Quick Reference Guide

ProSafe Dual WAN Gigabit Firewall with SSL & IPsec VPN FVS336G Reference Manual
4-8 Firewall Protection and Content Filtering
v1.0, January 2010
Viewing the Rules
To view the firewall rules: Select Security > Firewall from the menu. The LAN WAN Rules
screen is displayed (Figure 4-1 shows some examples).
Order of Precedence for Rules
As you define new rules, they are added to the tables in the LAN WAN Rules screen as the last
item in the table, as shown in Figure 4-1. For any traffic attempting to pass through the VPN
firewall, the packet information is subjected to the rules in the order shown in the Outbound
Services and Inbound Services rules tables, beginning at the top and proceeding to the bottom,
before applying the default rule. In some cases, the order of precedence of two or more rules may
be important in determining the disposition of a packet. For example, you should place the most
strict rules at the top (those with the most specific services or addresses). The Up and Down
buttons allow you to relocate a defined rule to a new position in the table.
Setting the Default Outbound Policy
The Default Outbound Policy is to allow all traffic to the Internet to pass through. Firewall rules
can then be applied to block specific types of traffic from going out from the LAN to the Internet
(Outbound). The default policy of Allow Always can be changed to block all outbound traffic
which then allows you to enable only specific services to pass through the VPN firewall.
Figure 4-1