2 ###############################################################################
4 # IPFire.org - A linux based firewall #
5 # Copyright (C) 2007-2020 IPFire Team <info@ipfire.org> #
7 # This program is free software: you can redistribute it and/or modify #
8 # it under the terms of the GNU General Public License as published by #
9 # the Free Software Foundation, either version 3 of the License, or #
10 # (at your option) any later version. #
12 # This program is distributed in the hope that it will be useful, #
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of #
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
15 # GNU General Public License for more details. #
17 # You should have received a copy of the GNU General Public License #
18 # along with this program. If not, see <http://www.gnu.org/licenses/>. #
20 ###############################################################################
23 use experimental
'smartmatch';
25 require '/var/ipfire/general-functions.pl';
26 require "${General::swroot}/lang.pl";
27 require "/usr/lib/firewall/firewall-lib.pl";
28 require "${General::swroot}/location-functions.pl";
30 # Set to one to enable debugging mode.
33 my $IPTABLES = "iptables --wait";
37 my $CHAIN_INPUT = "INPUTFW";
38 my $CHAIN_FORWARD = "FORWARDFW";
39 my $CHAIN_OUTPUT = "OUTGOINGFW";
40 my $CHAIN = $CHAIN_FORWARD;
41 my $CHAIN_NAT_SOURCE = "NAT_SOURCE";
42 my $CHAIN_NAT_DESTINATION = "NAT_DESTINATION";
43 my $CHAIN_MANGLE_NAT_DESTINATION_FIX = "NAT_DESTINATION";
44 my @VALID_CHAINS = ($CHAIN_INPUT, $CHAIN_FORWARD, $CHAIN_OUTPUT);
45 my @ANY_ADDRESSES = ("0.0.0.0/0.0.0.0", "0.0.0.0/0", "0/0");
47 my @PROTOCOLS = ("tcp", "udp", "icmp", "igmp", "ah", "esp", "gre", "ipv6", "ipip");
48 my @PROTOCOLS_WITH_PORTS = ("tcp", "udp");
50 my @VALID_TARGETS = ("ACCEPT", "DROP", "REJECT");
52 my @PRIVATE_NETWORKS = (
60 my $NAT_MASK = 0x0f000000;
64 my %defaultNetworks=();
68 my %configoutgoingfw=();
70 my %locationsettings = (
71 "LOCATIONBLOCK_ENABLED" => "off"
76 my $configfwdfw = "${General::swroot}/firewall/config";
77 my $configinput = "${General::swroot}/firewall/input";
78 my $configoutgoing = "${General::swroot}/firewall/outgoing";
79 my $p2pfile = "${General::swroot}/firewall/p2protocols";
80 my $locationfile = "${General::swroot}/firewall/locationblock";
81 my $configgrp = "${General::swroot}/fwhosts/customgroups";
82 my $netsettings = "${General::swroot}/ethernet/settings";
84 &General
::readhash
("${General::swroot}/firewall/settings", \
%fwdfwsettings);
85 &General
::readhash
("${General::swroot}/optionsfw/settings", \
%fwoptions);
86 &General
::readhash
("$netsettings", \
%defaultNetworks);
87 &General
::readhasharray
($configfwdfw, \
%configfwdfw);
88 &General
::readhasharray
($configinput, \
%configinputfw);
89 &General
::readhasharray
($configoutgoing, \
%configoutgoingfw);
90 &General
::readhasharray
($configgrp, \
%customgrp);
92 # Check if the location settings file exists
93 if (-e
"$locationfile") {
95 &General
::readhash
("$locationfile", \
%locationsettings);
98 # Get all available locations.
99 my @locations = &Location
::Functions
::get_locations
();
101 my @log_limit_options = &make_log_limit_options
();
103 my $POLICY_INPUT_ALLOWED = 0;
104 my $POLICY_FORWARD_ALLOWED = ($fwdfwsettings{"POLICY"} eq "MODE2");
105 my $POLICY_OUTPUT_ALLOWED = ($fwdfwsettings{"POLICY1"} eq "MODE2");
107 my $POLICY_INPUT_ACTION = $fwoptions{"FWPOLICY2"};
108 my $POLICY_FORWARD_ACTION = $fwoptions{"FWPOLICY"};
109 my $POLICY_OUTPUT_ACTION = $fwoptions{"FWPOLICY1"};
118 # Destroy all existing ipsets.
119 run
("$IPSET destroy");
121 # Prepare firewall rules.
122 if (! -z
"${General::swroot}/firewall/input"){
123 &buildrules
(\
%configinputfw);
125 if (! -z
"${General::swroot}/firewall/outgoing"){
126 &buildrules
(\
%configoutgoingfw);
128 if (! -z
"${General::swroot}/firewall/config"){
129 &buildrules
(\
%configfwdfw);
132 # Load P2P block rules.
135 # Load Location block rules.
138 # Reload firewall policy.
139 run
("/usr/sbin/firewall-policy");
141 #Reload firewall.local if present
142 if ( -f
'/etc/sysconfig/firewall.local'){
143 run
("/etc/sysconfig/firewall.local reload");
148 # Executes or prints the given shell command.
157 print_error
("ERROR: $command");
165 print STDERR
"$message\n";
175 printf(" %2d: %s", $i++, $_);
183 return scalar @
$hash;
187 run
("$IPTABLES -F $CHAIN_INPUT");
188 run
("$IPTABLES -F $CHAIN_FORWARD");
189 run
("$IPTABLES -F $CHAIN_OUTPUT");
190 run
("$IPTABLES -t nat -F $CHAIN_NAT_SOURCE");
191 run
("$IPTABLES -t nat -F $CHAIN_NAT_DESTINATION");
192 run
("$IPTABLES -t mangle -F $CHAIN_MANGLE_NAT_DESTINATION_FIX");
194 # Flush LOCATIONBLOCK chain.
195 run
("$IPTABLES -F LOCATIONBLOCK");
201 # Search for targets that need to be specially handled when adding
202 # forwarding rules. Additional rules will automatically get inserted
203 # into the INPUT/OUTPUT chains for these targets.
204 my @special_input_targets = ();
205 if (!$POLICY_FORWARD_ALLOWED) {
206 push(@special_input_targets, "ACCEPT");
209 if ($POLICY_INPUT_ACTION eq "DROP") {
210 push(@special_input_targets, ("ACCEPT", "REJECT"));
211 } elsif ($POLICY_INPUT_ACTION eq "REJECT") {
212 push(@special_input_targets, ("ACCEPT", "DROP"));
215 my @special_output_targets = ();
216 if ($POLICY_OUTPUT_ALLOWED) {
217 push(@special_output_targets, ("DROP", "REJECT"));
219 push(@special_output_targets, "ACCEPT");
221 if ($POLICY_OUTPUT_ACTION eq "DROP") {
222 push(@special_output_targets, ("ACCEPT", "REJECT"));
223 } elsif ($POLICY_OUTPUT_ACTION eq "REJECT") {
224 push(@special_output_targets, ("ACCEPT", "DROP"));
228 foreach my $key (sort {$a <=> $b} keys %$hash) {
229 # Skip disabled rules.
230 next unless ($$hash{$key}[2] eq 'ON');
232 # Count number of elements in this line
233 my $elements = &count_elements
($$hash{$key});
236 print_rule
($$hash{$key});
239 # Check if the target is valid.
240 my $target = $$hash{$key}[0];
241 if (!$target ~~ @VALID_TARGETS) {
242 print_error
("Invalid target '$target' for rule $key");
246 # Check if the chain is valid.
247 my $chain = $$hash{$key}[1];
248 if (!$chain ~~ @VALID_CHAINS) {
249 print_error
("Invalid chain '$chain' in rule $key");
253 # Collect all sources.
254 my @sources = &fwlib
::get_addresses
($hash, $key, "src");
256 # Collect all destinations.
257 my @destinations = &fwlib
::get_addresses
($hash, $key, "tgt");
259 # True if the destination is the firewall itself.
260 my $destination_is_firewall = ($$hash{$key}[5] eq "ipfire");
262 # Check if logging should be enabled.
263 my $LOG = ($$hash{$key}[17] eq 'ON');
265 # Check if NAT is enabled and initialize variables, that we use for that.
266 my $NAT = ($$hash{$key}[28] eq 'ON');
269 $NAT_MODE = uc($$hash{$key}[31]);
272 # Set up time constraints.
273 my @time_options = ();
274 if ($$hash{$key}[18] eq 'ON') {
275 push(@time_options, ("-m", "time"));
277 # Select all days of the week this match is active.
279 if ($$hash{$key}[19] ne '') {
280 push (@weekdays, "Mon");
282 if ($$hash{$key}[20] ne '') {
283 push (@weekdays, "Tue");
285 if ($$hash{$key}[21] ne '') {
286 push (@weekdays, "Wed");
288 if ($$hash{$key}[22] ne '') {
289 push (@weekdays, "Thu");
291 if ($$hash{$key}[23] ne '') {
292 push (@weekdays, "Fri");
294 if ($$hash{$key}[24] ne '') {
295 push (@weekdays, "Sat");
297 if ($$hash{$key}[25] ne '') {
298 push (@weekdays, "Sun");
301 push(@time_options, ("--weekdays", join(",", @weekdays)));
304 # Convert start time.
305 my $time_start = &format_time
($$hash{$key}[26]);
307 push(@time_options, ("--timestart", $time_start));
311 my $time_stop = &format_time
($$hash{$key}[27]);
313 push(@time_options, ("--timestop", $time_stop));
317 # Concurrent connection limit
318 my @ratelimit_options = ();
320 if (($elements ge 34) && ($$hash{$key}[32] eq 'ON')) {
321 my $conn_limit = $$hash{$key}[33];
323 if ($conn_limit ge 1) {
324 push(@ratelimit_options, ("-m", "connlimit"));
326 # Use the the entire source IP address
327 push(@ratelimit_options, "--connlimit-saddr");
328 push(@ratelimit_options, ("--connlimit-mask", "32"));
331 push(@ratelimit_options, ("--connlimit-upto", $conn_limit));
336 if (($elements ge 37) && ($$hash{$key}[34] eq 'ON')) {
337 my $rate_limit = "$$hash{$key}[35]/$$hash{$key}[36]";
340 push(@ratelimit_options, ("-m", "limit"));
341 push(@ratelimit_options, ("--limit", $rate_limit));
345 # Check which protocols are used in this rule and so that we can
346 # later group rules by protocols.
347 my @protocols = &get_protocols
($hash, $key);
349 print_error
("Invalid protocol configuration for rule $key");
353 foreach my $protocol (@protocols) {
354 # Check if the given protocol is supported.
355 if (($protocol ne "all") && (!$protocol ~~ @PROTOCOLS)) {
356 print_error
("Protocol $protocol is not supported (rule $key)");
360 # Prepare protocol options (like ICMP types, ports, etc...).
361 my @protocol_options = &get_protocol_options
($hash, $key, $protocol, 0);
363 # Check if this protocol knows ports.
364 my $protocol_has_ports = ($protocol ~~ @PROTOCOLS_WITH_PORTS);
366 foreach my $src (@sources) {
367 # Skip invalid source.
368 next unless (defined $src);
372 my $source = @
$src[0];
373 if ($source ~~ @ANY_ADDRESSES) {
377 my $source_intf = @
$src[1];
379 foreach my $dst (@destinations) {
380 # Skip invalid rules.
381 next unless (defined $dst);
382 next if (!$dst || ($dst eq "none"));
384 # Sanitize destination.
385 my $destination = @
$dst[0];
386 if ($destination ~~ @ANY_ADDRESSES) {
390 my $destination_intf = @
$dst[1];
392 # Array with iptables arguments.
396 if ($protocol ne "all") {
397 push(@options, @protocol_options);
400 # Prepare source options.
401 my @source_options = ();
402 if ($source =~ /mac/) {
403 push(@source_options, $source);
404 } elsif ($source =~ /-m geoip/) {
405 push(@source_options, $source);
407 push(@source_options, ("-s", $source));
410 # Prepare destination options.
411 my @destination_options = ();
412 if ($destination =~ /-m geoip/) {
413 push(@destination_options, $destination);
414 } elsif ($destination) {
415 push(@destination_options, ("-d", $destination));
418 # Add source and destination interface to the filter rules.
419 # These are supposed to help filtering forged packets that originate
420 # from BLUE with an IP address from GREEN for instance.
421 my @source_intf_options = ();
423 push(@source_intf_options, ("-i", $source_intf));
426 my @destination_intf_options = ();
427 if ($destination_intf) {
428 push(@destination_intf_options, ("-o", $destination_intf));
431 # Add time constraint options.
432 push(@options, @time_options);
434 # Add ratelimiting option
435 push(@options, @ratelimit_options);
437 my $firewall_is_in_source_subnet = 1;
439 $firewall_is_in_source_subnet = &firewall_is_in_subnet
($source);
442 my $firewall_is_in_destination_subnet = 1;
444 $firewall_is_in_destination_subnet = &firewall_is_in_subnet
($destination);
449 my $nat_address = &fwlib
::get_nat_address
($$hash{$key}[29], $source);
451 # Skip NAT rules if the NAT address is unknown
452 # (i.e. no internet connection has been established, yet).
453 next unless ($nat_address);
456 if ($NAT_MODE eq "DNAT") {
457 my @nat_options = ();
458 if ($protocol ne "all") {
459 my @nat_protocol_options = &get_protocol_options
($hash, $key, $protocol, 1);
460 push(@nat_options, @nat_protocol_options);
464 push(@nat_options, @time_options);
466 # Determine if a REDIRECT rule should be created.
467 my $use_redirect = ($destination_is_firewall && !$destination && $protocol_has_ports);
469 # Make port-forwardings useable from the internal networks.
470 if (!$use_redirect) {
471 my @internal_addresses = &fwlib
::get_internal_firewall_ip_addresses
(1);
472 unless ($nat_address ~~ @internal_addresses) {
473 &add_dnat_mangle_rules
($nat_address, $source_intf, @nat_options);
477 # Add source options.
478 push(@nat_options, @source_options);
481 if (!$use_redirect) {
482 push(@nat_options, ("-d", $nat_address));
486 if ($protocol_has_ports) {
487 $dnat_port = &get_dnat_target_port
($hash, $key);
490 my @nat_action_options = ();
492 # Use iptables REDIRECT
494 push(@nat_action_options, ("-j", "REDIRECT"));
496 # Redirect to specified port if one has given.
498 push(@nat_action_options, ("--to-ports", $dnat_port));
503 if ($destination_is_firewall && !$destination) {
504 $destination = &fwlib
::get_external_address
();
506 next unless ($destination);
508 my ($dnat_address, $dnat_mask) = split("/", $destination);
509 @destination_options = ("-d", $dnat_address);
511 if ($protocol_has_ports) {
512 my $dnat_port = &get_dnat_target_port
($hash, $key);
515 $dnat_address .= ":$dnat_port";
519 push(@nat_action_options, ("-j", "DNAT", "--to-destination", $dnat_address));
523 run
("$IPTABLES -t nat -A $CHAIN_NAT_DESTINATION @nat_options @log_limit_options -j LOG --log-prefix 'DNAT '");
525 run
("$IPTABLES -t nat -A $CHAIN_NAT_DESTINATION @nat_options @nat_action_options");
528 } elsif ($NAT_MODE eq "SNAT") {
529 my @snat_options = ( "-m", "policy", "--dir", "out", "--pol", "none" );
530 my @nat_options = @options;
532 # Get addresses for the configured firewall interfaces.
533 my @local_addresses = &fwlib
::get_internal_firewall_ip_addresses
(1);
535 # Check if the nat_address is one of the local addresses.
536 foreach my $local_address (@local_addresses) {
537 if ($nat_address eq $local_address) {
538 # Clear SNAT options.
546 push(@nat_options, @destination_intf_options);
547 push(@nat_options, @source_options);
548 push(@nat_options, @destination_options);
551 run
("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options @snat_options @log_limit_options -j LOG --log-prefix 'SNAT '");
553 run
("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options @snat_options -j SNAT --to-source $nat_address");
557 push(@options, @source_options);
558 push(@options, @destination_options);
560 # Insert firewall rule.
562 run
("$IPTABLES -A $chain @options @source_intf_options @destination_intf_options @log_limit_options -j LOG --log-prefix '$chain '");
564 run
("$IPTABLES -A $chain @options @source_intf_options @destination_intf_options -j $target");
566 # Handle forwarding rules and add corresponding rules for firewall access.
567 if ($chain eq $CHAIN_FORWARD) {
568 # If the firewall is part of the destination subnet and access to the destination network
569 # is granted/forbidden for any network that the firewall itself is part of, we grant/forbid access
570 # for the firewall, too.
571 if ($firewall_is_in_destination_subnet && ($target ~~ @special_input_targets)) {
573 run
("$IPTABLES -A $CHAIN_INPUT @options @source_intf_options @log_limit_options -j LOG --log-prefix '$CHAIN_INPUT '");
575 run
("$IPTABLES -A $CHAIN_INPUT @options @source_intf_options -j $target");
579 if ($firewall_is_in_source_subnet && ($target ~~ @special_output_targets)) {
581 run
("$IPTABLES -A $CHAIN_OUTPUT @options @destination_intf_options @log_limit_options -j LOG --log-prefix '$CHAIN_OUTPUT '");
583 run
("$IPTABLES -A $CHAIN_OUTPUT @options @destination_intf_options -j $target");
592 # Formats the given timestamp into the iptables format which is "hh:mm" UTC.
596 # Convert the given time into minutes.
597 my $minutes = &time_convert_to_minutes
($val);
599 # Move the timestamp into UTC.
600 $minutes += &time_utc_offset
();
602 # Make sure $minutes is between 00:00 and 23:59.
607 if ($minutes > 1440) {
612 return sprintf("%02d:%02d", $minutes / 60, $minutes % 60);
615 # Calculates the offsets in minutes from the local timezone to UTC.
616 sub time_utc_offset
{
617 my @localtime = localtime(time);
618 my @gmtime = gmtime(time);
620 return ($gmtime[2] * 60 + $gmtime[1] % 60) - ($localtime[2] * 60 + $localtime[1] % 60);
623 # Takes a timestamp like "14:00" and converts it into minutes since midnight.
624 sub time_convert_to_minutes
{
625 my ($hrs, $min) = split(":", shift);
627 return ($hrs * 60) + $min;
631 open(FILE
, "<$p2pfile") or die "Unable to read $p2pfile";
633 foreach my $p2pentry (<FILE
>) {
634 my @p2pline = split(/\;/, $p2pentry);
635 next unless ($p2pline[2] eq "off");
637 push(@protocols, "--$p2pline[1]");
641 run
("$IPTABLES -F P2PBLOCK");
643 run
("$IPTABLES -A P2PBLOCK -m ipp2p @protocols -j DROP");
648 # The LOCATIONBLOCK chain now gets flushed by the flush() function.
650 # If location blocking is not enabled, we are finished here.
651 if ($locationsettings{'LOCATIONBLOCK_ENABLED'} ne "on") {
652 # Exit submodule. Process remaining script.
656 # Only check the RED interface, which is ppp0 in case of RED_TYPE being
657 # set to "PPPOE", and red0 in case of RED_TYPE not being empty otherwise.
658 if ($defaultNetworks{'RED_TYPE'} eq "PPPOE") {
659 run
("$IPTABLES -A LOCATIONBLOCK ! -i ppp0 -j RETURN");
660 } elsif ($defaultNetworks{'RED_DEV'} ne "") {
661 run
("$IPTABLES -A LOCATIONBLOCK ! -i $defaultNetworks{'RED_DEV'} -j RETURN");
664 # Do not check any private address space
665 foreach my $network (@PRIVATE_NETWORKS) {
666 run
("$IPTABLES -A LOCATIONBLOCK -s $network -j RETURN");
669 # Loop through all supported locations and
670 # create iptables rules, if blocking for this country
672 foreach my $location (@locations) {
673 if(exists $locationsettings{$location} && $locationsettings{$location} eq "on") {
674 run
("$IPTABLES -A LOCATIONBLOCK -m geoip --src-cc $location -j DROP");
683 my $uses_source_ports = ($$hash{$key}[7] eq "ON");
684 my $uses_services = ($$hash{$key}[11] eq "ON");
688 # Rules which don't have source ports or services (like ICMP, ESP, ...).
689 if (!$uses_source_ports && !$uses_services) {
690 push(@protocols, $$hash{$key}[8]);
692 # Rules which either use ports or services.
693 } elsif ($uses_source_ports || $uses_services) {
694 # Check if service group or service
695 if ($$hash{$key}[14] eq 'cust_srv') {
696 push(@protocols, &fwlib
::get_srv_prot
($$hash{$key}[15]));
698 } elsif($$hash{$key}[14] eq 'cust_srvgrp'){
699 my $protos = &fwlib
::get_srvgrp_prot
($$hash{$key}[15]);
700 push(@protocols, split(",", $protos));
703 # Fetch the protocol for this rule.
704 my $protocol = lc($$hash{$key}[8]);
706 # Fetch source and destination ports for this rule.
707 my $source_ports = $$hash{$key}[10];
708 my $destination_ports = $$hash{$key}[15];
710 # Check if ports are set for protocols which do not support ports.
711 if (!($protocol ~~ @PROTOCOLS_WITH_PORTS) && ($source_ports || $destination_ports)) {
712 print_error
("$protocol does not support ports");
716 push(@protocols, $protocol);
720 # Remove all empty elements
721 @protocols = map { $_ ?
$_ : () } @protocols;
723 # If no protocol has been defined, we assume "all".
725 push(@protocols, "all");
728 # Make all protocol names lowercase.
729 @protocols = map { lc } @protocols;
734 sub get_protocol_options
{
737 my $protocol = shift;
738 my $nat_options_wanted = shift;
741 # Nothing to do if no protocol is specified.
742 if ($protocol eq "all") {
745 push(@options, ("-p", $protocol));
748 if ($protocol ~~ @PROTOCOLS_WITH_PORTS) {
749 # Process source ports.
750 my $use_src_ports = ($$hash{$key}[7] eq "ON");
751 my $src_ports = $$hash{$key}[10];
753 if ($use_src_ports && $src_ports) {
754 push(@options, &format_ports
($src_ports, "src"));
757 # Process destination ports.
758 my $use_dst_ports = ($$hash{$key}[11] eq "ON");
759 my $use_dnat = (($$hash{$key}[28] eq "ON") && ($$hash{$key}[31] eq "dnat"));
761 if ($use_dst_ports) {
762 my $dst_ports_mode = $$hash{$key}[14];
763 my $dst_ports = $$hash{$key}[15];
765 if (($dst_ports_mode eq "TGT_PORT") && $dst_ports) {
766 if ($nat_options_wanted && $use_dnat && $$hash{$key}[30]) {
767 $dst_ports = $$hash{$key}[30];
769 push(@options, &format_ports
($dst_ports, "dst"));
771 } elsif ($dst_ports_mode eq "cust_srv") {
772 if ($protocol eq "ICMP") {
773 push(@options, ("--icmp-type", &fwlib
::get_srv_port
($dst_ports, 3, "ICMP")));
775 $dst_ports = &fwlib
::get_srv_port
($dst_ports, 1, uc($protocol));
776 push(@options, &format_ports
($dst_ports, "dst"));
779 } elsif ($dst_ports_mode eq "cust_srvgrp") {
780 push(@options, &fwlib
::get_srvgrp_port
($dst_ports, uc($protocol)));
785 # Check if a single ICMP type is selected.
786 if ($protocol eq "icmp") {
787 my $icmp_type = $$hash{$key}[9];
789 if (($icmp_type ne "All ICMP-Types") && $icmp_type) {
790 push(@options, ("--icmp-type", $icmp_type));
802 if ($type eq "src") {
804 } elsif ($type eq "dst") {
810 if ($ports =~ /\|/) {
812 push(@options, ("-m", "multiport"));
816 push(@options, ($arg, $ports));
822 sub get_dnat_target_port
{
826 if ($$hash{$key}[14] eq "TGT_PORT") {
827 my $port = $$hash{$key}[15];
828 my $external_port = $$hash{$key}[30];
830 if ($external_port && ($port ne $external_port)) {
831 return $$hash{$key}[15];
836 sub add_dnat_mangle_rules
{
837 my $nat_address = shift;
838 my $interface = shift;
841 my $mark = 0x01000000;
842 foreach my $zone ("GREEN", "BLUE", "ORANGE") {
843 # Skip rule if not all required information exists.
844 next unless (exists $defaultNetworks{$zone . "_NETADDRESS"});
845 next unless (exists $defaultNetworks{$zone . "_NETMASK"});
847 next if ($interface && $interface ne $defaultNetworks{$zone . "_DEV"});
849 my @mangle_options = @options;
851 my $netaddress = $defaultNetworks{$zone . "_NETADDRESS"};
852 $netaddress .= "/" . $defaultNetworks{$zone . "_NETMASK"};
854 push(@mangle_options, ("-s", $netaddress, "-d", $nat_address));
855 push(@mangle_options, ("-j", "MARK", "--set-xmark", "$mark/$NAT_MASK"));
857 run
("$IPTABLES -t mangle -A $CHAIN_MANGLE_NAT_DESTINATION_FIX @mangle_options");
863 sub make_log_limit_options
{
864 my @options = ("-m", "limit");
866 # Maybe we should get this from the configuration.
869 # We limit log messages to $limit messages per second.
870 push(@options, ("--limit", "$limit/second"));
872 # And we allow bursts of 2x $limit.
873 push(@options, ("--limit-burst", $limit * 2));
878 sub firewall_is_in_subnet
{
881 # ORANGE is missing here, because nothing may ever access
882 # the firewall from this network.
883 my $address = &fwlib
::get_internal_firewall_ip_address
($subnet, 0);
892 sub ipset_restore
($) {
895 # Run ipset and restore the list of the given country code.
896 run
("$IPSET restore < $Location::Functions::ipset_db_directory/$ccode.ipset4");