my $pve_fw_parsed_macros;
my $pve_fw_preferred_macro_names = {};
+my $pve_std_chains = {
+ 'PVEFW-SET-ACCEPT-MARK' => [
+ "-j MARK --set-mark 1",
+ ],
+ 'PVEFW-DropBroadcast' => [
+ # same as shorewall 'Broadcast'
+ # simply DROP BROADCAST/MULTICAST/ANYCAST
+ # we can use this to reduce logging
+ { action => 'DROP', dsttype => 'BROADCAST' },
+ { action => 'DROP', dsttype => 'MULTICAST' },
+ { action => 'DROP', dsttype => 'ANYCAST' },
+ { 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 => '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",
+ ],
+ '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 => 'icmp', dport => 'fragmentation-needed' },
+ { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
+ # Drop packets with INVALID state
+ "-m conntrack --ctstate INVALID -j DROP",
+ # 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 => '1024:65535', sport => 137 },
+ { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
+ { 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",
+ # 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 => 'icmp', dport => 'fragmentation-needed' },
+ { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
+ # Drop packets with INVALID state
+ "-m conntrack --ctstate INVALID -j DROP",
+ # Drop Microsoft SMB noise
+ { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
+ { 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 => '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",
+ # Drop DNS replies
+ { action => 'DROP', proto => 'udp', sport => 53 },
+ ],
+};
+
+# iptables -p icmp -h
+my $icmp_type_names = {
+ any => 1,
+ 'echo-reply' => 1,
+ 'destination-unreachable' => 1,
+ 'network-unreachable' => 1,
+ 'host-unreachable' => 1,
+ 'protocol-unreachable' => 1,
+ 'port-unreachable' => 1,
+ 'fragmentation-needed' => 1,
+ 'source-route-failed' => 1,
+ 'network-unknown' => 1,
+ 'host-unknown' => 1,
+ 'network-prohibited' => 1,
+ 'host-prohibited' => 1,
+ 'TOS-network-unreachable' => 1,
+ 'TOS-host-unreachable' => 1,
+ 'communication-prohibited' => 1,
+ 'host-precedence-violation' => 1,
+ 'precedence-cutoff' => 1,
+ 'source-quench' => 1,
+ 'redirect' => 1,
+ 'network-redirect' => 1,
+ 'host-redirect' => 1,
+ 'TOS-network-redirect' => 1,
+ 'TOS-host-redirect' => 1,
+ 'echo-request' => 1,
+ 'router-advertisement' => 1,
+ 'router-solicitation' => 1,
+ 'time-exceeded' => 1,
+ 'ttl-zero-during-transit' => 1,
+ 'ttl-zero-during-reassembly' => 1,
+ 'parameter-problem' => 1,
+ 'ip-header-bad' => 1,
+ 'required-option-missing' => 1,
+ 'timestamp-request' => 1,
+ 'timestamp-reply' => 1,
+ 'address-mask-request' => 1,
+ 'address-mask-reply' => 1,
+};
+
sub get_firewall_macros {
return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
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 ($pon =~ m/^\d+$/){
}else{
die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
}
- $nbports++;
}
}
$cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
$cmd .= " -d $rule->{dest}" if $rule->{dest};
$cmd .= " -p $rule->{proto}" if $rule->{proto};
- $cmd .= " --match multiport" if $rule->{nbdport} && $rule->{nbdport} > 1;
- $cmd .= " --dport $rule->{dport}" if $rule->{dport};
- $cmd .= " --match multiport" if $rule->{nbsport} && $rule->{nbsport} > 1;
- $cmd .= " --sport $rule->{sport}" if $rule->{sport};
+
+ if (($rule->{nbdport} && $rule->{nbdport} > 1) ||
+ ($rule->{nbsport} && $rule->{nbsport} > 1)) {
+ $cmd .= " --match multiport"
+ }
+
+ if ($rule->{dport}) {
+ if ($rule->{proto} && $rule->{proto} eq 'icmp') {
+ # Note: we use dport to store --icmp-type
+ die "unknown icmp-type\n" if !$icmp_type_names->{$rule->{dport}};
+ $cmd .= " -m icmp --icmp-type $rule->{dport}";
+ } else {
+ if ($rule->{nbdport} && $rule->{nbdport} > 1) {
+ $cmd .= " --dports $rule->{dport}";
+ } else {
+ $cmd .= " --dport $rule->{dport}";
+ }
+ }
+ }
+
+ if ($rule->{sport}) {
+ if ($rule->{nbsport} && $rule->{nbsport} > 1) {
+ $cmd .= " --sports $rule->{sport}";
+ } else {
+ $cmd .= " --sport $rule->{sport}";
+ }
+ }
+
+ $cmd .= " -m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
if (my $action = $rule->{action}) {
$goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
return $rules;
}
+sub generate_std_chains {
+ my ($ruleset) = @_;
+
+ 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);
+ }
+ }
+ }
+}
+
sub compile {
my $vmdata = read_local_vm_config();
my $rules = read_vm_firewall_rules($vmdata);
ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
ruleset_create_chain($ruleset, "PVEFW-FORWARD");
- ruleset_create_chain($ruleset, "PVEFW-SET-ACCEPT-MARK");
- ruleset_addrule($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1");
+ generate_std_chains($ruleset);
my $enable_hostfw = 0;
$filename = "/etc/pve/local/host.fw";
projects / pve-firewall.git / blobdiff