Hi Just a general security question regarding the ESTABLISHED,RELATED match. So far I've been letting all est/rel packets in with no further testing. What I'm wondering now is this : Is is possible that a service that you connect to sends malicious packets back to me which my firewall wouldn't detect cause it'd see it as established/related ? I guess what I'm trying to ask is : should I test all packets for unclean etc. even the established ones or am I just too paranoid ?
Thanks Alex
