macOS – How to SSH Using a Port Other Than 22 on macOS 10.15.4

catalinamacosssh

I'm trying to ssh to a machine that opens the port 8012 for ssh as opposed to port 22. When I ssh at the command line (ssh -p 8012 username@host), nothing happens. The -vvv option gives no pertinent information other than "trying to connect".

I can do ssh ssh://new@sdf.org (on standard port 22) without problems.

Further, on this Mac I have a VM running Debian. Within this VM I can ssh on the machine with the non-standard port 8012 without problems.

I also have a separate Windows machine where I also have no problems doing what I described.

Edit: output of ssh -vvv ...:

OpenSSH_8.1p1, LibreSSL 2.7.3
debug1: Reading configuration data /Users/[username]/.ssh/config
debug1: /Users/[username]/.ssh/config line 1: Applying options for *
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 47: Applying options for *
debug1: Connecting to [destination] port 8012.

And then it gets stuck there.

Output of cat ~/.ssh/config:

  AddKeysToAgent yes
  UseKeychain yes
  IdentityFile ~/.ssh/id_rsa

Uncommented lines of the output of cat /etc/ssh/ssh_config:

Host *
    SendEnv LANG LC_*

Best Answer

It appears my issue is specifically tied to a recent update of MacOS. The answer was found here: https://mjtsai.com/blog/2020/03/31/macos-10-15-4-broke-ssh/. Specifying the IP address of the server rather than its name resolved my issue.

Related Question