Here is my configuration:
As you see I have two RUT240 with the same LAN configuration and the same IP address. Only one router is connected to the Internet (through Wi-Fi, 4G or Ethernet). I would like to connect the second RUT240 to the first one (or in the other way) through the Wi-Fi (DHCP) in order to get Internet. The problem is that I need to avoid LAN networks from communicating between each other as they have an identical IP mapping. In my example I have only 2 RUT240 but in reality I could have a hundred of them that’s why I don’t want to use different IP addresses from a system to another… Also I need to access to their LAN through a VPN. Thank you in advance for your help!