--- inc/dns.inc.php~	2007-02-09 18:27:52.000000000 +0100
+++ inc/dns.inc.php	2007-02-09 18:28:25.000000000 +0100
@@ -293,7 +293,7 @@
 
 	if(preg_match('!(ip6|in-addr).(arpa|int)$!i', $host))
 	{
-		if(preg_match('!^(([A-Z\d]|[A-Z\d][A-Z\d-]*[A-Z\d])\.)*[A-Z\d]+$!i', $host))
+		if(preg_match('!^(([A-Z\d]|[A-Z\/\d][A-Z\/\d-]*[A-Z\d])\.)*[A-Z\d]+$!i', $host))
 		{
 			return true;
 		}