SSH Security

Jeroen van Meeuwen kanarip at
Wed Dec 7 15:21:22 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
> >
> > 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.

You should use a passphrase to use with your private key, unless you're
using SSH between servers on the same subnet (preferably without third-party
network components) and the boxes use the same passwords.

Kind regards,

Jeroen van Meeuwen


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