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UDP trackers time out


Coren42

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I cannot connect to udp:// trackers in uTorrent. I have Windows Firewall (Win7) configured using uTorrent's automatically added rules, and my router is letting through traffic on the correct port, for both TCP and UDP.

The setup guide only shows green checkmarks.

Below is a typical tracker list:

Name Status Update In Seeds Peers Downloaded

[DHT] announcing... 0 18 0

[Local Peer Discovery] working 0 6 0

[Peer Exchange] working 787 4621 0

http://tracker.hexagon.cc:2710/announce Failure: Requested download is not authorized for use with this tracker. 11m 46s 0 0 0

http://tracker.istole.it/announce working 20m 55s 636 4281 10

http://tracker.publicbt.com/announce working 24m 21s 336 2308 10

udp://tracker.istole.it:80/announce Connection timed out. 51m 27s 0 0 0

udp://tracker.openbittorrent.com:80/announce Connection timed out. 51m 29s 0 0 0

udp://tracker.publicbt.com:80/announce Connection timed out. 51m 25s 0 0 0

As you can see, the udp versions of the same trackers that work in http give me "connection timed out" errors. I've never seen any udp tracker work.

Any idea what could cause this issue and what I could do to resolve it?

It's not a big problem, the worst that happens is that I have to add an extra space between upd and http trackers in the tracker list so it doesn't eternally try to connect to the udp trackers. But I'd still like this to work.

Using the latest version of uTorrent, by the way, on Windows 7 x64.

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Why would you want to use both http and udp on the same tracker?

No tracker that I'm aware of will allow a peer to announce twice, it would double the work that needs to be done.

If you want to make sure utorrent is working with udp trackers, find a tracker that you know supports udp and make a torrent with ONLY that tracker using ONLY udp and you'll probably see that it works.

btw, This trend of public torrent authors adding lists of random trackers to torrents is done out of ignorance and/or stupidity. Some people are just gathering names of trackers that have nothing at all to do with the torrent and adding them. All this does is create a list of non-working trackers which sends all the noobs running to support forums wanting to know how to fix the problem. I'm sure the tracker admins find it even more annoying to constantly get hammered with unregistered torrents.

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If you want to make sure utorrent is working with udp trackers, find a tracker that you know supports udp and make a torrent with ONLY that tracker using ONLY udp and you'll probably see that it works.

I have several torrents that have only udp trackers "udp://tracker.publicbt.com:80" is one for example, it never connects. Only connections I get from them is dht, local peer discovery and peer exchange. Udp connections all time out. If I drop in its http equivalent, it connects right up.

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My understanding is the http tracker uses tcp protocol that involves a 3way handshake, where udp is less sophisticated, so I can't imagine any reason for preferring udp over http, but I can tell you that I've seen udp work in utorrent.

I suspect you may have something in your router that is causing the problem, but that's just a guess... but if it's not a lot of work for you to do, try bypassing any routers you use and see if the problem clears.

TuuS

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