LVS Question?

Abdalla N. A. A. administrator at mistoclub.com
Wed Mar 1 16:29:42 GMT 2006


Hi all,

I've got a same problem. I have lb + 2 real serves behind NAT.
I need to specify lb as gw on both real servers. SNAT can avoid this,
but
> 6) The LB rewrites the packet and sends it back to the internet client.
As far as I know, IPVS doesn't have this feature for SNAT.
Correct me, if I were wrong.

Any suggestions?

Thanks in advance!

----- Original Message ----- 
From: "spamsucks72" <spamsucks72 at cox.net>
To: <lvs-users at linuxvirtualserver.org>
Sent: Monday, February 27, 2006 6:11 PM
Subject: LVS Question?


>
> Hello All,
>
> I am working on a trying to use LVS to do the following.
>
> My question is can an open source load balancer function like my old
> (broken) F5 in the architecture below?
>
> Here is the current load balancer architecture with the F5:
> Requirements
> 1) There is only IP sub network (164.99.13.1, 255.255.255.224, broadcast
> 164.99.131.31)
> 2) Load balancer setup to use only one NIC (F5 calls it Load balancer on a
> stick)
>
> Example:
> Virtual IP address and port: 164.99.13.21:80
> GW (Firewall): 164.99.13.1 (Box1)
> Real Servers: 164.99.13.11 (Box2), 164.99.13.12 (Box3)
> Load Balancer Real: 164.99.13.2 (Box4)
> Load Balancer SNAT: 164.99.13.3
>
> The Current flow of traffic:
> 1) Internet Client accesses 164.99.13.21
> 2) FW Box1 passes traffic to the Load balancer
> 3) The LB rewrites the packet putting the SNAT address in as the client
> 4) The LB sends the new packet the chosen real server (based on whatever
> algorithm is being used - Round Robin)
> 5) The real server serves up the page back the SNAT (LB) address.
> 6) The LB rewrites the packet and sends it back to the internet client.
>
> Has anyone set something like that up or know of a way to set something 
> like
> that up?  I have setup LVS with 2 NICs and networks, where the LB is the 
> FW
> too but I can not do that in this case.
>
> Any thoughts?
>
> Thanks, JMF
>
>
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