In anticipation of the MyDoom.B payload striking www.microsoft.com tomorrow, Microsoft have shortened the TTL on the www.microsoft.com DNS entry to 60 seconds. Yesterday the TTL was set to just under an hour.
Essentially, Microsoft is accepting the significantly higher load on its name servers [outsourced to Akamai] as the premium of an insurance policy in the event that it wants to move www.microsoft.com very quickly.
In this regard Microsoft is being very circumspect towards the potential payload of MyDoom B virus, which anti-virus companies have tended to belittle. Of course, this may simply reflect the fact that Microsoft is directly at risk from the payload, while the anti-virus companies are merely informed bystanders, rather than Microsoft's view of the likely traffic levels being significantly different to the anti-virus companies' expectations.
http://news.netcraft.com/archives/2004/02/02/microsoft_shorten_wwwmicrosoftcom_ttl_in_anticipation_of_mydoomb_payload.html

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