44 | Chapter 3: Protecting Your Network
N300 Wireless Gigabit ADSL2+ Modem Router DGN3500 User Manual
- Address range. If this option is selected, you must fill in the Start and Finish fields.
- Single a
ddress. Enter the required address in the Start field.
• Log. Y
ou can select whether the traffic will be logged. The choices are:
- Never. No log ent
ries will be made for this service.
- Always. Any
traffic for this service type will be logged.
- Matc
h. Traffic of this type that matches the settings and action will be logged.
- Not match. T
raffic of this type that does not match the settings and action will be
logged.
Order of Precedence for Rules
As you define new rules, they are added to the tables in the Firewall Rules screen, as shown
in the following figure:
Figure 21.
For any traffic attempting to pass through the firewall, the packet information is subjected to
the rules in the order shown in the Rules table, beginning at the top and proceeding to the
default rules at the bottom. In some cases, the order of precedence of two or more rules
might be important in determining the disposition of a packet. The Move button allows you to
relocate a defined rule to a new position in the table.
The Firewall Rules screen also lets you open or close AOL or MSN Instant Messenger ports:
1. Under Inst
ant Messaging (IM) Ports, select a radio button:
• Close
IM Ports. Specifies to disable instant messaging traffic.
• Open IM Port
s. Specifies to enable instant messaging traffic. IM ports are open by
default.
2. Click Apply to
save your changes.
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