Hello .. As far as I know iptables use MAC Address information for filtering. It cant be used for filtering packets, and I assume iptables cannot edit / modify ARP / RARP stuff. If you find an alternate way, Do Share :) Regards Babar Kazmi. ----- Original Message ----- From: "Thomas Preissler" <tomjohn@xxxxxx> To: "netfilter-user Mailinglist" <netfilter@xxxxxxxxxxxxxxxxxxx> Sent: Sunday, November 30, 2003 3:12 PM Subject: How to make a computer invisible > Hello folks, > > how do I really make a computer totally invisibly as it would be > when it does not exist? > > It is clear, that the simplest solution is to DROP all incoming > packets, but what's about (R)ARP packets? Can they be blocked anyway? >