Ethernet to Wireless [migrated]

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http://serverfault.com – I have a computer that is connected to the internet via wifi. I then have a ethernet cable coming out from my wifi computer into another computer which has no wifi or place to plug into ethernet. I have shared the wifi connection to the LAN port, and the computer successfully gets internet. But, on that computer I have a FTP server that I want the wifi network to be able to connect to. Since the computer is connected to the ethernet port, I can't access it from another computer on wifi. Does anyone know how I could do this? (HowTos)