From f98bb538e59279bb0768a15fc7d95267f4d61c74 Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Fri, 21 Mar 2014 13:33:08 +0100
Subject: [PATCH 1/1] firewall: rules.pl: Catch invalid configurations.

---
 config/firewall/rules.pl | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/config/firewall/rules.pl b/config/firewall/rules.pl
index d9c9b5cc0..a131c54a8 100755
--- a/config/firewall/rules.pl
+++ b/config/firewall/rules.pl
@@ -337,6 +337,11 @@ sub buildrules {
 
 							# Use iptables DNAT
 							} else {
+								if ($destination_is_firewall && !$destination) {
+									$destination = &fwlib::get_external_address();
+								}
+								next unless ($destination);
+
 								my ($dnat_address, $dnat_mask) = split("/", $destination);
 								@destination_options = ("-d", $dnat_address);
 
-- 
2.39.2