relaysrv: unknown response type from server 400

Support
1

Hello everyone,

I noticed that a few days ago, strelaysrv began logging this once an hour:

pool.go:61: https://relays.syncthing.net/endpoint unknown response type from server 400`

This happened after a reboot into a new Linux kernel version (4.16.5 from 4.15.17). What would be the best way to debug this? I tried STTRACE=all and -debug, but got nothing interesting.

Thanks in advance!

2

This means the relaypool failed to connect to your relay. Either the relay is behind a nat or the IP advertised is the wrong one, or you have a firewall blocking incoming connections on the relay port.

3

It turns out that Linux’ HTB was dropping Syncthing’s outgoing packets instead of properly classifying them.

Thanks for your help!

4

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