Routing using Linux with 2 NIC cards

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http://serverfault.com – Configured Clear OS to be in Gateway mode on a machine with two NIC cards. eth0: with ip which is connected to a modem and thus have internet connectivity. eth1: with ip which is connected to other machines in LAN through switch. LAN machines with network is not getting internet.How can they get internet Through Clear OS gateway.I have enabled packet forwarding in clear os using "ip_forward=1" What am i missing?.Can you please help me in this. Following are the static routing i have added: on LAN machine1 with ip addre (HowTos)