I think it's late and I've got to be missing something here. I have 2 interfaces to different ISP's. The second interface, eth1, responds just fine on the primary IP ".189". I have an alias interface .188 that when I apply an iptables rule to, gets no traffic at all. Yet if I try and apply rules to .189 it works great. The rule I'm applying to .188 is right after flushing the tables, before any other rules, so it should be catching it (right now just a logging rule). Any clues to what I'm missing? Thanks, Dan