Hi, I do not know if I understand correctly. You want the IPv6 traffic across the bridge transparently. But whether a control standard for IPv4 - is it? To control what crosses the bridge or not you should use ebtables (in broute chain). I believe it is something like: ebtables -t broute -A BROUTING -p ipv4 -j DROP This prevents the processing of the * bridge * for IPv4 packets, but you can still use iptables to filter * routing *. I hope it's this and that works. Thanks. -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html