I want to open a reverse tunnel in background. When using OpenSSH
ssh -NfR 9022:127.0.0.1:22 <target> always worked. When I did that with dropbear on my router, it failed like this:
# ssh -NfR 9022:127.0.0.1:22 <target> ssh: Exited: Error resolving '9022:localhost:22' port '22'. Name or service not known
ssh -R works fine, but doesn't start in background. Leaving either 'f' or 'R' didn't help; it printed the same error. Replacing the
localhost didn't help either.
Please, SF, help me! :)