Packet filtering vs firewall, Packet filtering, 3 packet filtering vs firewall – ZyXEL Communications Broadband Security Gateway P-312 User Manual

Page 166: 1 packet filtering

P312 Broadband Security Gateway

14-6

Introducing the Prestige Firewall

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.