How is it easier and faster to connect to NetBIOS if I'm behind a WAN port?

Question

Computer networks

There are two local networks connected by a router. The first gets access to the Internet through the second. From the point of view of the first network, I am somewhere on the Internet. What is the easiest way to connect to a network folder on the first network?

Answer 1

That's right - only a vpn server in this local network (for example, set up on the router itself) with an external connection to this network, all other options are limited (for example, machine search by netbios name will not be available, only by ip).

Answer 2

Throw a cable from WAN to LAN on the second router, turn off DHCP, and assign an IP from the range of the first router. Then all clients will live in one network.
The second option, on the second router in the DMZ section, specify the IP of the PC with the network folder, then when you access the IP WAN port, you will get to the network folder of the PC. But it's not very flexible, so you'll only get access to one PC on a different network.