Chapter 8. Application Proxy Firewalls

Application proxy firewalls are perhaps the most complex firewalls to implement. This complexity is due in large part to the fact that unlike other firewall technologies, application proxy firewalls can make filtering decisions based on the actual application data, which requires that firewall administrators better understand the applications that will traverse the firewall. Practically speaking, two elements comprise an application proxy firewall:

image Application layer filtering

image Proxy server functionality

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