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Re: LVS-NAT & Internet access on real servers?

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: LVS-NAT & Internet access on real servers?
From: Peter Klapprodt <peter.klapprodt@xxxxxxxxx>
Date: Mon, 25 Jul 2005 17:43:28 +0200
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Graeme Fowler wrote:
> On Thu 21 Jul 2005 21:06:16 BST , Peter Klapprodt
> <peter.klapprodt@xxxxxxxxx> wrote:
> <snip>
> 
>> Any ideas on how to get internet access working on the real servers
>> using LVS-NAT? I've read something about virtual_routes in keepalived
>> but couldn't find any detailled instructions yet :(
> 
> 
> ..in exactly the same way you would for an ordinary masqueraded network:
> 
> 1. realservers use active director as default gateway
> 2. (on director) echo "1" >> /proc/sys/net/ipv4/ip_forward
> 3. (on director) set up masquerading:
>   iptables -t nat -A POSTROUTING -s <priv net>/<netmask> -d <priv
> net>/<netmask> -j ACCEPT
>   iptables -t nat -A POSTROUTING -s <priv net>/<netmask> -j MASQUERADE
> 
> and that's it!
> 
> Any packet which returns to the director which is not hooked by LVS as
> part of an active connection will fall through to the nat POSTROUTING
> chain and get masqueraded.
> 
> Works for me, like a charm.
> 
> Graeme

Thanks a lot, it works now. Actually I don't know what exactly the error
was as I tried it this way before and then searched for other ways. I
think I badly misconfigured something by accident :)

Again, thanks a lot!

Best regards,
Peter
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