SSH Security

Scot L. Harris webid at
Wed Dec 7 14:53:56 UTC 2005

On Wed, 2005-12-07 at 09:35, STYMA, ROBERT E (ROBERT) wrote:
> > Key based authentication is the right way to go.  You should disable
> > root ssh access completely.  
> > 
> Key based authentication is good, but there is one caveat.  Straight
> key based allows you to log in directly without typing a password.
> If you are ssh'ing from work to home from a UNIX machine, any sys-admin
> with the root password on your work machine can become you and then
> ssh to your home machine as you with no password.  Maybe you don't care
> if your sysadmin is dinking around in your home machine and maybe you do.
> I am not saying not to use key based authentication, but it is not a 
> cure all.  

You are correct, there are no magic bullet solutions.  Typically you
would still use a password/passphrase to use your private key.  Of
course the same rules apply as to any password, use a good non-trivial
one that can not be guessed.

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