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From: =?ISO-8859-1?Q?Ren=E9_Berber?= <r DOT berber AT computer DOT org>
Subject:  Re: Limit access via openssh?
Date:  Wed, 14 Nov 2007 15:02:49 -0600
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Tony Benham wrote:

> This isn't strictly a cygwin question, but I'm using cygwin ssh implement=
ation.
> I have an external user that uses ssh & public key to open a tunnel to my
> windows server running cygwin. They use the tunnel to connect to an apache
> server inside our network. This all works fine. What I want to do is to l=
imit
> their access to only the apache server, and prevent them opening terminal=
s on
> our server ?
> Is this possible ?

Yes.  The way to do it is using the options on the authorized_keys file,
see 'man 8 sshd' section 'AUTHORIZED_KEYS FILE FORMAT'.

The format of ~/.ssh/authorized_keys is:

TYPE KEY COMMENT

you use the format with options:

options TYPE KEY COMMENT

where, in your case, options are:

no-pty,no-X11-forwarding,no-agent-forwarding,permitopen=3D"host:port"

(change host:port to the values used by your tunnel).
--=20
Ren=E9 Berber


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