From: Jason Opperisano <opie@817west.com>
To: netfilter@lists.netfilter.org
Subject: Re: dnatting
Date: Wed, 13 Jul 2005 00:48:48 -0400 [thread overview]
Message-ID: <20050713044848.GA22255@bender.817west.com> (raw)
In-Reply-To: <12984bb0050712202131980c46@mail.gmail.com>
On Tue, Jul 12, 2005 at 09:21:43PM -0600, Donald Murray wrote:
> Because the destination server is on the same subnet, users on the inside
> could indeed connect directly to that machine. Alternatively this could be
> handled via DNS.
>
>
> However, if the destination server is inside a DMZ, the firewall needs
> to DNAT in
> PREROUTING and SNAT in POSTROUTING. The DNAT gets traffic to
> the DMZ, the SNAT allows it back. Something like:
no--it doesn't. if by "the destination server is inside a DMZ" you mean
the web server is on a different layer3 subnet than the client, routed
through the firewall. you are applying the half-assed SNAT solution where
it's not even needed. this is worse than the SNAT for the OP's scenario;
at least there the SNAT serves to create some semblance of functionality.
NAT is the duct tape of networking; if you can route, route.
-j
--
"Peter: I'm going to microwave a bagel and have sex with it.
Quagmire: Butter's in the fridge."
--Family Guy
next prev parent reply other threads:[~2005-07-13 4:48 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-11 15:18 dnatting Payal Rathod
2005-07-11 15:20 ` dnatting Jan Engelhardt
2005-07-11 18:21 ` dnatting Payal Rathod
2005-07-11 18:38 ` dnatting /dev/rob0
2005-07-11 18:42 ` dnatting Jan Engelhardt
2005-07-11 15:24 ` dnatting Scott
2005-07-11 18:45 ` dnatting Jason Opperisano
2005-07-11 18:54 ` dnatting Jan Engelhardt
2005-07-13 3:21 ` dnatting Donald Murray
2005-07-13 4:48 ` Jason Opperisano [this message]
2005-07-14 15:42 ` dnatting curby .
2005-07-14 15:49 ` dnatting curby .
-- strict thread matches above, loose matches on Subject: below --
2005-07-11 19:09 dnatting Gary W. Smith
2005-07-12 7:34 ` dnatting Payal Rathod
2005-07-12 11:59 ` dnatting Jason Opperisano
2005-07-12 12:50 ` dnatting Payal Rathod
2005-07-12 21:03 ` dnatting Steven M Campbell
2005-07-12 14:05 dnatting Gary W. Smith
2005-07-12 23:19 dnatting Gary W. Smith
2005-07-13 10:39 ` dnatting Jan Engelhardt
2005-07-13 21:19 ` dnatting R. DuFresne
2005-07-13 14:50 ` dnatting Steven M Campbell
2005-07-13 16:33 ` dnatting Donald Murray
2005-07-13 16:39 ` dnatting Steven M Campbell
2005-07-13 16:28 dnatting Gary W. Smith
2005-07-13 16:40 ` dnatting Steven M Campbell
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