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D6200 WiFi DSL Modem Router
5. Click Add Service.
6. In the Service Name field, type a descriptive service name.
7. In the Service User list, select Any (the
default).
This service can be used by any computer on the Internet.
Otherwise, select Single ad
dress, and enter the IP address of one computer to restrict
the service to a particular computer.
8. Select the service type,
either TCP or UDP or both (TCP/UDP).
If you are not sure, select TCP/UDP.
9. In the Triggering Port field, enter the number of the outbound traffic port that causes the
inbo
und ports to open.
10. Enter the
inbound connection port information in the Connection Type, Starting Port, and
Ending Port fields.
11. Click Apply.
The service appears in the Port Triggering Portmap table.
Dynamic DNS
If your Internet service provider (ISP) gave you a permanently assigned IP address, you can
register a domain name and have that name linked with your IP address by public Domain
Name Servers (DNS). However, if your Internet account uses a dynamically assigned IP
address, you do not know in advance what your IP address is, and the address can change
frequently. In this case, you can use a commercial Dynamic DNS service. This type of service
lets you register your domain to their IP address and forwards traffic directed at your domain
to your frequently changing IP address.
If your ISP assigns a private WAN IP address (suc
h as 192.168.x.x or 10.x.x.x), the Dynamic
DNS service does not work because private addresses are not routed on the Internet.