RE: remote ssh for root

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To: Mark Senior <Mark.Senior@gov.ab.ca>
Date: Mon, 9 May 2005 08:45:31 -0700

I was playing around with that, but I really don't want to limit the
commands that may be run as root from this trusted host. Is there a way to
say ALL commands like there is in sudo?

Thanks,
Dan

                                                                                                                         
              Mark Senior
              <Mark.Senior@gov.ab.ca> To: Daniel Engelsen/PCSHS@PCSHS
                                                  cc: secureshell@securityfocus.com
              05/09/2005 08:32 AM Subject: RE: remote ssh for root
                                                                                                                         
                                                                                                                         

OK, I see what you mean. How about this - don't know if it exactly
meets what you need, but it should get you close:

If you're using the openssh 4 ssh server (and this is likely present in
earlier versions, I haven't checked), set PermitRootLogin to
"forced-commands-only". This allows root login with public key
authentication only, and only when a specific command has been specified
for execution.

Then, make a keypair for root, and put the private key only on the one
trusted admin box (with appropriate. Add to the start of the relevant
line in .ssh/authorized_keys2 file the limitation:
from="trustedhost.my.domain"

Optionally, you can apply other limits to the use of the key you've
created. For example, limit the command(s) that can be run with that
key, by adding
command="/path/to/command"
to the start of the relevant line of root's .ssh/authorized_keys2 file

see the section AUTHORIZED_KEYS FILE FORMAT in the sshd manpage for the
list of possibilities.

Hope that helps
Mark

> -----Original Message-----
> From: daniel.engelsen
> Sent: May 9, 2005 08:51
> To: Mark Senior
> Subject: RE: remote ssh for root
>
>
> I want to have one host that is trusted by the many hosts.
> From this host, I want to be able to perform a remote ssh to
> the many boxes as root; however, I do not want to allow
> direct root login on any of the servers.
> If you want to be root, I want the user to have to su to the root id.
> Also, I do not want to limit what comamnds I can run as root
> on these boxes from this trusted host.
>
> Thanks,
> Dan
>
>
>
> Mark Senior
> To: Daniel Engelsen
> Subject: RE: remote ssh for root
>
>
>
> I'm sorry, could you clarify what you mean exactly? I'm not
> sure what you mean, to ssh as root, without logging in as
> root via ssh.
>
> I suppose just using su or sudo wouldn't cut it?
>
> Thanks
> Mark
>
>
>
> > -----Original Message-----
> > From: daniel.engelsen
> > Sent: May 6, 2005 10:22
> > To: secureshell@securityfocus.com
> > Subject: remote ssh for root
> >
> > I would like to setup a trusted host that utilizes ssh;
> however, I do
> > not want root to be loginable. If I set PermitRootLogin to
> no, then
> > the remote ssh function stops as well. Does anyone know of
> a way to
> > be able to do remote ssh's as root without allowing root to
> be able to
> > login?
> >
> > I am using AIX versions 5.1, 5.2, and 5.3, and we are running ssh
> > versions
> > 3.6 and 3.8.
> >
> > Any ideas would be greatly appreciated.
> >
> > Thanks,
> >
> >
> >
>

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• Previous message: Abraham, Suraj: "Weird results"
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