The firewall, which has served as the sentry between the outside world of the Internet and the internal agency network, may be moving inside the network perimeter to World Wide Web servers, PCs, modems and silicon chips. Such internal firewalls . . .
The firewall, which has served as the sentry between the outside world of the Internet and the internal agency network, may be moving inside the network perimeter to World Wide Web servers, PCs, modems and silicon chips. Such internal firewalls -- known as distributed firewalls -- are the next line of defense against hackers who breach traditional firewalls by exploiting open ports and e-mail servers.

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