[81503] in North American Network Operators' Group
Re: IP->Country Data (RE: ISP's Contact List)
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Mon Jun 13 18:36:16 2005
In-Reply-To: <Pine.LNX.4.62.0506131141300.25951@sokol.elan.net>
Cc: "Patrick W. Gilmore" <patrick@ianai.net>
From: "Patrick W. Gilmore" <patrick@ianai.net>
Date: Mon, 13 Jun 2005 18:35:48 -0400
To: nanog@merit.edu
Errors-To: owner-nanog@merit.edu
On Jun 13, 2005, at 2:55 PM, william(at)elan.net wrote:
> Commercial service when there are several free ones available....
>
> BTW - based on what I can see they are not updating data once per
> day but only once/month. Also having some experience in this matter
> I highly doubt that its much more accurate then what I got - it
> appears no matter what path you take to get the data, it would to a
> degree be wrong (difference
> being which part is wrong). One possible way to resolve some issues
> could
> be to have testing servers placed in several locations and analyze
> TTL for connections to various ips to determine how far its from
> several servers -
> of course it would also not be accurate as ip networks are not
> necessarily interconnecting in the same region (CAIDA did their
> best with this method
> some time ago but have not kept updated data as far as I know).
Too bad no one has servers in 100s or even a 1000 or more ISPs in
dozens of countries with TCP connections to a statistically
significant portion of the Internet on a daily basis who could
possibly measure, say, RTT (not sure why TTL is relevant) and other
things, and perhaps use that along with other information to create a
database that they could then give to customers who need geo-location
data for their "mission critical" applications.
That would probably be pretty darned accurate.
Of course, that would be a "commercial service"....
=)
--
TTFN,
patrick
