The easiest way is to use NAT. The router has some external IP, which is where we will connect. Go to the "Security" section with the shield icon. Before doing so, I advise you to check the router login. Click on the first tab and then "Add Rule." In "Description," you can write any name you like. For example, "Access to router." In "Interface," it is very important to specify an external Internet network. That is, you specify the connection you are connected to the World Wide Web. The protocol is automatically set to "TCP/UDP and ICMP." Click "Redirect to address" and then select "Other." Enter the IP of the router.