Problem category
Remote Access
Reach your devices from anywhere.
- published
Cloudflare Tunnel Is Connected but the Public Hostname Returns 502: Unable to Reach Origin Service
Confirm the tunnel is connected and the visitor sees the tunnel-specific 502 Unable to reach the origin service, then match the exact cloudflared log signature to a stopped origin, a wrong ingress scheme, a wrong ingress port, or an untrusted origin certificate.
- published
Synology Tailscale Connected but NAS Is Unreachable
Separate tailnet connectivity, name resolution, the tailnet access policy, DSM firewall rules, and the exact Synology service port before changing the NAS.
- published
Synology Tailscale Subnet Router: LAN Device Unreachable
NAS access works, but a LAN service behind it does not. Separate subnet advertisement, CIDR, approval, access policy, client routing and target-side evidence.
- published
Tailscale Connection Stuck on DERP Relay
The connection works, but DERP persists during poor performance. Compare both peers and network observations before requesting a scoped network-owner investigation.
- published
WireGuard Handshake Succeeds but Traffic Does Not Pass
Confirm the handshake is recent, separate a universal WireGuard configuration issue (AllowedIPs and routes) from a platform-specific Ubuntu Server gateway forwarding or NAT issue, then apply a bounded configuration or gateway change with console recovery and rollback.