A.P. Lawrence

This article is from a FAQ concerning SCO operating systems. While some of the information may be applicable to any OS, or any Unix or Linux OS, it may be specific to SCO Xenix, Open Desktop or Openserver.

There is lots of Linux, Mac OS X and general Unix info elsewhere on this site: Search this site is the best way to find anything.

TCP/IP and NFS FAQ

How can I restrict who can login with ssh?

We often have systems that have run for years with no connection to the outside world, and now suddenly an Internet connection is added and ssh access is set up. Unfortunately, many users have weak or even blank passwords.

If only some users need to use ssh, it's best to set up new users with strong passwords and restrict ssh to only those users.

You do this by adding a line like this to /etc/ssh/sshd_config

 AllowUsers      doug essex 

 

Restart sshd after making this change (you can even do that if you are currently logged in over ssh). Only those users will be allowd ssh access.

Dave DiPietro noted: SCO versions may put the sshd configuration file at /usr/local/etc/sshd_config.

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