Routing to Internet fails after reboot until Zerotier disabled

[MarkLFT]

This morning due to a power failure my router restarted, but after coming up again, I had no Internet access.  We haven't changed anything on the router in a while, so my first thought was an ISP issue.  But they said all ok to the on-prem router.

As a trial I started disabling functions in our router to see if I could isolate the problem.  When I disabled the Zerotier interface, I regained internet access.  So, I did a little more digging, I re-enabled the interface, and the internet still worked.

I then rebooted the router again, from the console this time.  And the same thing happened, no internet access until I disabled the zerotier interface. Once, diabled internet returned, then enabling the zerotier again allowed it to work, and I still had internet access.

Has anyone else experienced this?  Is there a fix or workaround, other than me having to perform these manual tasks each time the router restarts?

[jluo]

I'm experiencing the exact same behavior, on my Proxmox OPNsense VM. Same solution as you mentioned as well. I have not had a chance to poke around and find out exactly how to resolve this problem. I hope someone has some insights.

[random1104]

Saw that in my tests today. It created a gateway even though I marked " This interface does not require an intermediate system to act as a gateway". After the reboot, that gateway is marked as "active" and I get no Internet traffic to the LAN.

Fix for me was to disable the gateways associated with the ZT interfaces.