I have a OpenVPN access server version 2.5 and a client configured with a site-to-site routing. Both client and server can communicate with each other by using the private IP addresses. On the client, there is an Apache server which listen on port 8081.
The goal is to be able to connect to the OpenVPN server public IP, and have it forward the connection to the client, so that the user can access the Apache server behind.
My current setup is:
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sysctl -w net.ipv4.ip_forward=1 iptables -t nat -A PREROUTING -d 50.xxx.xxx.xxx -p tcp --dport 8081 -j DNAT --to-dest 192.168.2.86:8081 iptables -t nat -A POSTROUTING -d 192.168.2.86 -p tcp --dport 8081 -j SNAT --to-source 10.0.2.42