I have a 2 subnet (internal) network connected to a redhat 7.3 box with 2 nics. The linux box is the gateway to the internet for my 2 lans via ip MASQ configured in ipchains. Linux is connected to subnet A on eth1 and the internet on eth0 (just for clarity) for subnet B I have a linksys BEFW1154 which connects to subnet A throught the WAN port. I changed the linksys to router mode instead of gateway mode and the static routes are configured on both the linksys and the linux boxes. Here is the problem: subnet A CAN communicate with subnet B and vise versa and Subnet A CAN access the internet but Subnet B CANNOT.