It may not be so complex; many proxies (e.g. squid) will pass on a header to the remote HTTP server containing the proxy client's IP address.
http://www.linofee.org/~jel/proxy/Squid/rel-notes-1_1.html#x --j. Mike Liebhold writes: > Kevin Elliott wrote: > > > Can you elaborate on what you believe they are doing? > > The most plausible answer is that some website that has my address that > I volunteered to recieve a service or to buy something, matched my > street address to my IP address and sold the data to an IP gelocation > agregator. > > > > > Kevin > > > > > >> http://local.live.com/ > >> > >> My home IP address is officially registerd to a proxy server in San > >> Diego. I'm connected via satellite behind the proxy from a very > >> remote location in northern California, and yet the findme utility > >> properly identified my actual geographic position. The satellite > >> service provider has -not- revealed my actual address. ( I checked > >> with friends in their net ops center.) The data for local.live.com > >> was purchased from a commercial ip geolocation service who > >> determined my actual, rural location using undisclosed mechanisms. > > > > > > _______________________________________________ > > Geowanking mailing list > > [email protected] > > http://lists.burri.to/mailman/listinfo/geowanking > > > > > _______________________________________________ > Geowanking mailing list > [email protected] > http://lists.burri.to/mailman/listinfo/geowanking _______________________________________________ Geowanking mailing list [email protected] http://lists.burri.to/mailman/listinfo/geowanking
