Question regarding anycasting in CDN setup

Brett Watson brett at
Wed Feb 8 20:04:22 UTC 2012

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

> Mike
> 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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