:: On Fri, 18 Sep 2015 11:39:06 -0400
:: <CALhpkA=kdvR1myMUtmbpE_kAVc=R2Yb=cniu1tesxhwkmua...@mail.gmail.com>
:: K Post <[email protected]> wrote:

> I can't imagine what could be going wrong with my DNS servers, but I
> will absolutely dig deeper!  Thanks for the fix and for pointing me
> in the right direction.  DNS issues are no joke.

assuming your DNS servers are sitting behind a firewall, ensure that
they're able to connect to external DNS servers on port 53 UDP *and*
TCP, also ensure that "oversized" UDP packets used for EDNS are not
dropped by some firewall rule

https://en.wikipedia.org/wiki/Extension_mechanisms_for_DNS

http://www.petenetlive.com/KB/Article/0000312.htm






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