Connection errors (Internet domain)

The most common errors that can be returned when a connection fails are:

ETIMEDOUT

After failing to establish a connection during a period of time, the system decided there was no point in retrying any more. The cause for this error is usually that the remote host is down or that problems in the network resulted in transmissions being lost.

ECONNREFUSED

The host refused service for some reason. This error is usually caused by a server process not being present at the requested host.

ENETDOWN

EHOSTDOWN

Status information received by the client host from the underlying communication services indicates the net or the remote host is down.

ENETUNREACH

EHOSTUNREACH

These operational errors can occur either because the network or host is unknown (no route to the host or network is present) or because status information to that effect has been delivered to the client host by the underlying communication services.