Reference Manual for the ADSL Modem Wireless Router DG834G
Protecting Your Network 5-11
v1.3, March 2007
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 have created in the Schedule menu. You can also have the
modem router log any attempt to use Instant Messenger during that blocked period.
The parameters are:
• 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 feature to add any additional services or applications that do not already
appear; see “How to Define Services” on page 5-13 for details.
• Action—Choose how you want this type of traffic to be handled. You can block or allow
always, or you can choose to block or allow according to the schedule you have defined in the
Schedule menu.
• LAN Users—These settings determine which packets are covered by the rule, based on their
source LAN IP address. Select the desired option:
– Any — all IP addresses are covered by this rule.
– Address range — if this option is selected, you must enter the Start and Finish fields.
– Single address — enter the required address in the Start field.
Figure 5-7
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