The following configuration will allow multiple computers behind the router use BitTorrent.
Step 1: Open your web browser and enter the IP address of your router (192.168.0.1). Enter username (admin) and your password.
Step 2: Click on Advanced and then click Applications.
Step 3: Create a new entry:
•Click Enabled.
•Enter a name (BitTorrent).
•Next to Trigger Port, enter 6881 in the first box and 6999 in the second box.
•Next to Trigger Type, select TCP.
•Next to Public Port, enter 6881-6999.
•Next to Public Type, select TCP.