After I installed Agnitum Outpost Firewall 4.0 on my PC, I've been running it without much trouble for quite a while. Until last night, when I tried to view on-line video via PPStream (a China-based P2P video content provider), Outpost blocked my access, reporting something like TCP/IP attacks. I had put the application "PPStream" to Outpost's "always trusted applications" and switched the working mode to "allow most communications", but the problem persisted. As long as Outpost kept working, I could not view the on-line video. Strange enough is that my Emule works fine with Outpost. Finally I had no choice but to uninstall Outpost. After that, my PPStream worked fine again. Since I've used ZoneAlarm Professional 5.5 and never met this embarrassing problems with P2P software before, I doubt if there if anything wrong with the Outpost firewall. Though I will use the ESET Smart Security Suite whenever its beta version becomes available on April 2, I'd be looking forward to any comments or suggestions regarding the malfunction of Outpost firewall. Thanks for your time.