domains / families / devops / tunnel-doctor

tunnel-doctor

separate

MUST be used first for tunnel / proxy-path connectivity failures or slow throughput (网络故障 / 连不上 / 代理或隧道下超时). Diagnoses Tailscale, proxy, TUN, DNS and SSH-tunnel problems on macOS and Windows/WSL, e.g. Tailscale ping works but SSH fails, curl works but browser gets 503, Git/Docker fails behind the proxy, or downloads crawl despite a reachable proxy. Not for application-layer bugs (use debugging-network-issues).

When to use

• tunnel connectivity failures
• slow throughput
• Tailscale ping works but SSH fails
• curl works but browser gets 503
• Git/Docker fails behind proxy
• downloads crawl despite reachable proxy
• TUN-state failure modes
• SSH access to WSL instances

When not to use

• application-layer bugs
• SSE/CDN/application protocol behavior
• unknown boundary symptoms

Skill page

Source