I was reading the manual for a Linksys RV042 router & it stated that the router should have a different IP address than other PC's or devices on the network. I sort of thought "DAH". But then it said if the network is the default "192.168.1.0" then the router's IP should be, according to their example, something like "192.168.2.1", to avoid any conflict between the VPN IP address and the local IP address,
If the router uses "192.168.1.1" as its local IP address & the static IP that the ISP gives you for the public IP & the router is the DHCP server also, where would there be a conflict. It wouldn't give out "192.168.1.1" to a PC or device again.
I am having problems getting 2 RV042 to connect thru a gateway-to-gateway VPN tunnel. So far I haven't been successful so this is one of the things I am exploring.