안녕하세요?

이런 메일이 왔는데 뭔말인지요?또 어떻게 조사하여,대처방안은 어떻게 해야 하는지요??

고수님의 고견을 듣습니다.

 

Dear Sir/Madam,

We have detected abuse from the IP address 210.93.xxx.xxx, which according to a whois lookup is on your network. We would appreciate if you would investigate and take action as appropriate.

Log lines are given below, but please ask if you require any further information.

(If you are not the correct person to contact about this please accept our apologies - your e-mail address was extracted from the whois record by an automated process. This mail was generated by Fail2Ban.)

Note: Local timezone is -0800 (PST)
Feb 14 23:31:59 ubuntunas sshd[25749]: Did not receive identification string from 210.93.xxx.xxx
Feb 14 23:34:20 ubuntunas sshd[25803]: Invalid user adi from 210.93.xxx.xxx
Feb 14 23:34:27 ubuntunas sshd[25805]: Invalid user bogdan from 210.93.xxx.xxx
Feb 14 23:34:33 ubuntunas sshd[25807]: Invalid user ttstts from 210.93.xxx.xxx
Feb 14 23:34:40 ubuntunas sshd[25809]: Invalid user ema from 210.93.xxx.xxx
Feb 14 23:35:47 ubuntunas sshd[26672]: Invalid user trinity from 210.93.xxx.xxx

Feb 14 23:36:07 ubuntunas sshd[26773]: Invalid user pix from 210.93.xxx.xxx