I would like to inhibit a dhcp request from a particular mac address, on the dhcp server. If the client is directly LAN connected, I would suppose the following will work :- iptables ....... -m mac --mac-source But to add a twist to the problem, the machine which must be blocked from obtaining a DHCP IP is connected to a DHCP relay, and therefore, the dhcp server is seeing only the mac adddress of the relay. Can this be accomplished with iptables ? Is there a match which works something like this :- iptables ..... -m bootp --mac-source 00:08:a1:ab:75:d1 -j DROP ? Well, if 'iptables' can't serve the purpose, how about ebtables ? Regards. -- 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