What does “error (unexpected RCODE REFUSED)” mean?
If you’re seeing this in the /var/log/syslog on your BIND DNS server: Jul 14 00:56:13 kla-dns-01 named[8255]: error (unexpected RCODE REFUSED) resolving ‘75.1.33.112.in-addr.arpa/PTR/IN’: 211.136.17.105#53 ..it means that a client has asked your server to look up a domain name that your server didn’t know about, and when it forwarded the request to it’s forwarders, the …
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