I have a LAN (10.1.4.x / 255.255.252.0 and gateway of 10.1.4.100). I would like to connect a wireless router so that visitors can access the Internet but not the rest of our LAN. I picked up a Linksys E1000 in hopes of doing this. I configured its WAN port (10.1.4.235 / 255.255.255.0 and gateway of 10.1.4.100). I configured the router's IP as 192.168.100.1 / 255.255.255.0 and enabled the DHCP server on it with 192.168.100.101-150 as the IP range for clients. With NAT enabled I am able to get on the Internet, however I can ping all the IP addresses in the 10.1.4.x and 10.1.5.x. ranges on our LAN, something I do not want to be able to do from this device. I tried RIP and Static routing (created a route as follows: Destination LAN IP: 10.1.4.0 / 255.255.255.0 and gateway of 10.1.4.100 - I also tried a gateway of 192.168.1.100 but it would not accept it), but could not reach anything beyond the 10.1.4.235 address (the IP I assigned to the WAN). Any ideas?