No Route To Host

We are testing ZeroTier and we are liking it, however there are two cases of the 10/10 that we added for testing that are not working. It was successfully added to the network but we cannot ping the host nor can it ping the other hosts.

These are Linux servers and there is no Firewall in the operating system.

I need help to know what is happening in these two case

I think the developers need much more details to answer that.

  • What client version(s)?
  • Where those two added clients properly authorized to join the network on the admin side?
  • Only Ping is not working or other ports/services are also blocked?
  • Same IP addr? IPv4 or 6? DHCP?
  • Maybe the ISP / local LAN is using the same subnet? (Try different ones! 172… or 100.x.y.z)