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Date:      Mon, 11 Mar 1996 08:47:28 +0100 (MET)
From:      Ollivier Robert <roberto@keltia.freenix.fr>
To:        sreid@edmbbs.iceonline.com
Cc:        security@FreeBSD.ORG
Subject:   Re: How secure is FreeBSD 2.1 right after install?
Message-ID:  <199603110747.IAA01731@keltia.freenix.fr>
In-Reply-To: <9603101704.D6300AZ@edmbbs.iceonline.com> from "sreid@edmbbs.iceonline.com" at "Mar 10, 96 05:04:26 pm"

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It seems that sreid@edmbbs.iceonline.com said:
> I've already disabled the r*, finger and telnet services in inetd.conf.
> I don't expect I'll need them. Is there anything else I need to worry
> about?

Put some filters on your Cisco; refuse any internal address coming from the
external interface (IP spoofing), add access  lists for what you don't want
to come from the Internet.
 
> I'm concerned that X might be a potential security hole, since it uses
> TCP port 6000 to accept connections from clients... Can I close off
> remote access to the X server without having to install a firewall? I

Block  all connection  attempts coming to  port 6000-6099  coming  from the
Internet. Use Xauthority-style authentication on the X server.

> won't need to access the X server from the LAN. Can X be set to ignore
> the TCP port?

You'll have to hack the source, that's not really necessary if you block at
the router level. 

-- 
Ollivier ROBERT    -=- The daemon is FREE! -=-    roberto@keltia.frmug.fr.net
   FreeBSD keltia.freenix.fr 2.2-CURRENT #1: Tue Feb 20 01:16:51 MET 1996



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