Constant UDP traffic without any transfers running

[solefald]

Hey guys, hoping someone would be able to help me here...

Running a PPC build of 2.33 (same issue with 2.31 and 2.32) on a Synology DS410 NAS.

Last night I noticed that traffic on my firewall was at constant 40-50kbps (320-400KBps), which was very odd.
After some poking around it turned out to be various UDP traffic to/from my Transmission port (i'm running on default port 51413).
I find it very strange, since I did not have any transfers running and no torrents loaded into Transmission at all.
I've never noticed this before, but is it normal? That's alot of traffic for no apparent reason....

I only had 51413/tcp forwarded to Transmission, but it looks like UPnP on my router (DD-WRT) added forwarding for 51413/udp by itself.


What can I do to prevent this traffic when torrents are not running? Change the peer-port? Disable UPnP? Something else?

Thank you!

[lazybones]

Turn off DHT it is always running.

[solefald]

Turn off DHT it is always running.

Thank you!

Do you have any idea why this is happening? I have not downloaded anything in at least 2 or 3 days. Why is my IP is still listed in DHT? Does it not expire after a while?

[lazybones]

Turn off DHT it is always running.

Thank you!

Do you have any idea why this is happening? I have not downloaded anything in at least 2 or 3 days. Why is my IP is still listed in DHT? Does it not expire after a while?

DHT is tracker-less, you need to stay connected to a few peers for it to work, Transmission keeps this running as long as it is running so that when you open a magnet link it can get searching right away.. Also it will look for additional peers when you open a normal torrent.

If transmission waited to connect DHT only when you opened a torrent you would probably find that some torrents performed very poorly for several min while it tried to connect.