Re: DUAL wan issue, destination-based routing

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On Wednesday 2008-05-28 07:03, Patrick McHardy wrote:

> jeev wrote:
>> Hey guys, i was reading on the netfilter site.
>> 
>> I saw Patrick McHardy wrote about having 2 cable modems... i'm in the
>> same situation... my only problem is that I dont want to do load
>> balancing, i've just come from using PFSENSE/freebsd to use
>> ClarkConnect on CentOS i guess.. i've never used iptables before. i've
>> tried things like:
>> 
>> "iptables -A POSTROUTING -t nat -o eth2 -s 192.168.2.0/24 -d
>> 67.17.117.0/24 -j MASQUERADE" and it still doesn't work.
>> 
>> 192.168.2.0/24 dev eth1  proto kernel  scope link  src 192.168.2.1
>> 24.x.x.0/23 dev eth2  proto kernel  scope link  src 24.x.x.23
>> 71.x.x.0/23 dev eth3  proto kernel  scope link  src 71.x.x.6
>> default via 71.x.x.1 dev eth3
>> 
>> so right now i have all traffic go out eth3, i'd love to have the ips
>> and ipblocks i select and have it go out one of the cable interfaces.
>> so for the example above, i want www.speedtest.net (because it shows
>> the ip) to go out eth2 but it's still going out eth3.
>
>[...]
> You can use any criteria you like for distribution, the important
> thing is to make sure connections stay on one connection when using
> NAT (since many providers don't allow spoofed addresses), [...]
> Dealing with incoming connections on both internet connections
> is trickier because you need to make sure they go out the same
> way they came in, so I'll skip this because I'm short on time
> right now :)

As described in http://dev.medozas.de/NF-Cookbook.txt.

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