Winsock error 10051

WSAENETUNREACH  -  Network is unreachable.

Basic (Microsoft) information for 10051 a.k.a. WSAENETUNREACH

A socket operation was attempted to an unreachable network. This usually means the local software knows no route to reach the remote host.

Detailed (Berkeley) information for winsock 10051, described as "Network is unreachable."

Berkeley description: A socket operation was attempted to an unreachable network.

WinSock description: Almost same as Berkeley. For WinSock, this error is equivalent to Berkeley's EHOSTUNREACH error, the catch-all error for unreachable hosts. "You can't get there from here."

TCP/IP scenario: The local network system could generate this error if there isn't a default route configured. Typically, though, WinSock generates this error when it receives a "host unreachable" ICMP message from a router. The ICMP message means that a router can't forward the IP datagram, possibly because it didn't get a response to the ARP request (which might mean the destination host is down). Note: this error may also result if you are trying to send a multicast packet and the default gateway does not support multicast (check your interface configuration).

User suggestions: Try to ping the destination host, to see if you get the same results (chances are, you will). Check the destination address itself; is it the one you wanted to go to? Check whether you have a router configured in your network system (your WinSock implementation). Do a traceroute to try to determine where the failure occurs along the route between your host and the destination host.

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