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April 18, 2011
Report Finds Fault With Common Network Firewalls
By Doug Caverly
People responsible for selecting and maintaining network firewalls might want to revisit their choices sometime soon. New information from NSS Labs indicates that five out of six mainstream firewall options failed to keep out hackers when subjected to an attack called the TCP Split Handshake spoof.

To address one obvious point up front: not everyone agrees that a problem exists. Various companies have either said they've been unable to reproduce NSS Labs's results, or that they protect users against the TCP Split Handshake spoof in a different way.

Fortinet argued, for example, "FortiGate platforms are not susceptible to split handshake attacks when AV and IPS engines are enabled. Approximately 85% of our customers implement our product using multiple security components within one appliance. Not only does this test support the fact that traditional stand-alone firewalls are ineffective, it also supports the need to aggregate multiple security functions in an easy to use, low TCO product to provide the best protection."

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