One of the biggest headaches with using a BitTorrent client with a router is port forwarding / lack of open ports / checking for open ports. Opening ports in a torrent client is more about troubleshooting router settings and configuration to get the port forwarding right.
I use a Netgear router with my laptop, hence I will be using it for the steps in this tutorial. However, these should suffice for most routers,
Open port in uTorrent
Find and modify port used
We need to find the port used by torrent client. It is also a good idea to change it to something between 60000 and 65000 – many ISPs are known to throttle ports below that.
In uTorrent, go to Options > Preferences. In the left pane, click Connection. Change the port and note the number down somewhere (to be used in configuration later).
Find network IP
Hit Windows key, type cmd and hit enter. In the command prompt, enter ipconfig and hit enter. Note down the IP address that comes up – this will also be used later.
Enter 192.168.1.1 (without .com at the end or http in front) into the address bar of browser and hit enter. You will be asked for login details – if you haven’t changed it, it will be “admin” and “password” respectively.
You are on your own in adding port forwarding – get the option/menu that says “add a port” with forwarding.
Ensure that you name it with a recognizable word and set it to be open for both TCP and UDP. Also type in the port number noted down in first step and network IP noted down in second step.