SSH exit codes
From lxadm | Linux administration tips, tutorials, HOWTOs and articles
ssh from OpenSSH exits with the exit status of the remote command or with 255 if an error occurred.
ssh2 on z/OS uses these exit codes:
0 Operation was successful 1 Generic error, usually because invalid command line options or malformed configuration 2 Connection failed 65 Host not allowed to connect 66 General error in ssh protocol 67 Key exchange failed 68 Reserved 69 MAC error 70 Compression error 71 Service not available 72 Protocol version not supported 73 Host key not verifiable 74 Connection failed 75 Disconnected by application 76 Too many connections 77 Authentication cancelled by user 78 No more authentication methods available 79 Invalid user name