I was downloading a torrent with utorrent and my firewall blocked a connection thought my own internal IP (10.1.1.5) to 127.0.0.1 in the application alg.exe, since it's was a connection to my machine I allowed but just after that another alert appeared, an external IP trying to connect to alg.exe, was it an invasion or what is related to alg.exe ?

Edited January 19, 200917 yr by shizuko

alg.exe is the Application Layer Gateway Service. You would see that if an app was trying to make a request via a hook into the firewall (which most torrent clients do install). It's likely your bittorrent client was trying to bypass the firewall via an alg plugin.

I see, thank you for the information, I have never seen this happen before so I wondered...

np - always better to be safe than sorry