no outgoing connections

[Hugo]

It appears like utorrent can only accept incoming connections to peers on my machine, not connect actively to other peers.

my current stats:

Last launched: 20.06.2010 14:11:17

# incoming conns since start: 1333708

# outgoing conns since start: 0

# handshake: 908750

# connections: 106

# half-open: 1 (0 connections)

Even when running torrents from public trackers with thousands of peers and seeds, my bandwidth may be maxed out but all connections are still incoming only.

I am behind a router; if I disable upnp port mapping to prevent incoming connections, no new connections are initiated at all, and all torrents stall.

This happens without a resident virusscanner or firewall active except the default windows firewall.

There is no proxy server configured in utorrent, and I am quite certain that my ISP does not run a transparent proxy or firewall service, or interferes with torrents in any other way. At least I could find no mention of it on the web, and it is one of the largest ISP in my country.

It is not too big a problem, since apparently all torrents still download and seed at full speed.

But I am curious, any idea what could cause this?

[Switeck]

Only incoming connections but no outgoing?

Crazy!

Can you try with a brand new install of uTorrent using portable install method (so as not to "damage" your current setup)?

There's a few settings in uTorrent that might cause these problems but won't be set that way if you used new/default settings.

[Hugo]

After first tests it seems that the portable install of utorrent does not have this problem; it allows outgoing connections.

UPDATE:

I think I found the problem.

bt.trans_disposition was set to 255, and I was using utorrent 1.8.1

As far as I now understand this is not a valid value for this version. Setting it to 0 or 1 solves the problem. Migrating to the newest utorrent is planned in the near future.

As for why it was set that way, I remember changing it way back when utp came out, it seems like I followed the wrong guide.

Sorry for the trouble and thanks for your help!

[Switeck]

v1.8.3 and later changed what different bt.trans_disposition values do.

v1.8.1 is hopelessly out of date, we don't support or troubleshoot problems with it anymore.