Top firewalls easily pierced

Security analyst Steve Gibson has written and is giving away a simple Trojan horse capable of penetrating most major PC firewalls. The program, labeled LeakTest, identifies itself to firewalls by McAfee.com, Symantec, Sygate, and others as a "trusted" application, gaining virtually unrestricted access to a PC's Internet connection. The one major firewall maker that did not fail Gibson's test was ZoneAlarm. Other security companies are in the process of patching their programs.

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