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#8 Re: Application level firewalling Posted by debjunkie (62.206.xx.xx) on Tue 14 Jun 2005 at 23:34 I don't know if I did not understand "application level firewalling" correctly before. As far as I know, it means that a firewall can verify the traffic on the application level layer of the OSI-model (Layer 7), to see if, i.e., the traffic to a server and to the destination port 80 is really HTTP and not something else, i.e., a backdoor malware reporting to its master by using port 80, which is allowed on most firewalls. Symantec and Checkpoint Firewalls name this feature "Application Level Gateway". So to me this topic was misleading, and as I don't want to be unkind, I still have to say that I was disappointed, because I thought you would have found some way to do this on a debian-box... Here are some examples I found on the net: BorderWare Firewall Checkpoint Firewall Cisco Secure PIX Firewall & IDS Delegate Proxy Sinus Firewall Watchguard ServerLock

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