How to forward ports in a network with more than one router. Port forwarding behind two routers can be tricky but we will show you how!
Forwarding the same port to multiple devices: Some models support different External Ports and Internal Ports. If you have two devices that need the same internal port open (for example, port 90 on both 192.168.0.106 and 192.168.0.103), create two separate rules using different External Ports (such as 9000 and 9001) and the same Internal Port (90).

Learn how to portforward with 2 routers and optimize your network configuration for seamless connectivity and improved performance.

port is essentially a virtual doorway on your router that allows traffic in and out for a particular application. When you port forward, youre telling your router to direct all traffic arriving on a specific port directly to a specific device on your network (in this case, a console).

No; When you forward a port you send all traffic to a single address. If you need 2 devices to receive the data on the same port then you need to forward it to a single device that connects those 2 additional devices to the network ( say another router for instance ).
No more than one device may use a port at a time. If you need multiple devices to connect via a single External IP address then you must use a secondary port when referencing the second device from outside youd have to use the alternate port.