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<p>Your browser doesn't support frames Please upgrade your browser to take advantage of all features of <a href="http://firewall.com/" target="_top">www.firewall.com</a>. </p> <p>Click on the link to proceed to <a href="http://firewall.com/papers/firewalls_ranum.ps.gz" target="_top">Thinking About Firewalls</a> - Ranum, Marcus; Gzip'd Postscript; 30k ``A general overview of firewalls, with tips on how to select one to meet your needs.