Configuration problems

ororo

Hello everybody.
I have the following situation.
I manage 2 servers inside a private LAN, and I want to access them from outside.
As far as I know, the LAN is under a simple router, and there is no possibility of doing any kind of "NAT" in the router. I can just do a port mapping, e.g. I can map the public port 1194 with the port 1194 of one of my servers.
OpenVPN is installed in one of the two servers.

Now, I can access the server, but I cannot access the other one.

What is the correct way of configuring OpenVPN?

Probably the simplest thing would be to tell the OpenVPN server to assign virtual IP's beginnning with the same prefix of the LAN (I mean, 192.168.20.xxx), however I am not able doing this. I don't want to conflict with the existing IP's.

Thank you.

ororo

Anyone?

Maybe I need a bridged connection?

ororo

@debbie10t,
thank you for your answer. I already seen that documentation, however I have a problem:

Next, you must set up a route on the server-side LAN gateway to route the VPN client subnet (10.8.0.0/24) to the OpenVPN server (this is only necessary if the OpenVPN server and the LAN gateway are different machines).

As I said, the LAN router is very simple, and it is not able doing so.

ororo

I enabled port forwarding.
I.e., the public IP, port 1194, is mapped to the (private IP of the) OpenVPN server, port 1194.

ororo

What OS is your server ?

Windows server 2008

Also, is the router, where you have enabled port forwarding, the default gateway for your LAN ?

Yes it is.

Not port forwarding on your router, IP forwarding on your OpenVPN server.

No I don't... how could I do? thank you!