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Re: Question regarding anycasting in CDN setup
From: Brett Watson <brett () the-watsons org>
Date: Wed, 8 Feb 2012 12:04:22 -0800

On Feb 8, 2012, at 11:58 AM, Anurag Bhatia wrote:


I can also have a single DNS
server give out to queries sourced from a US IP Address, for queries sourced from a German IP Address and to queries sourced from a Chinese address (djbdns has a
module for this for example).

I have never did such setup, but I assume it works as you say. I wonder how
it finds a US based system from IP quickly (since it's DNS server)?

Here is *one* method if you obtain a feed of geo-ip data from someone like Maxmind:


Several DNS providers have different methods and different geo-ip data vendors.


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