Port Forwarding: Two or More Routers
If you do not know how to port forward yet, we recommend learning more here before proceeding with this guide. If you have already opened the ports on your router, you may find that they are still closed. If you have already narrowed the issue down to the fact that there are two or more routers, continue reading below.
What is the problem?
To help you understand what the problem may be, try to visualize your routers as traffic gates. If you opened the first gate, you may drive until you hit the second gate. You would have to also open the gate for traffic to continue. Luckily, port forwarding in the case of two or more routers is no more difficult than it already is!
Finding the Second Router
Note: This guide assumes you are already familiar with accessing the router and port forwarding.
Step.1 Do the normal port forwarding for your recorder and DVR. If you do not know how, learn more here.
Step 2. You must now find the IP address of your second router. The easiest method of doing so is by looking up the first router's WAN IP address. Unfortunately, there is no uniform method of finding the router's WAN IP across the board. If you do not know how, we recommend that you contact the router's manufacturer for assistance.
For the guide, we will use an Asus router. As you can see below, the router's WAN IP is 192.168.107.103.
Step 3. We can now assume the second router's IP address is 192.168.107.1 from the WAN IP. Default gateways almost always end in 1.
Step 4. On the second router, you must do port forwarding. The ports you open are the same as the ones you opened on the first router. However, instead of the recorder's IP address, you use the first router's IP address for port forwarding on the second router. Click here for basic port forwarding instructions.
Step 5. If you have more than two routers, repeat steps 2-4 with router #2 and #3, then #4 and #5, and so on.