ZeroTier kills LAN connections

[myron]

Something that I can’t find a solution to. Fresh installation of ZeroTier on a Raspberry Pi. Ufw is installed and configured to allow 9993/UDP through the Pi’s firewall in both directions from any IPv4 and IPv6 address.

To                         Action      From
--                         ------      ----
Anywhere                   ALLOW       10.0.0.0/8
Anywhere                   ALLOW       172.16.0.0/12
Anywhere                   ALLOW       192.168.0.0/16
22/tcp                     LIMIT       Anywhere
4500/udp                   ALLOW       Anywhere
500/udp                    ALLOW       Anywhere
443                        LIMIT       Anywhere
Anywhere                   ALLOW       9993/udp
9993/udp                   ALLOW       Anywhere
22/tcp (v6)                LIMIT       Anywhere (v6)
4500/udp (v6)              ALLOW       Anywhere (v6)
500/udp (v6)               ALLOW       Anywhere (v6)
443 (v6)                   LIMIT       Anywhere (v6)
Anywhere (v6)              ALLOW       9993/udp (v6)
9993/udp (v6)              ALLOW       Anywhere (v6)

Same symptoms even if the Firewall rules for port 9993 are there or not.

UPnP settings are correctly sent to the router and the router is accepting the port forwarding settings.

No IP conflicts exist. ZeroTier service is loaded and operational.

Now… The problem is . . . . .

When I join my ZT private network, apart from pings, all communications in the local area network to the RasPi is killed. To get LAN comms back I need to sign in on the console and leave my private ZT network.

What additional information is required to be able to diagnose the fault?

[zt-travis]

Hello,
it might have something to do with the zerotier managed routes. Is the pi on the same physical lan as one of them? One quick hack/trick is to make the zerotier managed route a /23 instead of /24.