Am 12.04.2014 17:05, schrieb Paul Wouters: > On Sat, 12 Apr 2014, Reindl Harald wrote: > >> nonsense - there are so much ISP nameservers broken out there >> responding with wildcards and so on that you can not trust them >> and you will realize that if not before after you started to run >> a production mailserver which relies on NXDOMAIN responses for >> proper operations > > That's not what the http://atlas.ripe.net/ data set indicates. Your > story seems anecdotal and incidental. if you call the year 2012 anecdotal then yes > Yes, there are a few bad players out there (like Rogers in Canada) but > those are in a minority it is not a matter of bad players, it is a matter of stupid admins on ISP sides - the case of our server was the largest ISP here and they simply had bugs in der load-balcing resulting in random results (current and outdated) from the same nameserver IP another one was also a large ISP which started 2013 to give that wrong answers for our ipv4 address in 2013 because they fucked up their DNS due try to implement ipv6 in both cases i know for sure what happened at the ISP note that the change was done in 2011 and we are even the GLUE record another big player at that time was OpenDNS sicne there are not too much DNS servers of ISP answering to non customer ip addresses i found around 50 public nameservers all over the world and 15 of them where wrong after more than 7 months - yes it is a minority because it's below 50% but *way too much* for such a critical service like DNS and here i did not talk a single time about overloaded and not responding IPS DNS again and again - we had many years massive troubles to access websites and it was always "could not be found" in Firefox which means no DNS answer - guess what - after no longer using forwarders nobody has seen that message again
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