Great! Thanks suzschr.
Do you have Cisco Connect Software installed on your main computer? You may open it. Go to Valet Settings and click Advanced Settings, click OK and you will be routed to the router page.
Once on the page, click Applications & Gaming, select Port Range Forwarding and enter the ports you need to open.
It would require you an IP address, you can check the IP address of your DirectTV under the DHCP Client Table. Go to Status, click Local Network and select DHCP Client Table.
Another box will pop-up, look for your DirectTV's IP address on that table.
If you do not have Cisco Connect Software installed, you can still access the router page by typing 192.168.1.1 in the address bar of your browser.