Error connecting to the ZeroTier service: timed out，Please check that the service is running and that TCP port 9993 can be contacted via 127.0.0.1.

还有一种情况：

ZEROTIER_CENTRAL=http://127.0.0.1:9993 zerotier-cli listnetworks
Error connecting to the ZeroTier service: timed out

Please check that the service is running and that TCP port 9993 can be contacted via 127.0.0.1.

关了selinux，也不行，journalctl -u zerotier-one -f 实时只能看到如下：

-- Logs begin at 六 2026-07-25 09:00:30 CST. --
8月 17 16:31:09 localhost.localdomain systemd[1]: Started ZeroTier One.
8月 17 16:31:09 localhost.localdomain zerotier-one[13071]: Starting Control Plane...
8月 17 16:31:09 localhost.localdomain zerotier-one[13071]: Starting V6 Control Plane...

没有什么意义，最终解决：

[root@localhost ~]# ZEROTIER_CENTRAL=http://127.0.0.1:9993 zerotier-cli listnetworks
Error connecting to the ZeroTier service: timed out

Please check that the service is running and that TCP port 9993 can be contacted via 127.0.0.1.
[root@localhost ~]# systemctl stop zerotier-one
[root@localhost ~]# cp -r /var/lib/zerotier-one/networks.d /var/lib/zerotier-one/networks.d.bak
[root@localhost ~]# rm -f /var/lib/zerotier-one/networks.d/*
[root@localhost ~]# systemctl start zerotier-one
[root@localhost ~]# zerotier-cli listnetworks
200 listnetworks <nwid> <name> <mac> <status> <type> <dev> <ZT assigned ips>
[root@localhost ~]# zerotier-cli join 你的网络ID
200 join OK

删除所有网络后，重新加入即可。