UDP is bugged with Traefik 3.6 #644

New Issue

MrUnknownDE · 2026-04-05T17:30:48+02:00

MrUnknownDE commented

2026-04-05 17:30:48 +02:00

Originally created by @standadHD on 11/12/2025

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

.

*Originally created by @standadHD on 11/12/2025* ### 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 .

MrUnknownDE closed this issue

2026-04-05 17:30:48 +02:00

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Reference: github/pangolin#644