root@aliyun-sh:~# tailscale netcheck
Report:
* Time: 2025-06-18T02:21:17.856800322Z
* UDP: false
* IPv4: (no addr found)
* IPv6: no, but OS has support
* MappingVariesByDestIP:
* PortMapping:
* CaptivePortal: false
* Nearest DERP: unknown (no response to latency probes)
root@aliyun-sh:~# ping ^.derps.link
ping: ^.derps.link: Temporary failure in name resolution
