5.5. Firewall Types
Although most firewalls implement the functions described earlier, the actual implementation or firewall type is spread across four areas:
Embedded
Software
Hardware
Application
5.5.1.
5.5.1.1. Embedded Firewalls
When firewall functions are integrated into a router or a switch, the firewall is said to be embedded. Also known as choke-point firewalls, embedded firewalls usually perform only stateless inspection of packets at the IP level, resulting in faster performance but an increased vulnerability to hostile code.
5.5.1.2. Software Firewalls
Software firewalls themselves come in two different types—enterprise class for performing routing functions for large networks, and a SOHO (Small Office, Home Office) class. Usually ...
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