Setting up a home network wifi-ap/proxy/router etc

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http://www.linuxquestions.org – Hi all, I have a small atom based pc running Ubuntu 9.10 x64, which I want to use as a proxy, file server, and wifi access point. The box has 4 NICS, two of which are ethernet wired, two are 802.11. One of the wired network NICs is connected to a BT home hub via DHCP. I can control the address range/subnet for this interface. I want this to be the default path to the internet for all traffic other than that of a specific application (ftp). One of the wifi cards is connected to a different access point (which I have no control over) via DHCP. The other two NICs are operating as access points (HowTos)