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[GH-ISSUE #1852] UDP is bugged with Traefik 3.6 #6823
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Originally created by @standadHD on GitHub (Nov 12, 2025).
Original GitHub issue: https://github.com/fosrl/pangolin/issues/1852
Describe the Bug
Just for your information, if you ran in the same problem like me.
I updated the whole pangolin stack to the newest versions including Traefik.
After that, all my UDP forwards didnt work anymore.
As you can see here: https://github.com/traefik/traefik/issues/12251
it seems like a bug.
So if you update pangalon, dont update Traefik to 3.6 if you want to use UDP forwarding!
Took me several hours to find this issue
Environment
none
To Reproduce
Upgrade Traefik to 3.6
Expected Behavior
.
@Lokowitz commented on GitHub (Nov 14, 2025):
This is fixed in 3.6.1 https://github.com/traefik/traefik/pull/12267
@oschwartz10612 commented on GitHub (Nov 14, 2025):
Thanks @Lokowitz