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DG834N RangeMax NEXT Wireless ADSL2+ Modem Router Reference Manual
3-10 Protecting Your Network
v1.0, October 2008
• Type of service being requested (service port number)
Following is an application example of outbound rules.
Outbound Rule Example: Blocking Instant Messenger
If you want to block Instant Messenger usage by employees during working hours, you can create
an outbound rule to block that application from any internal IP address to any external address
according to the schedule that you create in the Schedule screen.You can specify that the modem
router logs any attempt to use Instant Messenger during this blocked period. You can also open or
close Instant Messenger ports: see the Firewall Rules screen in the “Order of Precedence for
Rules” section on page 3-12.
An outbound rule is shown in the Outbound Services screen, which is accessible by clicking on
Add under Outbound Services in the Firewall Rules screen.
This screen allows you to configure the following settings:
• Service. From this list, select the application or service to be allowed or blocked. The list
already displays many common services, but you are not limited to these choices. Use the Add
Custom Service button in the Services screen to add any additional services or applications
that do not already appear. See “How to Define Services” on page 3-13.
Figure 3-7