One, it meant I had to break down and rebuild the socket every time it happened, which you started to actually notice after a few torrents. I considered simply incrementing the port number when this happens and trying again which had two problems. Happens about 300 times in 10 seconds on a private tracker in my tests. The odds of this are relatively low on your average public torrent. As soon as you see the same peer on multiple torrents you will start failing to connect (identical source and destination ports between identical hosts, clearly a problem). And it works great.as long as you only are connected to a certain peer on a single torrent. if it's a different socket pair then it does what you want that only applies to the same socket pair If it is busy, but with another state, you will still get an address already in use

This socket option tells the kernel that even if this port is busy (in the TIME_WAIT state), go ahead and reuse it anyway. I know, but how is it technically done, bind() fails if the port is already taken (EADDRINUSE tools -> options -> connections -> advanced network settings -> bind to port so I'd like to know how it's possible to initiate multiple connections from the same port :) Someone from the Azureus channel explained to us how it could be done: After some research it appeared that this is not true. I have spoken with wereHamster on IRC in the Transmission channel and the first conclusion was that it is not possible to initiate more connections from a single port. It is a ideal solution for home QoS filtering without having any effect on the QoS of ISP's, so possible encryption doesn't need to be turned off.

QoS filtering is therefore not really possible, only if one would totally define all traffic except has implemented this and this allowd for a easy QoS rule that filters all traffic coming from the defined port. Though it is possible to set incoming ports, it is not possible yet to define the outgoing port(s). Unfortunately not all trafic is caught with the L7 and IPP2P filters. I am using QoS at home to manage my bittorrent traffic.

Transmission torrent bind