An incident on a component used by the SSH gateway occurred at 08:56 UTC.
This issue has been fixed at 09:12 UTC.
From 08:56 UTC to 09:12 UTC, all clever ssh commands would hang forever.
Since 09:12 UTC, you may get the message "Opening an ssh shell." and then nothing. If this does happen, you will have to restart the application you are trying to ssh to.