my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
-# todo: define more MACROS
# imported/converted from: /usr/share/shorewall/macro.*
my $pve_fw_macros = {
'Amanda' => [
sub get_firewall_macros {
return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
-
+
$pve_fw_parsed_macros = {};
foreach my $k (keys %$pve_fw_macros) {
if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
$services->{byid}->{$2}->{name} = $1;
+ $services->{byid}->{$2}->{port} = $2;
$services->{byid}->{$2}->{$3} = 1;
$services->{byname}->{$1} = $services->{byid}->{$2};
}
close($fh);
- $etc_services = $services;
-
+ $etc_services = $services;
+
return $etc_services;
}
my $nbports = 0;
foreach my $item (split(/,/, $str)) {
my $portlist = "";
+ my $oldpon = undef;
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};
}
return 1 if $name =~ m/^PVEFW-\S+$/;
return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
- return 1 if $name =~ m/^vmbr\d+-(:?IN|OUT)$/;
+ return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT)$/;
return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
return undef;
sub generate_bridge_chains {
my ($ruleset, $bridge) = @_;
- if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-IN")){
- ruleset_create_chain($ruleset, "PVEFW-BRIDGE-IN");
- }
-
- if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-OUT")){
- ruleset_create_chain($ruleset, "PVEFW-BRIDGE-OUT");
- }
-
if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
ruleset_create_chain($ruleset, "PVEFW-FORWARD");
-
ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN");
}
- if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
- ruleset_create_chain($ruleset, "$bridge-IN");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
- ruleset_addrule($ruleset, "PVEFW-BRIDGE-IN", "-j $bridge-IN");
- ruleset_addrule($ruleset, "$bridge-IN", "-j ACCEPT");
+ if (!ruleset_chain_exist($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 $bridge -j DROP"); # disable interbridge routing
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
}
if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
ruleset_create_chain($ruleset, "$bridge-OUT");
- ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
- ruleset_addrule($ruleset, "PVEFW-BRIDGE-OUT", "-j $bridge-OUT");
+ ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-bridged --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, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
}
}
sub generate_tap_rules_direction {
- my ($ruleset, $group_rules, $iface, $netid, $macaddr, $rules, $bridge, $direction) = @_;
+ my ($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, $direction) = @_;
+
+ my $rules = $vmfw_conf->{lc($direction)};
+ my $options = $vmfw_conf->{options};
my $tapchain = "$iface-$direction";
generate_group_rules($ruleset, $group_rules, $2);
}
ruleset_generate_rule($ruleset, $tapchain, $rule);
- ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -g $bridge-IN")
+ ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -j RETURN")
if $direction eq 'OUT';
} else {
- $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
+ $rule->{action} = "PVEFW-SET-ACCEPT-MARK" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
ruleset_generate_rule($ruleset, $tapchain, $rule);
}
}
}
- ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
- ruleset_addrule($ruleset, $tapchain, "-j DROP");
+ # implement policy
+ my $policy;
+
+ if ($direction eq 'OUT') {
+ $policy = $options->{'policy-out'} || 'ACCEPT'; # allow everything by default
+ } else {
+ $policy = $options->{'policy-in'} || 'DROP'; # allow everything by default
+ }
+
+ if ($policy eq 'ACCEPT') {
+ if ($direction eq 'OUT') {
+ ruleset_addrule($ruleset, $tapchain, "-g PVEFW-SET-ACCEPT-MARK");
+ } else {
+ ruleset_addrule($ruleset, $tapchain, "-j ACCEPT");
+ }
+ } elsif ($policy eq 'DROP') {
+ ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
+ ruleset_addrule($ruleset, $tapchain, "-j DROP");
+ } elsif ($policy eq 'REJECT') {
+ ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-reject: \" --log-level 4");
+ ruleset_addrule($ruleset, $tapchain, "-j REJECT");
+ } else {
+ # should not happen
+ die "internal error: unknown policy '$policy'";
+ }
# plug the tap chain to bridge chain
my $physdevdirection = $direction eq 'IN' ? "out" : "in";
ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
ruleset_addrule($ruleset, $chain, "-j DROP");
-
+
ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
}
my $rules = $group_rules->{$group};
die "no such security group '$group'\n" if !$rules;
-
+
my $chain = "GROUP-${group}-IN";
ruleset_create_chain($ruleset, $chain);
if ($rules->{out}) {
foreach my $rule (@{$rules->{out}}) {
- # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
- # check also other tap rules (and group rules can be set on any bridge,
+ # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to
+ # check also other tap rules (and group rules can be set on any bridge,
# so we can't go to VMBRXX-IN)
$rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT';
ruleset_generate_rule($ruleset, $chain, $rule);
if ($need_iface) {
$iface = undef if $iface && $iface eq '-';
- die "unknown interface '$iface'\n"
+ die "unknown interface '$iface'\n"
if defined($iface) && !$valid_netdev_names->{$iface};
}
$proto = undef if $proto && $proto eq '-';
- die "unknown protokol '$proto'\n" if $proto &&
+ die "unknown protokol '$proto'\n" if $proto &&
!(defined($protocols->{byname}->{$proto}) ||
defined($protocols->{byid}->{$proto}));
$nbsource = parse_address_list($source) if $source;
$nbdest = parse_address_list($dest) if $dest;
-
+
my $rules = [];
my $param = {
}
foreach my $rule (@$rules) {
- $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
+ $rule->{nbdport} = parse_port_name_number_or_range($rule->{dport})
if defined($rule->{dport});
- $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
+ $rule->{nbsport} = parse_port_name_number_or_range($rule->{sport})
if defined($rule->{sport});
}
return $rules;
}
+sub parse_fw_option {
+ my ($line) = @_;
+
+ my ($opt, $value);
+
+ if ($line =~ m/^enable:\s*(0|1)\s*$/i) {
+ $opt = 'enable';
+ $value = int($1);
+ } elsif ($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"
+ }
+
+ return ($opt, $value);
+}
+
sub parse_vm_fw_rules {
my ($filename, $fh) = @_;
- my $res = { in => [], out => [] };
+ my $res = { in => [], out => [], options => {}};
my $section;
my $linenr = $fh->input_line_number();
my $prefix = "$filename (line $linenr)";
- if ($line =~ m/^\[(in|out)\]\s*$/i) {
+ if ($line =~ m/^\[(\S+)\]\s*$/i) {
$section = lc($1);
+ warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
next;
}
if (!$section) {
next;
}
+ next if !$res->{$section}; # skip undefined section
+
+ if ($section eq 'options') {
+ eval {
+ my ($opt, $value) = parse_fw_option($line);
+ $res->{options}->{$opt} = $value;
+ };
+ warn "$prefix: $@" if $@;
+ next;
+ }
+
my $rules;
eval { $rules = parse_fw_rule($line, 1, 1); };
if (my $err = $@) {
my $group;
my $res = { in => [], out => [] };
-
+
while (defined(my $line = <$fh>)) {
next if $line =~ m/^#/;
next if $line =~ m/^\s*$/;
sub compile {
my $vmdata = read_local_vm_config();
my $rules = read_vm_firewall_rules($vmdata);
-
+
my $group_rules = {};
my $filename = "/etc/pve/firewall/groups.fw";
if (my $fh = IO::File->new($filename, O_RDONLY)) {
my $ruleset = {};
- # setup host firewall rules
ruleset_create_chain($ruleset, "PVEFW-INPUT");
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");
+ my $enable_hostfw = 0;
$filename = "/etc/pve/local/host.fw";
if (my $fh = IO::File->new($filename, O_RDONLY)) {
my $host_rules = parse_host_fw_rules($filename, $fh);
+
+ $enable_hostfw = 1;
+
enablehostfw($ruleset, $host_rules, $group_rules);
}
- # generate firewall rules for QEMU VMs
+ # generate firewall rules for QEMU VMs
foreach my $vmid (keys %{$vmdata->{qemu}}) {
my $conf = $vmdata->{qemu}->{$vmid};
- next if !$rules->{$vmid};
+ my $vmfw_conf = $rules->{$vmid};
+ next if !$vmfw_conf;
+ next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
foreach my $netid (keys %$conf) {
next if $netid !~ m/^net(\d+)$/;
$bridge .= "v$net->{tag}" if $net->{tag};
+
generate_bridge_chains($ruleset, $bridge);
my $macaddr = $net->{macaddr};
- generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{in}, $bridge, 'IN');
- generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{out}, $bridge, 'OUT');
+ generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'IN');
+ generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $vmfw_conf, $bridge, 'OUT');
}
}
- # allow traffic from lo (ourself)
- ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
+ if ($enable_hostfw) {
+ # allow traffic from lo (ourself)
+ ruleset_addrule($ruleset, "PVEFW-INPUT", "-i lo -j ACCEPT");
+ }
return $ruleset;
}
$statushash->{$chain}->{sig} = $sig;
print "delete $chain ($sig)\n" if $verbose;
}
- }
+ }
return $statushash;
}
}
foreach my $chain (keys %$statushash) {
next if $statushash->{$chain}->{action} ne 'delete';
+ next if $chain eq 'PVEFW-INPUT';
+ next if $chain eq 'PVEFW-OUTPUT';
+ next if $chain eq 'PVEFW-FORWARD';
$cmdlist .= "-X $chain\n";
}
iptables_restore_cmdlist($cmdlist);
- # test: re-read status and check if everything is up to date
+ # test: re-read status and check if everything is up to date
$statushash = get_ruleset_status($ruleset);
my $errors;
projects / pve-firewall.git / blobdiff