I want to use a router (Netgear RT314) as a type of firewall inside a LAN. Basically I want to separate a less secure section of the LAN from the main part of the LAN.
The way I was thinking of doing it was to connect the main part of the LAN to the LAN port of the router and the less secure part to the Internet port. I think this should allow traffic to flow freely from the main part of the LAN to less secure part of the LAN but block all traffic from the less secure part to the main part. (The router is configured to block all traffic from the Internet side)
I have tried this with my router and it does not seem to work. I have tested using 2 pc's with addresses 10.0.0.110 and 10.0.0.150 and a subnet of 255.255.255.0. The PC on the LAN side of the router can not ping the machine on the Internet side. When I attach them both to the LAN side they can ping each other as expected. The machine on the LAN side can also ping the router 10.0.0.102 OK.
Appreciate any comments.