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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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Thu Jan 1 00:00:00 1970:
Thu Jan 1 00:00:00 1970:
Fri Sep 26 09:30:53 2008: Subject: JW
Just what I needed and works great, thanks!
Sun Mar 8 22:22:12 2009: Subject: anonymous
Can I put the list of valid users into an external file, then have sshd_config source that file?
Sun Mar 8 23:33:22 2009: Subject: TonyLawrence
I'm not aware of any version that has inclusion features - it certainly would be a good idea. ALL config files should do that..
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