Nameserver ns0.balug.org responds to ping, responds to DNS queries, _but_ refuses AXFR request for zone balug.org from slave nameserver ns1.linuxmafia.com. (Below mail from logcheck shows the first appearance of refusal in the logs; this behaviour is still ongoing.)
[rick@linuxmafia] ~ $ dig -t axfr balug.org @96.86.170.229 ;; Connection to 96.86.170.229#53(96.86.170.229) for balug.org failed: connection refused. [rick@linuxmafia] ~ $
----- Forwarded message from logcheck system account logcheck@linuxmafia.com -----
Date: Thu, 16 Jan 2020 12:02:01 -0800 From: logcheck system account logcheck@linuxmafia.com To: root@linuxmafia.com Subject: linuxmafia.com 2020-01-16 12:02 System Events
System Events =-=-=-=-=-=-= Jan 16 11:33:15 linuxmafia named[4620]: client 96.86.170.229#6229: received notify for zone 'balug.org' Jan 16 11:33:15 linuxmafia named[4620]: zone balug.org/IN: Transfer started. Jan 16 11:33:15 linuxmafia named[4620]: transfer of 'balug.org/IN' from 96.86.170.229#53: failed to connect: connection refused Jan 16 11:33:15 linuxmafia named[4620]: transfer of 'balug.org/IN' from 96.86.170.229#53: Transfer completed: 0 messages, 0 records, 0 bytes, 0.028 secs (0 bytes/sec)
----- End forwarded message -----