From: Nguyen Dinh Nam <64vn@cardvn.net>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] NAT over 2 providers (not load balance)
Date: Mon, 14 Feb 2005 22:19:31 +0000 [thread overview]
Message-ID: <421123F3.2030105@cardvn.net> (raw)
In-Reply-To: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAAENEVIhFsNkiQ6vTBNVSNQcKAAAAQAAAAwP1excSwi0q2AVixPMeQJAEAAAAA@web-profile.net>
> This does not work since all the packets are forwarded to the default GW
> which is ISP_GW_1.
in routing tables, you must have two rules to route packets with
different sources to different gateways first:
ip rule add from 172.17.31.5 lookup 1
ip route add table 1 default via $GW=ISP_GW_1
ip rule add from 172.17.31.7 lookup 2
ip route add table 2 default via $GW=ISP_GW_2
then
$IPTABLES -t nat -A POSTROUTING -s 172.17.31.5 -j SNAT --to-source $ISP_IP_1
$IPTABLES -t nat -A POSTROUTING -s 172.17.31.7 -j SNAT --to-source $ISP_IP_2
> As far as I remember, the routing decisions and policy are before the
> POSTROUTING chain in which the SNAT occurs...
Kernel Packet Traveling Diagram http://www.docum.org/docum.org/kptd/
might be helpful for you
in case you want load balacing your internet connections, you can
consult
http://selab.edu.ms/twiki/bin/view/Networking/MultihomedLinuxNetworking
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prev parent reply other threads:[~2005-02-14 22:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-14 20:27 [LARTC] NAT over 2 providers (not load balance) Mihai Vlad
2005-02-14 20:35 ` Ben
2005-02-14 20:47 ` /dev/rob0
2005-02-14 20:47 ` Tóth Nándor
2005-02-14 21:58 ` Peter Surda
2005-02-14 22:19 ` Nguyen Dinh Nam [this message]
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