P-792H v2 User’s Guide
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CHAPTER 9
Firewalls
9.1 Overview
This chapter shows you how to enable and configure the P-792H v2 firewall. Use
these screens to enable and configure the firewall that protects your P-792H v2
and network from attacks by hackers on the Internet and control access to it. By
default the firewall:
• allows traffic that originates from your LAN computers to go to all other
networks.
• blocks traffic that originates on other networks from going to the LAN.
The following figure illustrates the default firewall action. User A can initiate an IM
(Instant Messaging) session from the LAN to the WAN (1). Return traffic for this
session is also allowed (2). However other traffic initiated from the WAN is blocked
(3 and 4).
Figure 49 Default Firewall Action
9.1.1 What You Can Do in the Firewall Screens
•Use the General screen (Section 9.2 on page 122) to enable firewall and/or
triangle route on the P-792H v2, and set the default action that the firewall
takes on packets that do not match any of the firewall rules.
•Use the Rules screen (Section 9.3 on page 124) to view the configured firewall
rules and add, edit or remove a firewall rule.
WAN
LAN
3
4
1
2
A
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