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UDP Traffic not being Forwarded #71

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opened 2025-11-19 07:13:13 -06:00 by GiteaMirror · 2 comments
GiteaMirror commented 2025-11-19 07:13:13 -06:00
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Originally created by @tayvermtos on GitHub (Nov 17, 2025).

Describe the Bug

Hi

I have set up a UDP port forwarding rule which forwards port 51870 to a wireguard server inside a network where exposing ports is not an option.
I have had this working successfully with previous versions of NEWT but it seems now to have broken again (unless it's pangolin which doesn't forward the traffic....)
A TCP Dump in the NEWT container only shows control plane chatter but no UDP traffic.
I will test now against an older version of NEWT.

Thanks

Environment

  • OS Type & Version: Ubuntu 22.04
  • Pangolin Version: 1.12.2
  • Gerbil Version: Latest
  • Traefik Version: Latest
  • Newt Version: 1.6.0
  • Olm Version: (if applicable)

To Reproduce

Set up a Wireguard Server and expose the (UDP) port via Pangolin.
From outside you should be able to connect and ping the LAN of the wireguard server (given rules are appropriately configured)

Expected Behavior

From outside you should be able to connect and ping the LAN of the wireguard server (given rules are appropriately configured)

Originally created by @tayvermtos on GitHub (Nov 17, 2025). ### Describe the Bug Hi I have set up a UDP port forwarding rule which forwards port 51870 to a wireguard server inside a network where exposing ports is not an option. I have had this working successfully with previous versions of NEWT but it seems now to have broken again (unless it's pangolin which doesn't forward the traffic....) A TCP Dump in the NEWT container only shows control plane chatter but no UDP traffic. I will test now against an older version of NEWT. Thanks ### Environment - OS Type & Version: Ubuntu 22.04 - Pangolin Version: 1.12.2 - Gerbil Version: Latest - Traefik Version: Latest - Newt Version: 1.6.0 - Olm Version: (if applicable) ### To Reproduce Set up a Wireguard Server and expose the (UDP) port via Pangolin. From outside you should be able to connect and ping the LAN of the wireguard server (given rules are appropriately configured) ### Expected Behavior From outside you should be able to connect and ping the LAN of the wireguard server (given rules are appropriately configured)
GiteaMirror commented 2025-11-19 07:13:14 -06:00
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@Lokowitz commented on GitHub (Nov 17, 2025):

Hi @tayvermtos
do you see some stuff in the log files?
Are you on Traefik v3.6.0? If yes please update to v3.6.1 there was a bug related to UDP https://github.com/fosrl/pangolin/issues/1852#issuecomment-3533211663

@Lokowitz commented on GitHub (Nov 17, 2025): Hi @tayvermtos do you see some stuff in the log files? Are you on Traefik v3.6.0? If yes please update to v3.6.1 there was a bug related to UDP https://github.com/fosrl/pangolin/issues/1852#issuecomment-3533211663
GiteaMirror commented 2025-11-19 07:13:14 -06:00
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@tayvermtos commented on GitHub (Nov 17, 2025):

Bingo!!
@Lokowitz You're a legend!!
I've been trying to work this one out for ages and I could not understand where the issue could be!
I really appreciate Your help on this!
THANK YOU!

@tayvermtos commented on GitHub (Nov 17, 2025): Bingo!! @Lokowitz You're a legend!! I've been trying to work this one out for ages and I could not understand where the issue could be! I really appreciate Your help on this! THANK YOU!
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Reference: github-starred/newt#71
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