Hi, On Sun, Apr 26, 2015 at 4:36 PM, Ian <barnracoon at gmail.com> wrote: > Hi > > I am having a weird problem which I cant figure out - so I was hoping > someone here could give me a hand. > > First off the end goal is that a specific server in my network runs an > IPSEC connection to another company and I want all other servers to route > traffic for the IP on that network through this single server. > > Server 1 in this example is the server that runs the IPSEC connection. > (CentOS 6.6) > > Server 2 in this example is an app server that would route traffic for only > that specific IP through server 1. (CentOS 6.5) You can follow below link to setup the IPsec site to site VPN tunnel between two GW. < http://www.enterprisenetworkingplanet.com/netsysm/article.php/3845966/Build-an-IPSEC-VPN-Without-Losing-Your-Mind.htm > After that you have to open up the following port is your Firewall and add route on both gateway for communicating to respective LAN, iptables -A input_rule -p esp -j ACCEPT iptables -A input_rule -p udp --dport 500 -j ACCEPT iptables -A input_rule -p udp --dport 4500 -j ACCEPT --Regards Ashishkumar S. Yadav