Loggin in with Pangolin CLI gives lots of Failed to forward handshake initiation... : write: destination address required errors #499

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MrUnknownDE · 2026-04-05T17:13:09+02:00

MrUnknownDE commented

2026-04-05 17:13:09 +02:00

Originally created by @hcwinsemius on 12/12/2025

Describe the Bug

First, I love pangolin!

Second, I updated today from 1.9.4 to 1.13. I also updated all other dependencies as instructed. Looking at the server logs, once I log in with a machine client with olm, or pangolin CLI, I receive MANY of the messages as below. I have also done a complete install in a separate environment, made one site, made one pangolin CLI login and tested again. I do not see this issue in this case. I have checked and have not seen any BUG report so far that addresses this.

gerbil    | ERROR: YYYY/MM/DD HH:MM:SS Failed to forward handshake initiation: write udp 100.89.128.1:42209->100.89.128.48:51841: write: destination address required

The first IP address is always 100.89.128.1, the second moves around the subnet 100.89.128.0, the last number is changing 24, 36, 40, 48. Port number varies widely.

I can however login to devices, resources, private and public. So from the outside everything seems to work.

Environment

OS Type & Version: (e.g., Ubuntu 22.04): Ubuntu 24.04
Pangolin Version: 1.13.0
Gerbil Version: 1.3.0
Traefik Version: v3.6
Newt Version: 1.7.0
Olm Version: (if applicable) 1.2.0

To Reproduce

make sure there are a bunch of sites and resources, including private resources
Upgrade server from 1.9.4 to 1.13
Login with pangolin CLI
As soon as I login, the ERROR messages start to appear. When I logout, they stop.

Expected Behavior

No ERROR messages in server.

*Originally created by @hcwinsemius on 12/12/2025* ### Describe the Bug First, I love pangolin! Second, I updated today from 1.9.4 to 1.13. I also updated all other dependencies as instructed. Looking at the server logs, once I log in with a machine client with olm, or pangolin CLI, I receive MANY of the messages as below. I have also done a complete install in a separate environment, made one site, made one pangolin CLI login and tested again. I do not see this issue in this case. I have checked and have not seen any BUG report so far that addresses this. ``` gerbil | ERROR: YYYY/MM/DD HH:MM:SS Failed to forward handshake initiation: write udp 100.89.128.1:42209->100.89.128.48:51841: write: destination address required ``` The first IP address is always 100.89.128.1, the second moves around the subnet 100.89.128.0, the last number is changing 24, 36, 40, 48. Port number varies widely. I can however login to devices, resources, private and public. So from the outside everything seems to work. ### Environment - OS Type & Version: (e.g., Ubuntu 22.04): Ubuntu 24.04 - Pangolin Version: 1.13.0 - Gerbil Version: 1.3.0 - Traefik Version: v3.6 - Newt Version: 1.7.0 - Olm Version: (if applicable) 1.2.0 ### To Reproduce - make sure there are a bunch of sites and resources, including private resources - Upgrade server from 1.9.4 to 1.13 - Login with pangolin CLI As soon as I login, the `ERROR` messages start to appear. When I logout, they stop. ### Expected Behavior No `ERROR` messages in server.

MrUnknownDE closed this issue

2026-04-05 17:13:09 +02:00

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Reference: github/pangolin#499

Loggin in with Pangolin CLI gives lots of Failed to forward handshake initiation... : write: destination address required errors #499

Describe the Bug

Environment

To Reproduce

Expected Behavior

Loggin in with Pangolin CLI gives lots of `Failed to forward handshake initiation... : write: destination address required` errors #499