I'm trying to figure out how to route OpenVPN clients without using NAT/PAT. What I want to do is to route the IP address that they are assigned when clients authenticate to the OpenVPN server to the network (in the server.conf file). My OpenVPN server is directly connected to my gateway. I don't want it masquerading, as that makes it hard to track down individual clients by IP and causes other issues. I'm sure it's probably something that I need to do in iptables, but I'm at a loss for how to do it. Any help would be appreciated.
OP clarifies
"I want the IP that the server.conf is giving out to the clients to traverse the inside of my network - I might have confused some by suggesting that I don't want that IP address to work...if so I apologize. What I want is to not have to PAT between the tun0 interface and the inside interface of my OpenVPN server. I want each client to have their own IP address inside the network, not the IP address of the inside interface of the server."
added by barlop
Here is a diagram