I can do a successful back and restore to a local machine that uses port 22 without using hostname:22. If I use hostname:22 if fails in the same way as using hostname:1976 to my remote server?
Something is wrong with the documentation?
It recognizes ":22" as "-P 22" but then the server refuses to respond.
Try using hostname:22 to the server you backup to and let me know if it works?