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Date:      Mon, 08 Aug 2005 00:32:37 +0200
From:      Benjamin Lutz <benlutz@datacomm.ch>
To:        questions@freebsd.org
Subject:   Re: telnet/sshd limited by user?
Message-ID:  <42F68C05.1000404@datacomm.ch>
In-Reply-To: <20050806221350.C2146@fw.skeleton.org>
References:  <20050806221350.C2146@fw.skeleton.org>

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>
>     Is it possible to set things so that 'telnet' is allowed only to one
> specific user, while everyone else needs sshd? ie: Obviously, nologin
> can be used as a shell to not permit any logins (but makes 'su' break
> too), but I'd like to allow telnet for one specific user only and keep
> everyone else on sshd.

Yes, by playing with PAM. You can change telnetd's PAM configuration
(/etc/pam.d/telnetd) to include a group check:

auth	requisite	pam_group.so	no_warn group=telnetusers

Then create a group "telnetusers", and make your telnet user a member of it.

Haven't tested it myself, hope it works.

Cheers
Benjamin

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