From: Daniel Frederiksen <cyberdoc@cyberdoc.dk>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Ip Src rewite.
Date: Tue, 25 Oct 2005 12:58:04 +0000 [thread overview]
Message-ID: <435E2BDC.1080507@cyberdoc.dk> (raw)
In-Reply-To: <435E26E3.2080204@cyberdoc.dk>
Oscar Mechanic wrote:
> Maybe I have missed somthing and you need to do it in POSTROUTING but
> how about SNAT.
>
Well currently I do not NAT at all. I have ip_forwarding enabled and
have assigned the first IP from the external block on the inside of the
Gateway/Firewall. On the outside of the Gateway/Firewall I have assigned
the WAN IP. This way when a system on the DMZ establishes a connection
it is forwarded through the Gateway.
Any suggestions to changes are appreciated.
/Daniel..
> PS: ip can do stateless nat.
>
> On Tue, 2005-
> 10-25 at 14:36 +0200, Daniel Frederiksen wrote:
>
>>Hello folks..
>>
>>Does any of you know if it is possible to rewrite the ip src in a packet.
>>I have a problem involving a DMZ with external IP addresses routed
>>trough a single WAN IP. When the server initiates a connection, it looks
>>like it comes from the WAN ip instead of it's designated External IP
>>routed through the WAN.
>>So in short, Is it possible to rewrite the packet in the router, with
>>Iptables, to make it look like it comes from the external IP address
>>instead of the WAN IP of the router/firewall.
>>
>>Thank you very much for your time, I appreciate it.
>>
>>/Daniel Frederiksen
>>
>>
>>NB: Small diagram of the setup.
>>
>> DMZ GW/FW ISP/Internet
>>-----------------------------------------------------------------------
>> Server #1 --|
>> e.f.g.h3/26 |
>> |---- Gateway/Firewall --- ISP WAN IP: a.b.c.d/30
>> Server #2 --| a.b.c.d1/30 Ext. IP: e.f.g.h/26
>> e.f.g.h4/26 e.f.g.h1/26
>>----------------------------------------------------------------------
>>
>>_______________________________________________
>>LARTC mailing list
>>LARTC@mailman.ds9a.nl
>>http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
>
>
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next prev parent reply other threads:[~2005-10-25 12:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-25 12:36 [LARTC] Ip Src rewite Daniel Frederiksen
2005-10-25 12:45 ` Oscar Mechanic
2005-10-25 12:58 ` Daniel Frederiksen [this message]
2005-10-25 13:21 ` Oscar Mechanic
2005-10-25 13:25 ` Oscar Mechanic
2005-10-25 22:03 ` Daniel Frederiksen
2005-10-26 0:25 ` /dev/rob0
2005-10-26 1:20 ` Daniel Frederiksen
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