+1, not necessarily related; upgraded to intel clear linux 35400 (confirmed up to 35440), something broke. zerotier-one core dumps; strace last line (partiallly masked) says
Ouch, the plot thickens. Modulo the segfault, and sticking to your tidy checklist, as soon as the node joins my private network, the problem appears (went back up to v. 1.6.6, unsuccesfully, I couldn’t find any clue in my OS updated version).
abfd31bd47 is a network controller, so all of the ZeroTier necessary infrastructure stuff is being connected to.
It looks like 4bc88b0bfd was deleted from the network, so it won’t be working.
From looking around on your network, it all looks pretty normal and working as far as we can tell from here.
I only mention selinux because it came up in some quick searches about fedora 35. I don’t know much about it other than I need to disable to get the computer to work
It appears like your node can’t talk your other nodes from it’s os firewall or it’s router’s nat/firewall.