i need to do a setting a bit unusual.I have 3 machines with public Ips.I want to use one of them as a load balancer for the 2 others.My machine >> machine1 who redirect the connection to machine 2 or 3.If machine1 has 1 private ip on a network card and another network card with a public ip it work without any problem using very simple rules like :
port redirection with PF under OpenBSD
openbsd;tcp;pf