messages 로그를 좀 봐주세요...

Oct 26 18:33:53 ns last message repeated 2 times
Oct 26 18:34:33 ns named[31188]: lame server on 'headhunterspecial.com' (in 'headhunterspecial.com'?): 211.53.210.67#53
Oct 26 18:34:33 ns named[31188]: lame server on 'headhunterspecial.com' (in 'headhunterspecial.com'?): 211.53.210.66#53
Oct 26 18:34:33 ns named[31188]: lame server on 'headhunterspecial.com' (in 'headhunterspecial.com'?): 211.53.210.67#53
Oct 26 18:34:33 ns named[31187]: lame server on 'headhunterspecial.com' (in 'headhunterspecial.com'?): 211.53.210.66#53
Oct 26 18:34:33 ns named[31187]: lame server on 'headhunterspecial.com' (in 'headhunterspecial.com'?): 211.53.210.67#53
Oct 26 18:34:33 ns named[31188]: lame server on 'headhunterspecial.com' (in 'headhunterspecial.com'?): 211.53.210.66#53
Oct 26 18:34:33 ns named[31188]: lame server on 'headhunterspecial.com' (in 'headhunterspecial.com'?): 211.53.210.67#53
Oct 26 18:34:33 ns named[31187]: lame server on 'headhunterspecial.com' (in 'headhunterspecial.com'?): 211.53.210.66#53
Oct 26 18:34:33 ns named[31188]: lame server on 'mstone.co.kr' (in 'mstone.CO.kr'?): 211.115.204.39#53
Oct 26 18:56:48 ns named[31188]: message.c:782: REQUIRE(*rdataset == ((void *)0)) failed
Oct 26 18:56:48 ns named[31188]: exiting (due to assertion failure)
Oct 27 03:07:57 ns proftpd-standalone: proftpd shutdown failed
Oct 27 03:07:57 ns proftpd-standalone: proftpd startup succeeded

상단의 message로그 와 같이 약 19시경에 name 서버가 셧다운이 된것 같애요...
왜 그런지 모르겠어요...
요즘 한달에 한번꼴로 그런 일이 발생을 하네요....
메세지 보면 항상 있는 메세지들 같은데...저중에 무슨 특별한 메세지가 있나요..?

secure쪽의 로그는 이렇네요...
Oct 26 18:49:02 ns sshd[22076]: error: /etc/hosts.deny, line 10: bad option name: "/usr/sbin/safe_finger"
Oct 26 18:49:02 ns sshd[22076]: refused connect from 69.60.110.132 (69.60.110.132)
Oct 26 18:49:02 ns sshd[22077]: error: /etc/hosts.deny, line 10: bad option name: "/usr/sbin/safe_finger"
Oct 26 18:49:02 ns sshd[22077]: refused connect from 69.60.110.132 (69.60.110.132)