Bittorrent Question

[firefly2442 0]

So I was trying to get bittorrent to work again today to no avail. I tried using various ports and even tried using a port scanner to try to find out what ports are open. Kazaa works using port 3681 on my roomates computer, so is there any way that I could use that one? Any thoughts? Thanks.

Edited February 25, 2004 by firefly2442

[Dannik 43]

By default, BitTorrent listens to port(s) 6881-6999. You only need one of these ports open (starting at the lowest) per file you are sharing. This has no bearing on your client's outgoing requests (i.e. downloading) as the tracker defines the ports it distributes on.

Trackers require port 6969 (by default) to connect to clients.

To change the default ports used for listen connections, from a good BT FAQ:

1. Go to Folder Options in the Control Panel.

2. Select the File Types tab at the top of the dialog.

3. Wait a moment for Windows to load the list, then scroll down and select the TORRENT extension. Tip: press the 't' key to jump to entries starting with t. Note: The file extension column might be truncated to just TORR...

4. Click the Advanced button.

5. In the list of Actions, select open, probably at the top of the list, then click the Edit button.

6. The contents of Application used to perform action is the command line. By default it should be:

"C:\Program Files\BitTorrent\btdownloadgui.exe" --responsefile "%1"

Note the double-quotes around %1, and your Program Files directory might be different. To add more command line parameters, simply change this string. For example, to change the port range, you might use:

"C:\Program Files\BitTorrent\btdownloadgui.exe" --minport 10000 --maxport 10100 --responsefile "%1"

7. Finish by clicking OK to close all the dialogs.

All ports listed are both UDP and TCP.

[firefly2442 0]

I'm using Azureus (cool software) http://azureus.sourceforge.net/ so I can change the port right there. I guess my question is, how do I find an open port?

[Dannik 43]

Well, you could use TCPView to see what TCP/UDP ports your system is already accessing, and go from there, or you could port scan your firewall using nmap (although be cautious, as most sysadmins will not exactly appreciate a heavy handed nmap scan).

The thing is, the trackers specify required ports at their end, so you might find that no matter how you reconfigure your client, it may simply not work.

[firefly2442 0]

Thanks for the tips on the tools. I'm giving em a shot and trying various ports.