I have a few ports in question that are being used in tandem with uTorrent and I’m a little concerned with some of the ports in question. If possible I would like it if you guys could fill me in on what I don’t know.
So here are the ports in question:
[IN]
Source Port
TCP - 50
UDP - 80, 222, 443
[OUT]
Destination Port
TCP - 53, 80
UDP - 25, 53, 80
25 : SMTP - You guys should know what this is
50 : re-mail-ck - Remote Mail Checking Protocol
53 : Gets DNS addresses when not behind a router*
80 : HTTP - Supposedly happens when the search bar is used**
222 : rsh-spx - Why is a port typically used for a remote shell being used with uTorrent?
443 : HTTPS - Again why is uTorrent using this?
*Thing is, I am behind a router so why is that port being fired on my logs?
**Not. I just tested it and I got no such port in my log. So what is it being used for really?
Okay, so some of these ports sound like they are supposed to be. However, I’m behind a router so why is port 53 being used? My test of port 80 with the search bar in uTorrent yielded negative results so what exactly is uTorrent using that port for anyway? And then there is the rest of that mess. Can someone please explain all of these ports for me? They don’t seem to be randomly used ports because those are the only double and triple digit ports I’ve seen in my logs for uTorrent ever. (well actually I saw port 1 as well but I’m not mentioning it because I didn’t document it, sorry, if you have info on that as well that would be great.)