my $firewall_is_in_source_subnet = 0;
if ($source) {
- $firewall_is_in_source_subnet = &firewall_is_in_subnet($source);
+ $firewall_is_in_source_subnet = &firewall_is_in_subnet($source, 0);
}
# Process NAT rules.
if ($NAT) {
- my $nat_address = &get_nat_address($$hash{$key}[29]);
+ my $nat_address = &get_nat_address($$hash{$key}[29], $source);
# Skip NAT rules if the NAT address is unknown
# (i.e. no internet connection has been established, yet).
# Destination NAT
if ($NAT_MODE eq "DNAT") {
# Make port-forwardings useable from the internal networks.
- &add_dnat_mangle_rules($nat_address, @options);
+ my @internal_addresses = &get_internal_firewall_ip_addresses();
+ unless ($nat_address ~~ @internal_addresses) {
+ &add_dnat_mangle_rules($nat_address, @options);
+ }
my @nat_options = @options;
push(@nat_options, @source_options);
sub get_nat_address {
my $zone = shift;
+ my $source = shift;
# Any static address of any zone.
if ($zone eq "RED" || $zone eq "GREEN" || $zone eq "ORANGE" || $zone eq "BLUE") {
return $defaultNetworks{$zone . "_ADDRESS"};
} elsif ($zone eq "Default IP") {
+ if ($source) {
+ my $firewall_ip = &firewall_is_in_subnet($source, 1);
+
+ if ($firewall_ip) {
+ return $firewall_ip;
+ }
+ }
+
return &get_external_address();
} else {
return @options;
}
+sub get_internal_firewall_ip_addresses {
+ my @addresses = ();
+
+ for my $zone ("GREEN", "BLUE", "ORANGE") {
+ next unless (exists $defaultNetworks{$zone . "_ADDRESS"});
+
+ my $zone_address = $defaultNetworks{$zone . "_ADDRESS"};
+ push(@addresses, $zone_address);
+ }
+
+ return @addresses;
+}
+
sub firewall_is_in_subnet {
my $subnet = shift;
+ my $use_orange = shift;
my ($net_address, $net_mask) = split("/", $subnet);
if (!$net_mask) {
return 0;
}
+ my @zones = ("GREEN", "BLUE");
+ if ($use_orange) {
+ push(@zones, "ORANGE");
+ }
+
# ORANGE is missing here, because nothing may ever access
# the firewall from this network.
- foreach my $zone ("GREEN", "BLUE") {
+ foreach my $zone (@zones) {
next unless (exists $defaultNetworks{$zone . "_ADDRESS"});
my $zone_address = $defaultNetworks{$zone . "_ADDRESS"};
if (&General::IpInSubnet($zone_address, $net_address, $net_mask)) {
- return 1;
+ return $zone_address;
}
}
-
- return 0;
}