On Tue, 2 Oct 2007 01:48:36 -0600
Danny McPherson <danny(_at_)tcb(_dot_)net> wrote:
Again, any pointers empirical data along these lines would
be appreciated.
I said this awhile back:
<http://www.merit.edu/mail.archives/nanog/msg02196.html>
"As a datapoint I ran some tests against a reasonably diverse and
sizeable TLD zone I work with in another forum. I queried the name
servers listed in the parent to see if I could successfuly query
them for their corresponding domain name they are configured for
using TCP. Out of about 9,300 unique name servers I failed to
receive any answer from about 1700 of them. That is a bit more
than an 18% failure rate."
I think I overcompensated as I later found what looked like BIND 8
servers being unresponsive for multiple TCP queries in queue. I let
the numbers stay, since the percentage of those servers were fairly
small and, well, they were BIND 8 and probably have other problems
anyway. :)
John
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