What makes StoneGate firewall so powerful in the web traffic deep packet inspection is that it does not have only a part of the Intrusion Prevention System functionality, but it has the full system fingerprint library in its use, and the same analysis and inspection capability that StoneGate Intrusion Prevention System has. Deep packet inspection also includes anti-virus checking. This combination of detailed protocol analysis and fingerprinting together with full antivirus checking for transferred content provides strong level of security for the web traffic.