Help on forwarding ports!!!

Hey guys,

So im trying to forward some ports for my utorrent app. Im using a FRITZ!Box For WLAN 7390 router. In the router page, I have the option to forward ports. The only options it gives me, are:

HTTP server
FTP server
eMule TCP
eMule UDP
MS Remote Desktop
Other applications
Exposed Host

The thing is, I dont know which one the torrents use.

IMPORTANT! In the router page, i also have this box I can check, which says:
Allow changes to security settings over UPnP
Programs that support UPnP can be used to change security settings automatically, such as the FRITZ!Box port forwarding rules. For reasons of security, only enable this option if you really want to allow incoming connections from the Internet.

Is this safe? Im not the only one using the internet and the same router. Is this ok?

Thanks for the help guys!!

I am also using a wifi repeater

All right, cheers mate!! Thats right, when i close utorrent, the ports get closed too. Thanks for clearing that up