unexpected rcode (SERVFAIL)

Scott Baker bakers at web-ster.com
Tue Apr 25 15:56:49 UTC 2006

I'm seeing a lot of SERVFAIL in my logs when my slave tries to
transfer zones from my primary:

zone 251.182.65.in-addr.arpa/IN: refresh: unexpected rcode
(SERVFAIL) from master

Most of it seems to be for my reverse DNS domains (which allow
DDNS). Is this the expected behavior for those domains? What exactly
does this error mean? I can't seem to find a corresponding log entry
on the primary. What should I be looking for?


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