From: "Richard Nairn" <Richard@nairnconsulting.ca>
To: "Kirkwood, David A." <DAVID.A.KIRKWOOD@saic.com>,
linux-admin@vger.kernel.org
Subject: Re: Linux system as a router
Date: Tue, 07 Apr 2009 14:35:33 -0600 [thread overview]
Message-ID: <op.ur095jnoizdgzp@w5-cal-h014058.nrn.nrcan.gc.ca> (raw)
In-Reply-To: <2E9F9B9B52306D4DB3DEE15E678BDE61011EE61A@0668-ITS-EXMP02.us.saic.com>
If you are doing NATting at the router you need a rule such as
iptables -t nat -I POSTROUTING -o eth0 -j MASQ if you have a dynamic address, or
iptables -t nat -I POSTROUTING -o eth0 -j SNAT --to-source 1.2.3.4 if you have a static address
you also need net.ipv4.ip_forward=1 in /etc/sysctl.conf
Then have your default route go out your WAN interface.
On Tue, 07 Apr 2009 14:13:18 -0600, Kirkwood, David A. <DAVID.A.KIRKWOOD@saic.com> wrote:
> How do I set up iptables to make the linux system function as a router?
> I think I need to set forwarding between the two interfaces, but I don't
> understand the syntax of the command.
>
> Thanks,
>
> David A. Kirkwood
>
>
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next prev parent reply other threads:[~2009-04-07 20:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-07 20:13 Linux system as a router Kirkwood, David A.
2009-04-07 20:35 ` Richard Nairn [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-04-07 20:33 Uwe Kiewel
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