I have a slave DNS server that dumped a bunch of...
" error (unexpected RCODE REFUSED) resolving 'xxx.xxx.xxx.xxx.in-addr.arpa/PTR/IN'"
messages all the sudden, and DNS lookups to the slave server did not respond.
From what I can tell this is generally due to having forwarders in the configuration file that refused to respond.
However I do not have any forwarders in my configuration file, but it is configured as a slave DNS server for my zone.
The odd thing is, a restart of the slave DNS server fixed the issue and I no longer got those errors, no action was taken on the upstream master.
Any thoughts on what may have caused this?