Stephane Bortzmeyer wrote:
On Thu, Dec 04, 2008 at 04:51:20PM -0500,
Keith Moore <moore(_at_)network-heretics(_dot_)com> wrote
a message of 40 lines which said:
Not a week goes by when I'm not asked to figure out "why people
can't get to a web server" or "why email isn't working". In about
70% of the web server cases and 30% of the email cases, the answer
turns out to be DNS related. IP failures, by contrast, are quite
If it were true, I would wonder why people never use legal URLs like
because IPv6 literals wouldn't work for the vast majority of users today?
I do see links to URLs with IPv4 address literals. sometimes they're a
but you're really missing the point, which is that DNS fails a lot.
note that DNS failures aren't all with the authoritative servers -
they're often with caches, resolver configuration, etc.
Ietf mailing list