If security is more important than performance at your site, you should use application-level gateway firewalls. Application-level gateway firewalls include Axent Raptor , Network Associates' Gauntlet , and Secure Computing's Sidewinder , as well as many others. You can find other firewalls with application gateways by visiting the Computer Security Institute's Firewall Search Center . Rik Farrow provides Unix and Internet security consulting and training. He has taught for the IRS, Department of Justice, NSA, US West, Royal Canadian Mounted Police, Swedish Navy, and for many US and European user groups.
Farrow also consults with firms in the design and implementation of security applications.
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