A protocol error occurred. Change of username or service not allowed: (root,ssh-connection)-(zoujiaqing,ssh-connection)

securecrt SSH Client Connection failed:

TheServer has disconnectedWithAn error.  Server message reads:A protocol error occurred.  Change of username or service not allowed: (root,ssh- connection)  (zoujiaqing,ssh-connection)  


This is because the user name in the SECURECRT setting does not match the username you entered when you logged in, and you can change it here:

      user name   , connection    ---dialog options, options

After the modification, the login is OK, which can disable the root login of the server (for security).

A protocol error occurred. Change of username or service not allowed: (root,ssh-connection)-(zoujiaqing,ssh-connection)