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Date:      Fri, 14 Jan 2000 13:32:22 -0500
From:      Nathan Dorfman <nathan@rtfm.net>
To:        cjclark@home.com
Cc:        Nicholas Brawn <ncb@zip.com.au>, freebsd-security@FreeBSD.ORG
Subject:   Re: Disallow remote login by regular user.
Message-ID:  <20000114133222.A18079@rtfm.net>
In-Reply-To: <200001140145.UAA15101@cc942873-a.ewndsr1.nj.home.com>; from Crist J. Clark on Thu, Jan 13, 2000 at 08:45:20PM -0500
References:  <Pine.LNX.4.10.10001141203280.3124-100000@zipperii.zip.com.au> <200001140145.UAA15101@cc942873-a.ewndsr1.nj.home.com>

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On Thu, Jan 13, 2000 at 08:45:20PM -0500, Crist J. Clark wrote:
> Nicholas Brawn wrote,
> > Hi folks. I'm trying to ocnfigure my system so that I can disallow a
> > particular user account from being able to login remotely, and forcing
> > users to su to the account instead. How may I configure this?
> > 
> > PS. Users may be using anything from telnet to ssh to login to the system,
> > so I need something that works across the board.
> 
> For anything that is going to call login(1), you can use
> /etc/login.access(5). That pretty much eliminates stuff like telnet,
> rlogin, and console logins. For SSH, look at the 'AllowUsers' and
> 'DenyUsers' keywords for the sshd_conf file on the sshd(8)
> manpage. And of course, if ftp(1) is an issue, there is /etc/ftpusers
> as described in ftpd(8).

You can make sshd use login(1). Set UseLogin to yes in sshd_config. This
is (at least sounds like) a good idea just so that login.access(5) and
login.conf(5) have their effect.

> None of these options, however, should mess with su(1).
> -- 
> Crist J. Clark                           cjclark@home.com

-- 
Nathan Dorfman <nathan@rtfm.net>         The statements and opinions in my
Unix Admin @ Frontline Communications    public posts are mine, not FCC's.
"The light at the end of the tunnel is the headlight of an approaching
train." --/usr/games/fortune


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