message파일에 있는 내용입니다.

언제부터인지 /var/log 밑에 message 파일에 다음과 같은 메세지 들이 자꾸 올라오는데

/etc/hosts 파일에는 realname 이라는 알리아스가 없는데 이상해요..

ping realname 치면 또 핑도 나가구요 ..

ping realname

PING realname (211.106.67.221) from 123.123.123.123 : 56(84) bytes of data.
64 bytes from 211.106.67.221: icmp_seq=0 ttl=248 time=2.6 ms
64 bytes from 211.106.67.221: icmp_seq=1 ttl=248 time=2.9 ms
64 bytes from 211.106.67.221: icmp_seq=2 ttl=248 time=2.2 ms

다음은 메세지 일부입니다 .

Jan 12 09:05:26 ASR_DB2 oracleORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_pmon_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_pmon_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_dbw0_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_lgwr_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_ckpt_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_smon_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_reco_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp0_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp1_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp2_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp3_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp4_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp5_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp6_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp7_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp8_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:05:26 ASR_DB2 ora_snp9_ORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:06:40 ASR_DB2 lsnrctl: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:01 ASR_DB2 tnslsnr: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:01 ASR_DB2 tnslsnr: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:18 ASR_DB2 PAM_pwdb[546]: (su) session opened for user root by oracle(uid=500)
Jan 12 09:07:46 ASR_DB2 cdrgend: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:46 ASR_DB2 oracleORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:46 ASR_DB2 oracleORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 cta3000: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 cta3000: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 oracleORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 last message repeated 3 times
Jan 12 09:07:49 ASR_DB2 cta3000_c: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 cta3000_c: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 oracleORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 oracleORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 cta3000_c: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 oracleORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 cta3000_c: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 oracleORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:49 ASR_DB2 last message repeated 2 times
Jan 12 09:07:50 ASR_DB2 cta3000_c: gethostby*.getanswer: asked for "ASR_DB2", got "realname"
Jan 12 09:07:50 ASR_DB2 oracleORCL: gethostby*.getanswer: asked for "ASR_DB2", got "realname"

사용 O/S Advanced Server 2.1 + Oracle 9i (R2)

질문1) realname이라는 놈이 무엇일까요 ?

질문2) routie and  211.106.67.221 reject로 막아도 될런지 알려 주십시요

질문3) 시스템 overhead때문에 일정기간을 두고 자꾸 서버가 다운되는데 좋은 모니터링 방법이 없을까요 ? 초보 리눅스 운영자가