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I have a small server at home that I plan on putting a few game servers on, but I want to make sure only people from my country can join it.

Is it possible to filter connection attempts to my server based on port? Say a game runs on port 12345, could I block all international traffic to that single port?

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What OS are you running ? – topdog Aug 3 '10 at 9:46
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migrated from serverfault.com Aug 3 '10 at 13:22

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2 Answers

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Well, of course it is possible, you simple need a database like Maxmind or IPLocation (http://www.ip2location.com), there you will find the information needed.

Regarding the port, you can use any opensource firewall to filter any access to that port coming from outside your country.

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I don't think IPv4 is geographically distributed, so unless you have a database of "national" or "international" IPs, it's a no go.

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Actually, it is. IP-Ranges are getting assigned to the ISPs, which are (most of the time) located in one country. – Bobby Aug 3 '10 at 13:28
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