Wondering if someone can help me setup proper configuration for the following setup ( please see drawing )
What I need to do is allow clients that are connected through WIFI to access only LAN on router 2 and Internet through Router 1
But I do now want them to access any other networks
You are not giving us enough information. What other networks? You are not showing any other networks. Second, what purpose does router #1 serve? at least going by your drawing, router #1 does not serve any useful purpose.
I want Router 1 to face public internet and and under eth3 put DMZ and web servers
Router 2 is more like AP and also connected to LAN that cannot be accessed from Router 1
new attachment added