Let’s assume that you have two devices, A and B. A is connected to the pcWRT, therefore, will have IP address 192.168.10.x. B is connected to the Asus, and will have IP address 192.168.1.y.
A is able to contact B by the IP address 192.168.1.y. For example, you can ping B from A with the IP address 192.168.1.y. Or, access file sharing with the same IP address.
However, B cannot see A, since A is hidden behind pcWRT’s NAT. When A pings B, B thinks it’s pcWRT pinging. If you have a service running on A (for example, a web server), and you want it to be available to B. Then you need to set up port forwarding on the pcWRT.
Suppose you have a web server running on A on port 80. Then you need to enter these parameters:
1. Name: whatever you chose, e.g., Web Server
2. External Port: any number less than 65535, e.g., 8080
3. Internal Address: A’s IP address (192.168.10.x)
4. Internal Port: port of the web server running on A, i.e., 80 in this example.
After the above is done, you can access the web server running on A from B with http://192.168.1.14:8080 (i.e., the WAN IP address of pcWRT and external port above).