Re: Geo location to IP mapping

[Daniel Senie <dts () senie com>]

At 10:39 AM 5/16/2006, Tao Wan wrote:

> Here is a tech report with a survey on geolocation and evasion techniques:
>
> http://www.scs.carleton.ca/~jamuir/papers/TR-06-05.pdf

This document seems to miss one other fairly common way in which 
geolocation fails: VPN. Whether a single user VPN session in which 
the user's laptop obtains an IP address from the VPN gateway, or a 
subnet extended out across a VPN to a remote office, the user(s) will 
appear to be at the location of the VPN concentrator. While ping 
latency, if even transported over the VPN, may show a greater 
distance than other IP addresses in teh neighborhood, there is no 
clear way to know why that latency is higher. It's odd this was omitted.