[Linux-cluster] LVS: Not as a gateway?

[Christopher Hawkins]

 > -----Original Message-----
> From: linux-cluster-bounces at redhat.com 
> [mailto:linux-cluster-bounces at redhat.com] On Behalf Of 
> isplist at logicore.net
> Sent: Thursday, November 02, 2006 12:26 PM
> To: linux-cluster
> Subject: [Linux-cluster] LVS: Not as a gateway?
> 
>  From what I've seen, LVS can act as an NAT gateway, direct 
> routing or tunneling. 
> 
> The LVS machines are already under NAT under the firewall's.
> 
> I cannot change my web servers to point to LVS as this causes 
> too many complications but,  each server does have two 
> Ethernet interfaces.
> 
> I cannot really use NAT as the machines are already under NAT 
> to my firewall's so, what's the best way of dealing with this 
> without creating another sub networking within?
> 
> Mike
> 

You would probably want direct routing. "Direct" means on the same network
as the director, and able to use the same gateway to the outside world. An
outside client would access services by sending a packet to your firewall,
which would forward it to the director, then the director would choose an
LVS "real server" to send it to for processing, and then the real server
that got it would reply "directly" to the client without further
intervention from the director machine. 

Chris