Bad zone transfer request

Issue

• A DNS zone transfer can be done from a server (1.2.3.4) to a master DNS server:

# tail -f /var/log/named/named.log | grep 1.2.3.4
16-Apr-2014 14:40:14.805 xfer-out: info: client 1.2.3.4#49637: transfer of 'myzone.com/IN': AXFR started
16-Apr-2014 14:40:14.805 xfer-out: info: client 1.2.3.4#49637: transfer of 'myzone.com/IN': AXFR ended

• But if a caching name server is used, it fails:

# tail -f /var/log/named/named.log | grep 1.2.3.4
16-Apr-2014 13:38:22.638 xfer-out: info: client 1.2.3.4#54455: bad zone transfer request: 'myzone.com/IN': non-authoritative zone (NOTAUTH)