Step 1:
Access your Linksys router’s web-based setup page through Cisco Connect.  For instructions,click http://kb.linksys.com/Linksys/ukp.aspx?pid=80&vw=1&articleid=21445" rel="nofollow - here .

NOTE:  To launch Cisco Connect on a Mac® computer, navigate to the Applications folder in Go, and then start Cisco Connect.  For detailed instructions, click http://kb.linksys.com/Linksys/ukp.aspx?pid=80&vw=1&articleid=21465" rel="nofollow - here .

Step 2:
Click on the Applications & Gaming tab.

Step 3:
On the Single Port Forwarding sub-tab, fill out the appropriate fields with the correct entries.  In this example, we'll be forwarding ports based on the following information:

Static IP Address set on Xbox 360®:  192.168.0.15
Default Xbox LIVE® ports:

Port:  80, Protocol: TCP
Port:  88, Protocol: UDP
Port:  53, Protocol: both (TCP & UDP)
Port:  3074, Protocol: both (TCP & UDP)

NOTE:  For assistance on setting up a Static IP on your Xbox 360®, contact Xbox® support.

Step 4:
Under Application Name, enter “xboxlive” for each of the lines that you’ll be working on.  You may enter a different name if you like. 

NOTE:  In this example, a total of four (4) xboxlive lines are entered.

Step 5:
Complete the rest of the entries for each field.  Start by entering each unique port number inside the allocated fields under the External Port column.  Proceed by repeating the same port numbers under the Internal Port column.

NOTE:  An error message, shown below, will prompt you if the port numbers you entered are out of range.  Make sure that the port numbers you enter are within the range of 0 – 65535.

Step 6:
Under the Protocol column, be sure to select the correct protocol for each line.

Step 7:
Under the To IP Address column, complete the empty field by enter IP address of your Xbox 360®.  In this example, 192.168.0.15 is the IP address of the Xbox 360®.  Therefore, 15 is the value we need to enter for each line.

NOTE:  If your Xbox® has a different IP address assigned, enter that IP address instead.

Step 8:
Under the Enabled column, make sure that each box is checked.

After completing the steps shown above, you should now have a screen similar to the screenshot below:

NOTE:  Adding of ports to be forwarded is only limited to the space allotted on the page.

Step 9:
After completing all the necessary entries, click .

Step 10:
Once your changes have been saved, a confirmation screen should appear.  Click on the Continue button to return to the previous page.