Remote address in SSH DialTCP must be IP address

[tgros...@extrahop.com]

In the crypto/ssh package, the DialTCP function requires that the remote address be presented as a TCPAddr. See https://github.com/golang/crypto/blob/master/ssh/tcpip.go#L324

This means the remote address must be an IP address and port combination, domain names are not possible. The specification (see https://tools.ietf.org/html/rfc4254#section-7.2) states that the remote "host to connect" "may be either a domain name or a numeric IP address".

Why was this decision/limitation made? If I need to use a domain name should I just copy the library and make the changes I need?

[Dave Cheney]

I'm pretty sure you can use the Dial method above, DialTCP was added to avoid using the DNS server at the remote end (I think, it's been years)

[Tony Grosinger]

That worked perfectly, thanks Dave.