P312 Broadband Security Gateway

Figure 14-5 Big Picture - Filtering, Firewall and NAT

14.3 Packet Filtering Vs Firewall

Below are some comparisons between the Prestige’s filtering and firewall functions.

14.3.1 Packet Filtering:

!The router filters packets as they pass through the router’s interface according to the filter rules you designed.

!Packet filtering is a powerful tool, yet can be complex to configure and maintain, especially if you need a chain of rules to filter a service.

!Packet filtering only checks the limited data portion of an IP packet.

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Introducing the Prestige Firewall

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ZyXEL Communications P-312 manual Packet Filtering Vs Firewall