Hi,
we have migrated our internet access with fewer IP available. Then using a reverse proxy to have only one IP going to several servers what then obvious !
After some search and comparing a few product i went to nginx because i found an howto on this site :
http://korben.info/configurer-nginx-reverse-proxy.html (useful for french user)
And then it went quite quikly to have it work !!
If i'm there this is because i have some trouble (!) but this is another story and another post !