Passive TCP/IP Geo-Location

Did you know your TCP/IP stack leaks information on your physical location? This website demonstrates IP address geo-location by passively measuring TCP/IP round-trip times of web requests made to a few servers spread around the world. The measurements are then used to approximate possible physical distances to the servers, and finally drawn on a Google Map. The common area of all circles (that is

[tmatsuu]

アクセス元IPアドレスに対するpingの応答時間のみから場所を推測。なるほど面白い。光の速度の限界から推測するわけか。正確ではないが地域の特定はだいたいできてる。

[kasumani]

Passive TCP/IP Geo-Location Did you know your TCP/IP stack inherently leaks information on your physical location? This website demonstrates IP address geo-location by passively measuring TCP/IP round-trip times of web requests made to a few servers spread around the world. Tags: from Pocket June 27

[zu2]

発想はいいな。