my @VALID_TARGETS = ("ACCEPT", "DROP", "REJECT");
my %fwdfwsettings=();
+my %fwoptions = ();
my %defaultNetworks=();
my %configfwdfw=();;
my %customgrp=();
my $netsettings = "${General::swroot}/ethernet/settings";
&General::readhash("${General::swroot}/firewall/settings", \%fwdfwsettings);
+&General::readhash("${General::swroot}/optionsfw/settings", \%fwoptions);
&General::readhash("$netsettings", \%defaultNetworks);
&General::readhasharray($configfwdfw, \%configfwdfw);
&General::readhasharray($configinput, \%configinputfw);
my @log_limit_options = &make_log_limit_options();
+my $POLICY_INPUT_ALLOWED = 0;
+my $POLICY_FORWARD_ALLOWED = ($fwdfwsettings{"POLICY"} eq "MODE2");
+my $POLICY_OUTPUT_ALLOWED = ($fwdfwsettings{"POLICY1"} eq "MODE2");
+
+my $POLICY_INPUT_ACTION = $fwoptions{"FWPOLICY2"};
+my $POLICY_FORWARD_ACTION = $fwoptions{"FWPOLICY"};
+my $POLICY_OUTPUT_ACTION = $fwoptions{"FWPOLICY1"};
+
# MAIN
&main();
}
sub preparerules {
- if (! -z "${General::swroot}/firewall/config"){
- &buildrules(\%configfwdfw);
- }
if (! -z "${General::swroot}/firewall/input"){
&buildrules(\%configinputfw);
}
if (! -z "${General::swroot}/firewall/outgoing"){
&buildrules(\%configoutgoingfw);
}
+ if (! -z "${General::swroot}/firewall/config"){
+ &buildrules(\%configfwdfw);
+ }
}
sub buildrules {
my $hash = shift;
+ # Search for targets that need to be specially handled when adding
+ # forwarding rules. Additional rules will automatically get inserted
+ # into the INPUT/OUTPUT chains for these targets.
+ my @special_input_targets = ();
+ if (!$POLICY_FORWARD_ALLOWED) {
+ push(@special_input_targets, "ACCEPT");
+ }
+
+ if ($POLICY_INPUT_ACTION eq "DROP") {
+ push(@special_input_targets, "REJECT");
+ } elsif ($POLICY_INPUT_ACTION eq "REJECT") {
+ push(@special_input_targets, "DROP");
+ }
+
+ my @special_output_targets = ();
+ if ($POLICY_OUTPUT_ALLOWED) {
+ push(@special_output_targets, ("DROP", "REJECT"));
+ } else {
+ push(@special_output_targets, "ACCEPT");
+
+ if ($POLICY_OUTPUT_ACTION eq "DROP") {
+ push(@special_output_targets, "REJECT");
+ } elsif ($POLICY_OUTPUT_ACTION eq "REJECT") {
+ push(@special_output_targets, "DROP");
+ }
+ }
+
foreach my $key (sort {$a <=> $b} keys %$hash) {
# Skip disabled rules.
next unless ($$hash{$key}[2] eq 'ON');
# Add time constraint options.
push(@options, @time_options);
- my $firewall_is_in_source_subnet = 0;
+ my $firewall_is_in_source_subnet = 1;
if ($source) {
$firewall_is_in_source_subnet = &firewall_is_in_subnet($source);
}
+ my $firewall_is_in_destination_subnet = 1;
+ if ($destination) {
+ $firewall_is_in_destination_subnet = &firewall_is_in_subnet($destination);
+ }
+
# Process NAT rules.
if ($NAT) {
my $nat_address = &fwlib::get_nat_address($$hash{$key}[29], $source);
}
push(@options, @source_options);
-
- if ($firewall_is_in_source_subnet && ($fwdfwsettings{"POLICY"} eq "MODE1") && ($chain eq $CHAIN_FORWARD)) {
- if ($LOG && !$NAT) {
- run("$IPTABLES -A $CHAIN_INPUT @options @log_limit_options -j LOG --log-prefix '$CHAIN_INPUT '");
- }
- run("$IPTABLES -A $CHAIN_INPUT @options -j $target");
- }
-
push(@options, @destination_options);
# Insert firewall rule.
run("$IPTABLES -A $chain @options @log_limit_options -j LOG --log-prefix '$chain '");
}
run("$IPTABLES -A $chain @options -j $target");
+
+ # Handle forwarding rules and add corresponding rules for firewall access.
+ if ($chain eq $CHAIN_FORWARD) {
+ # If the firewall is part of the destination subnet and access to the destination network
+ # is granted/forbidden for any network that the firewall itself is part of, we grant/forbid access
+ # for the firewall, too.
+ if ($firewall_is_in_destination_subnet && ($target ~~ @special_input_targets)) {
+ if ($LOG && !$NAT) {
+ run("$IPTABLES -A $CHAIN_INPUT @options @log_limit_options -j LOG --log-prefix '$CHAIN_INPUT '");
+ }
+ run("$IPTABLES -A $CHAIN_INPUT @options -j $target");
+ }
+
+ # Likewise.
+ if ($firewall_is_in_source_subnet && ($target ~~ @special_output_targets)) {
+ if ($LOG && !$NAT) {
+ run("$IPTABLES -A $CHAIN_OUTPUT @options @log_limit_options -j LOG --log-prefix '$CHAIN_OUTPUT '");
+ }
+ run("$IPTABLES -A $CHAIN_OUTPUT @options -j $target");
+ }
+ }
}
}
}
return 0;
}
-