로그파일 좀 봐주세요.

안녕하십니까?

오늘과내일의 홍석범입니다.
아래와 관련된 내용은 게시판에서 ssh 로 검색해 보시면
해결책등 동일한 답을 찾으실 수 있습니다....
단순 무작위대입법을 이용한 공격 기법이니 크게 걱정하지 않으셔도 됩니다.

감사합니다.

이성안 님의 글

이거 문제 많은거죠? ㅠ.ㅠ

Sep 10 08:53:26 ns sshd[2903]: error: Could not get shadow information for NOUSER
Sep 10 08:53:26 ns sshd[2903]: Failed password for illegal user jaap from 218.67.240.33 port 34867 ssh2
Sep 10 08:53:27 ns sshd[2905]: Illegal user www from 218.67.240.33
Sep 10 08:53:27 ns sshd[2905]: error: Could not get shadow information for NOUSER
Sep 10 08:53:27 ns sshd[2905]: Failed password for illegal user www from 218.67.240.33 port 34911 ssh2
Sep 10 08:53:28 ns sshd[2907]: Illegal user andre from 218.67.240.33
Sep 10 08:53:28 ns sshd[2907]: error: Could not get shadow information for NOUSER
Sep 10 08:53:28 ns sshd[2907]: Failed password for illegal user andre from 218.67.240.33 port 34957 ssh2
Sep 10 08:53:29 ns sshd[2909]: Illegal user bjorn from 218.67.240.33
Sep 10 08:53:29 ns sshd[2909]: error: Could not get shadow information for NOUSER
Sep 10 08:53:29 ns sshd[2909]: Failed password for illegal user bjorn from 218.67.240.33 port 35006 ssh2
Sep 10 08:53:29 ns sshd[2911]: Failed password for ftp from 218.67.240.33 port 35045 ssh2
Sep 10 08:53:30 ns sshd[2913]: Illegal user jonas from 218.67.240.33
Sep 10 08:53:30 ns sshd[2913]: error: Could not get shadow information for NOUSER
Sep 10 08:53:30 ns sshd[2913]: Failed password for illegal user jonas from 218.67.240.33 port 35091 ssh2
Sep 10 08:53:31 ns sshd[2915]: Illegal user nisse from 218.67.240.33
Sep 10 08:53:31 ns sshd[2915]: error: Could not get shadow information for NOUSER
Sep 10 08:53:31 ns sshd[2915]: Failed password for illegal user nisse from 218.67.240.33 port 35132 ssh2
Sep 10 08:53:31 ns sshd[2917]: Illegal user peter from 218.67.240.33
Sep 10 08:53:31 ns sshd[2917]: error: Could not get shadow information for NOUSER
Sep 10 08:53:31 ns sshd[2917]: Failed password for illegal user peter from 218.67.240.33 port 35192 ssh2
Sep 10 08:53:32 ns sshd[2919]: Illegal user admin from 218.67.240.33
Sep 10 08:53:32 ns sshd[2919]: error: Could not get shadow information for NOUSER
Sep 10 08:53:32 ns sshd[2919]: Failed password for illegal user admin from 218.67.240.33 port 35234 ssh2
Sep 10 08:53:33 ns sshd[2921]: Illegal user andreas from 218.67.240.33
Sep 10 08:53:33 ns sshd[2921]: error: Could not get shadow information for NOUSER
Sep 10 08:53:33 ns sshd[2921]: Failed password for illegal user andreas from 218.67.240.33 port 35278 ssh2
Sep 10 08:53:34 ns sshd[2923]: Illegal user ebner from 218.67.240.33
Sep 10 08:53:34 ns sshd[2923]: error: Could not get shadow information for NOUSER
Sep 10 08:53:34 ns sshd[2923]: Failed password for illegal user ebner from 218.67.240.33 port 35319 ssh2
Sep 10 08:53:35 ns sshd[2925]: Illegal user helmut from 218.67.240.33
Sep 10 08:53:35 ns sshd[2925]: error: Could not get shadow information for NOUSER
Sep 10 08:53:35 ns sshd[2925]: Failed password for illegal user helmut from 218.67.240.33 port 35359 ssh2
Sep 10 08:53:38 ns sshd[2927]: Illegal user horst from 218.67.240.33
Sep 10 08:53:38 ns sshd[2927]: error: Could not get shadow information for NOUSER
Sep 10 08:53:38 ns sshd[2927]: Failed password for illegal user horst from 218.67.240.33 port 35419 ssh2
Sep 10 08:53:39 ns sshd[2929]: Illegal user htttp from 218.67.240.33
Sep 10 08:53:39 ns sshd[2929]: error: Could not get shadow information for NOUSER
Sep 10 08:53:39 ns sshd[2929]: Failed password for illegal user htttp from 218.67.240.33 port 35655 ssh2
Sep 10 08:53:40 ns sshd[2931]: Illegal user kkd from 218.67.240.33
Sep 10 08:53:40 ns sshd[2931]: error: Could not get shadow information for NOUSER
Sep 10 08:53:40 ns sshd[2931]: Failed password for illegal user kkd from 218.67.240.33 port 35701 ssh2
Sep 10 08:53:41 ns sshd[2933]: Illegal user office from 218.67.240.33
Sep 10 08:53:41 ns sshd[2933]: error: Could not get shadow information for NOUSER
Sep 10 08:53:41 ns sshd[2933]: Failed password for illegal user office from 218.67.240.33 port 35753 ssh2
Sep 10 08:53:41 ns sshd[2935]: Illegal user technik from 218.67.240.33
Sep 10 08:53:41 ns sshd[2935]: error: Could not get shadow information for NOUSER
Sep 10 08:53:41 ns sshd[2935]: Failed password for illegal user technik from 218.67.240.33 port 35796 ssh2
Sep 10 08:53:42 ns sshd[2937]: Illegal user david from 218.67.240.33