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I'm wondering how best to go about this situation where I have a PC (running windows 7) which I am going to be using in an exhibition. I need the PC to be online so that it can push information to a web server, however, for security I only ever want one IP address (that of the webserver) to be able to connect to the PC. So I think I want to effectively set up a whitelist where only one IP can access port 80, does this sound right? Can anyone provide some advice on how to set this up securely? Cheers in advance for any pointers!