From: "ryan @ thedataarc" <ryanb@thedataarc.com>
To: netfilter@newkirk.us
Cc: netfilter@lists.netfilter.org
Subject: Re: DMZ Scenario
Date: 14 Nov 2002 20:57:37 -0600 [thread overview]
Message-ID: <1037329062.2827.2.camel@rbhome.inside.thedataarc.com> (raw)
In-Reply-To: <200211142029.57679.netfilter@newkirk.us>
Aha! Thanks so much.
-R Beisner
On Thu, 2002-11-14 at 19:29, Joel Newkirk wrote:
> On Thursday 14 November 2002 07:33 pm, Ryan Beisner wrote:
> > Hi
> >
> > I have successfully installed a mail + web server in my new dmz, filtered
> > by netfilter in Redhat 7.3. My problem is, the request addresses show up
> > as the dmz interface's ip address (of the packet filter box). This
>
> > $ipt -A PREROUTING -t nat -d $PRESext -j DNAT --to $PRESdmz
> > $ipt -A POSTROUTING -t nat -d $PRESdmz -j SNAT --to $PRESext
>
> > $ipt -A PREROUTING -t nat -d $KEYext -j DNAT --to $KEYdmz
> > $ipt -A POSTROUTING -t nat -d $KEYdmz -j SNAT --to $KEYext
>
> Drop the SNAT rules. In the PRE you take anything coming in the 'real' IP and
> change it's destination to the dmz IP. But in the POST you take those same
> packets and change their source to the real IP. If you drop the POST rules,
> then the packets will just pass on to $PRESdmz with their (presumably) real
> source IP intact.
>
> j
>
prev parent reply other threads:[~2002-11-15 2:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-15 0:33 DMZ Scenario Ryan Beisner
2002-11-15 1:29 ` Joel Newkirk
2002-11-15 2:57 ` ryan @ thedataarc [this message]
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