How to set up access to the local network, which is behind the router?

Question

Computer networks

There is a network shown in the picture above. It is necessary to make computer No. 1 visible on the network for computers No. 2, 3, 4. I realized that I need to configure static routes, but I don’t know how to register everything correctly and where to register it. I will be glad to help.

Answer 1

Do NOT configure static routes, but enable the wr340gd router to the upstream network not through the WAN but through the LAN, in addition, disable the dncp server on it.