I’ve spent a good while trying to troubleshoot a machine that I can connect to via ZeroTier fine.
It can be pinged, ssh connects, you can login, type commands etc.
As soon as you use a command that generates a lot of feedback, the connection will drop.
Same for any protocol e.g. loading a web page of a few hundred bytes works fine, anything larger, the connection drops.
Ping would stop working if the payload size was over ~1350 bytes.
Tcpdump on both ends would show packets getting fragmented along the way.
Is ZeroTier incorrectly detecting the mtu of the internet connection?
I was able to make it work by adding these lines to local.conf:
Is there a better solution to this?
If not, hopefully this will help anyone else having the same issue.