[nycbug-talk] dns slaves serve up empty data

Miles Nordin carton at Ivy.NET
Thu Jul 30 22:22:36 EDT 2009

>>>>> "ms" == Marco Scoffier <marcoscoffier at gmail.com> writes:
>>>>> "b" == billtotman  <billtotman at billtotman.com> writes:

    ms> I was trying to test the zone transfer with telnet

the way you test zone transfers is:

 dig metm.org. axfr @primary

Also in other cases of debugging broken slave servers, but not this
case, you may want to check:

 dig metm.org. soa @<primary or secondary>

and look at the serial number.  The slave will not AXFR unless the
master has a higher serial number.  but, that is not your problem
because the slave is reporting SERVFAIL rather than old data---your
guess that the slave cannot download the zone and the Expire time in
the SOA has elapsed, is probably right.

     b> Have you seen the latest DNS security reports and applied the
     b> latest patches?

pfft, whatever.
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