Doktornotor, yes, I'm using my snort as you said it, in in-line mode, like the bridge between two network segments (between my ISP router and my main firewall). Now, would you tell me if this way, setting my wan ip on passlists, would not open some security hole in my network? I think it might not block some kind of threat, I do not know. If you do not see problem I will leave it configured this way, with ip of wan added in the passlist.