On Thursday 17 October 2002 11:50 am, Francois Dessart wrote: > Hello, > > Is there an easy way to match RTP/UDP traffic? If you mean RDP / UDP, then it's easy: iptables -A FORWARD -p rdp -s a.b.c.d -d w.x.y.z -j ACCEPT iptables -A FORWARD -p udp -s a.b.c.d -d w.x.y.z -j DROP etc.... If you didn't mean RDP, can you give us a reference to tell us what RTP is ? Antony. -- Normal people think "if it ain't broke, don't fix it". Engineers think "if it ain't broke, it doesn't have enough features yet".