Content Delivery Networks

John Levine johnl at
Fri Aug 10 16:46:29 UTC 2007

>Very interesting.  We've all heard and probably all passed along that little
>bromide at one time or another.  Is it possible that at one time it was true
>(even possibly for AOL) but with the rise of CDNs, policies of not honoring
>TTL's have fallen by the wayside?

I think you'll still see it in spam zombies, some of which have the DNS info
pre-loaded into them in order to avoid split-horizon anti-spam techniques.

Not much we can do about that until we get sufficient backbone to deal
with the zombie problem and its software enablers.

John Levine, johnl at, Primary Perpetrator of "The Internet for Dummies",
Information Superhighwayman wanna-be,, ex-Mayor
"More Wiener schnitzel, please", said Tom, revealingly.

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