Hello all, Many thanks to everyone who responded with extremely helpful tips. Reporting back that I implemented HAProxy on CentOS 6.3 and this works like a charm - after I worked out a couple of HAProxy kinks. Boris. On Sat, Jan 19, 2013 at 3:35 PM, Boris Epstein <borepstein at gmail.com> wrote: > Hello all, > > The question is not necessarily CentOS-specific - but there are lots of > bright people on here, and - quite possibly - the final implementation will > be on CentOS hence I figured I'd ask it here. Here is the situation. > > I need to configure a Linux-based network load balancer (NLB) solution. > The idea is this. Let us say I have a public facing load balancer machine > with an public IP of, say, 50.50.50.50. It is to receive the traffic (let's > say, HTTP traffic) and then route it to two private HTTP servers, let's > say, 192.168.10.10 and 192.168.10.11. It has to have persistence - i.e., be > state- and session-aware. If for whatever reason one of the servers goes > down the remaining pool shares all the traffic in some fashion (be it eound > robin, saturation based, whatever). > > We have tried Vyatta ( http://vyatta.org/ ) and ZeroShell ( > http://www.zeroshell.org/ ) and both are very good but their NLB seems to > be externally facing (i.e., you have several internet connections and are > trying to divide your traffic between them). What we need is an "internally > facing" one, if I may say so. > > Any advice on what may help us would be greatly appreciated. > > Thanks. > > Boris. >