hello I recently tested my firewall with Shields UP Port Authority. I should also mention I am runing fedora with iptables. Anyways I am prety much secure it tells me other then one thing wich follows:

Unsolicited Packets: RECEIVED (FAILED) — Your system's personal security countermeasures unwisely attempted to probe us in response to our probes. While some users believe that "tracking down" the source of Internet probes is useful, experience indicates that there is little to gain and potentially much to lose. The wisest course of action is to simulate nonexistence — which your system has failed to do. Your counter-probes immediately reveal your system's presence and location on the Internet.

Now the question I have is how can i iptables to stop counterprobing. There is probably some rule i forgot to add that is allowing it to do so. Any ideas ? Thanks.

Your IPTABLES firewall is probably using the REJECT target. Change it to DROP.

--tarballedtux