Sometimes, it is useful to allow the VPN server (or other VPN clients) to access resources connected to a particular client. This is known as client-side routing. Client-side routing in OpenVPN requires a CCD file for that client containing an
iroute statement. It also requires a corresponding
route statement in the OpenVPN server configuration file.
Consider the following network layout:
The subnet 192.168.4.0/24 needs to be accessible from the server-side LAN and the server-side subnet 192.168.122.0/24 needs to be accessible from the client-side LAN. This can be achieved as follows: