Больше всего в логах настораживает:
Mar 9 17:48:05 server named[6724]: client 127.0.0.1#39540: query '1.1.168.192.in-addr.arpa/PTR/IN' denied
Mar 9 17:48:06 server named[6724]: client 127.0.0.1#52963: query '1.1.168.192.in-addr.arpa/PTR/IN' denied
Mar 9 17:55:29 server named[6724]: client 127.0.0.1#46625: query 'server.home.lan/A/IN' denied
Mar 9 17:55:30 server named[6724]: client 127.0.0.1#58375: query 'server.home.lan.home.lan/A/IN' denied
Mar 9 17:55:45 server named[6724]: client 127.0.0.1#44002: query '1.0.0.127.in-addr.arpa/PTR/IN' denied
Mar 9 17:55:46 server named[6724]: client 127.0.0.1#37594: query '1.0.0.127.in-addr.arpa/PTR/IN' denied
Mar 9 17:57:50 server named[6724]: client 127.0.0.1#56844: query '1.1.168.192.in-addr.arpa/PTR/IN' denied
Mar 9 17:57:51 server named[6724]: client 127.0.0.1#42212: query '1.1.168.192.in-addr.arpa/PTR/IN' denied
Mar 9 17:59:50 server named[6724]: client 127.0.0.1#39837: query '16.1.168.192.in-addr.arpa/PTR/IN' denied
Mar 9 17:59:55 server named[6724]: client 127.0.0.1#48770: query '2.1.168.192.in-addr.arpa/PTR/IN' denied
Mar 9 18:00:00 server named[6724]: client 127.0.0.1#35961: query '4.1.168.192.in-addr.arpa/PTR/IN' denied
grep hosts /etc/nsswitch.conf
hosts: files dns