my $CHAIN_NAT_DESTINATION = "NAT_DESTINATION";
my $CHAIN_MANGLE_NAT_DESTINATION_FIX = "NAT_DESTINATION";
my @VALID_CHAINS = ($CHAIN_INPUT, $CHAIN_FORWARD, $CHAIN_OUTPUT);
+my @ANY_ADDRESSES = ("0.0.0.0/0.0.0.0", "0.0.0.0/0", "0/0");
my @PROTOCOLS = ("tcp", "udp", "icmp", "igmp", "ah", "esp", "gre", "ipv6", "ipip");
my @PROTOCOLS_WITH_PORTS = ("tcp", "udp");
# Skip invalid rules.
next if (!$source || !$destination || ($destination eq "none"));
+ # Sanitize source.
+ if ($source ~~ @ANY_ADDRESSES) {
+ $source = "";
+ }
+
+ # Sanitize destination.
+ if ($destination ~~ @ANY_ADDRESSES) {
+ $destination = "";
+ }
+
# Array with iptables arguments.
my @options = ();
my @source_options = ();
if ($source =~ /mac/) {
push(@source_options, $source);
- } else {
+ } elsif ($source) {
push(@source_options, ("-s", $source));
}
# Prepare destination options.
- my @destination_options = ("-d", $destination);
+ my @destination_options = ();
+ if ($destination) {
+ push(@destination_options, ("-d", $destination));
+ }
# Add time constraint options.
push(@options, @time_options);