[dns-operations] renesys blog: Identity Theft Hits the Root Name Servers

John Kristoff jtk at ultradns.net
Mon May 26 04:08:46 UTC 2008

On Thu, 22 May 2008 18:03:13 +0000
Paul Vixie <paul at vix.com> wrote:

> root hints are only to be used when there is no cached RRset for ". IN NS".
> anyone who sends more than one query per week to old-L has a software bug,
> not just an out-of-date hints file.

I believe some implementations, particularly at least some, maybe all,
from Microsoft limit the maximum TTL cache time to 86400 seconds.  I am
not sure I'd classify that as a bug, but that might explain some of the
higher than expected number of queries at the old L-ROOT than we might


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