[44911] in North American Network Operators' Group
Re: microsoft
daemon@ATHENA.MIT.EDU (Christopher A. Woodfield)
Sat Dec 29 11:18:17 2001
Date: Sat, 29 Dec 2001 11:19:56 -0500
To: Ian A Finlay <iaf@andrew.cmu.edu>
Cc: Christopher Schulte <schulte+nanog-post@nospam.schulte.org>,
nanog@merit.edu
Message-ID: <20011229111956.B15521@semihuman.com>
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In-Reply-To: <Pine.GSO.4.33L-022.0112281329440.4179-100000@unix4.andrew.cmu.edu>
From: "Christopher A. Woodfield" <rekoil@semihuman.com>
Errors-To: owner-nanog-outgoing@merit.edu
What you're seeing is MS using Akamai's Edgesuite service. Basically,
www.microsoft.com CNAMES to www.microsoft.akadns.net, which resolves to
the "closest" Akamai server to the source IP on the DNS query. That box
caches the content from the *real* www.microsoft.com, and serves it up.
Nice concept, and a helluva lot easier to implement on the end user side
than FreeFlow, IMHO...
-Chris
On Fri, Dec 28, 2001 at 01:40:48PM -0500, Ian A Finlay wrote:
>
> On Fri, 28 Dec 2001, Christopher Schulte wrote:
> > Looks to me as if Microsoft is altering global delegation of their
> > windowsupdate service. Maybe diversifying the dns structure as they did
> > with microsoft.com after the attacks a while back? They now have 12 DNS
> > servers scattered around the globe, just to serve microsoft.com dns.
>
> Yeah, maybe they're moving they're update service from windowsupdate.microsoft.com to
> windowsupdate.com. Maybe they'll "Akamize" windowsupdate.com too...
>
> bash-2.04$ host www.microsoft.com
> www.microsoft.com is a nickname for www.microsoft.akadns.net
> www.microsoft.akadns.net has address 207.46.230.218
> www.microsoft.akadns.net has address 207.46.230.219
> www.microsoft.akadns.net has address 207.46.230.220
> www.microsoft.akadns.net has address 207.46.197.100
> www.microsoft.akadns.net has address 207.46.197.101
> www.microsoft.akadns.net has address 207.46.197.113
> www.microsoft.akadns.net has address 207.46.197.102
>
> bash-2.04$ host windowsupdate.microsoft.com
> windowsupdate.microsoft.com has address 207.46.106.88
>
> bash-2.04$ host windowsupdate.com
> windowsupdate.com has address 207.46.106.88
> windowsupdate.com has address 207.46.226.17
> windowsupdate.com has address 207.68.131.27
>
> -Ian
>
>
--
---------------------------
Christopher A. Woodfield rekoil@semihuman.com
PGP Public Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xB887618B
