules => {} };
+
+ my $digest = Digest::SHA->new('sha1');
while (defined(my $line = <$fh>)) {
+ $digest->add($line);
+
next if $line =~ m/^#/;
next if $line =~ m/^\s*$/;
next;
}
- push @{$res->{$group}->{$section}}, @$rules;
+ push @{$res->{$section}->{$group}}, @$rules;
}
+ $res->{digest} = $digest->b64digest;
+
return $res;
}
next if !$d->{node} || $d->{node} ne $nodename;
next if !$d->{type};
if ($d->{type} eq 'openvz') {
- my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
- if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
- $openvz->{$vmid} = $conf;
+ if ($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') {
- my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
- if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
- $qemu->{$vmid} = $conf;
+ if ($have_qemu_server) {
+ my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
+ if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
+ $qemu->{$vmid} = $conf;
+ }
}
}
}
-
+
return $vmdata;
};
+sub load_vmfw_conf {
+ my ($vmid) = @_;
+
+ my $vmfw_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);
+ }
+
+ return $vmfw_conf;
+}
+
sub read_vm_firewall_configs {
my ($vmdata) = @_;
my $vmfw_configs = {};
foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
- my $filename = "/etc/pve/firewall/$vmid.fw";
- my $fh = IO::File->new($filename, O_RDONLY);
- next if !$fh;
-
- $vmfw_configs->{$vmid} = parse_vm_fw_rules($filename, $fh);
+ my $vmfw_conf = load_vmfw_conf($vmid);
+ next if !$vmfw_conf->{options}; # skip if file does not exists
+ $vmfw_configs->{$vmid} = $vmfw_conf;
}
return $vmfw_configs;
my $loglevel = get_option_log_level($options, 'smurf_log_level');
# same as shorewall smurflog.
- if (defined($loglevel)) {
- $pve_std_chains-> {'PVEFW-smurflog'} = [
- "-j LOG --log-prefix \"smurfs-dropped: \" --log-level $loglevel",
- "-j DROP",
- ];
- } else {
- $pve_std_chains-> {'PVEFW-smurflog'} = [ "-j DROP" ];
- }
+ my $chain = 'PVEFW-smurflog';
+
+ push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
+ push @{$pve_std_chains->{$chain}}, "-j DROP";
# same as shorewall logflags action.
$loglevel = get_option_log_level($options, 'tcp_flags_log_level');
- if (defined($loglevel)) {
- $pve_std_chains-> {'PVEFW-logflags'} = [
- "-j LOG --log-prefix \"logflags-dropped: \" --log-level $loglevel --log-ip-options",
- "-j DROP",
- ];
- } else {
- $pve_std_chains-> {'PVEFW-logflags'} = [ "-j DROP" ];
- }
+ $chain = 'PVEFW-logflags';
+ # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
+ push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
+ push @{$pve_std_chains->{$chain}}, "-j DROP";
foreach my $chain (keys %$pve_std_chains) {
ruleset_create_chain($ruleset, $chain);
return $res;
}
-sub compile {
- my $vmdata = read_local_vm_config();
- my $vmfw_configs = read_vm_firewall_configs($vmdata);
-
- my $routing_table = read_proc_net_route();
+sub load_security_groups {
my $groups_conf = {};
my $filename = "/etc/pve/firewall/groups.fw";
$groups_conf = parse_group_fw_rules($filename, $fh);
}
+ return $groups_conf;
+}
+
+sub load_hostfw_conf {
+
+ 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;
+}
+
+sub compile {
+ my $vmdata = read_local_vm_config();
+ my $vmfw_configs = read_vm_firewall_configs($vmdata);
+
+ my $routing_table = read_proc_net_route();
+
+ my $groups_conf = load_security_groups();
+
my $ruleset = {};
ruleset_create_chain($ruleset, "PVEFW-INPUT");
ruleset_create_chain($ruleset, "PVEFW-FORWARD");
- my $hostfw_options = {};
- my $hostfw_conf = {};
-
- $filename = "/etc/pve/local/host.fw";
- if (my $fh = IO::File->new($filename, O_RDONLY)) {
- $hostfw_conf = parse_host_fw_rules($filename, $fh);
- $hostfw_options = $hostfw_conf->{options};
- }
+ my $hostfw_conf = load_hostfw_conf();
+ my $hostfw_options = $hostfw_conf->{options} || {};
generate_std_chains($ruleset, $hostfw_options);
generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
my $macaddr = $net->{macaddr};
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
+ generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, $bridge, 'IN');
+ generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, $bridge, 'OUT');
}
}
generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
- my $macaddr = $d->{host_mac};
+ my $macaddr = $d->{mac};
my $iface = $d->{host_ifname};
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
- generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
+ generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, $bridge, 'IN');
+ generate_tap_rules_direction($ruleset, $groups_conf, $iface, $netid, $macaddr,
+ $vmfw_conf, $vmid, $bridge, 'OUT');
}
}
}
- # fixme: this is an optimization? if so, we should also drop INVALID packages?
- ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
-
# fixme: what log level should we use here?
my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
# disable interbridge routing
ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j LOG --log-prefix \"PVEFW-FORWARD-dropped \" --log-level $loglevel");
+ ruleset_addlog($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");
projects / pve-firewall.git / blobdiff