:: On Fri, 18 Sep 2015 17:46:12 +0200 :: <20150918174612.00006...@gmx.net> :: Grayhat <gray...@gmx.net> wrote:
> :: On Fri, 18 Sep 2015 11:39:06 -0400 > :: > <CALhpkA=kdvR1myMUtmbpE_kAVc=R2Yb=cniu1tesxhwkmua...@mail.gmail.com> :: > K Post <nntp.p...@gmail.com> 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 > also (sorry, saw your previous reply after sending my message), since you're running your own DNS servers, try enabling some logging on the DNS servers and/or use the "dnstop" tool to monitor your DNS traffic and check for issues http://dns.measurement-factory.com/tools/dnstop/ HTH ------------------------------------------------------------------------------ _______________________________________________ Assp-test mailing list Assp-test@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/assp-test
