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STATUS_PORT_UNREACHABLE
The destination port is unreachable
These statuses describe transport endpoint and connection state. For STATUS_PORT_UNREACHABLE, they can appear below higher-level file sharing, DFS, redirector, RPC, or networking code before the error is translated to Win32 or Winsock form.
This is narrower than host unreachable. The host or route may exist, but the requested service endpoint is not reachable at that transport port.
For STATUS_PORT_UNREACHABLE, for diagnostics, capture the endpoint address, address family, connection object, local and remote close/reset events, timeout, route, ICMP condition when available, and the higher-level component that issued the transport request.
What to inspect
- Verify destination port and listener state.
- Check firewall policy and ICMP port-unreachable responses.
- Do not replace this with DNS troubleshooting unless the address was wrong.
References for STATUS_PORT_UNREACHABLE
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