Security
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D6200 WiFi DSL Modem Router
5. To close or open the instant messaging ports, under Instant Messaging (IM) Ports, select the
appropriate radio button:
• Close IM Ports
• Open IM Ports (IM ports are open by default)
6. Click Appl
y.
Add Custom Services to Allow or Block
You can define your own incoming and outgoing custom services to allow or block. To add a
service for blocking, first determine which port number or range of numbers is used by the
application.
To add a custom service:
1. Select ADVANCED > Security > Firewall Rules.
2. Click Add Custom Service.
The Add Services screen allows you to specify or edit your own custom service definition.
You can then use the custom service when creating firewall rules.
3. In the Na
me
field, enter a suitable name for this service.
4. In the Type list, select the correct type for this service (if in doubt, select TCP/UDP):
• TCP
• UDP
• TCP/UDP
5. Enter the starting and ending port numbers. If the application uses a single port number,
enter
that number in both fields.
6. Click Appl
y.
Your information is saved, and you return to th
e previous screen.
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