[ubuntu] Help with wierd home network configuration and ICS

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http://ubuntuforums.org – With my home network, I am using wireless router that is connected to the internet, my headless server, and three other computers wirelessly. My goal is to add a second source of internet to the network by adding a wireless adapter to the server. In this network, the regular computers can not be used since they can't always be on/stable/in range. The problem is that I want the server to get internet from my router's connection - but at the same time, I want to disable dhcp in the router, set dhcp up in the server, and have it use ICS to share wlan0 with the three other computers. (HowTos)