Graeme McKerrell

CLISH itself doesn't provide any transport controls. It is a just command line program. If you wish to log into your box and use CLISH then you will need to set the default shell for your user. This way all the security access controls are handled by the hosting Linux system as for any other shell.

I think you just need to set clish as your login shell use the "chsh" command or edit your /etc/passwd file.