접속시도한거 맞죠?

로그를 확인하니까 이렇게 나오는데 제생각에는 누가 접속시도를 한것 같은데맞죠?

Aug 15 07:06:22 ns sshd[29200]: Failed password for root from 211.227.249.117 port 38801 ssh2
Aug 15 07:06:26 ns sshd[29203]: Failed password for root from 211.227.249.117 port 38907 ssh2
Aug 15 07:06:30 ns sshd[29205]: Failed password for root from 211.227.249.117 port 39006 ssh2
Aug 15 07:06:33 ns sshd[29208]: Failed password for root from 211.227.249.117 port 39100 ssh2
Aug 15 07:06:36 ns sshd[29211]: Failed password for root from 211.227.249.117 port 39204 ssh2
Aug 15 07:06:39 ns sshd[29213]: Failed password for root from 211.227.249.117 port 39309 ssh2
Aug 15 07:06:42 ns sshd[29215]: Failed password for root from 211.227.249.117 port 39418 ssh2
Aug 15 07:06:45 ns sshd[29217]: Failed password for root from 211.227.249.117 port 39522 ssh2
Aug 15 07:06:48 ns sshd[29220]: Failed password for root from 211.227.249.117 port 39619 ssh2
Aug 15 07:06:51 ns sshd[29222]: Failed password for root from 211.227.249.117 port 39717 ssh2
Aug 15 07:06:54 ns sshd[29224]: Failed password for root from 211.227.249.117 port 39826 ssh2
Aug 15 07:06:57 ns sshd[29226]: Failed password for root from 211.227.249.117 port 39930 ssh2
Aug 15 07:07:01 ns sshd[29229]: Failed password for root from 211.227.249.117 port 40032 ssh2
Aug 15 07:07:07 ns sshd[29232]: Failed password for root from 211.227.249.117 port 40163 ssh2
Aug 15 07:07:10 ns sshd[29235]: Failed password for root from 211.227.249.117 port 40388 ssh2
Aug 15 07:07:13 ns sshd[29237]: Failed password for root from 211.227.249.117 port 40498 ssh2
Aug 15 07:07:17 ns sshd[29240]: Failed password for root from 211.227.249.117 port 40612 ssh2
Aug 15 07:07:20 ns sshd[29243]: Failed password for root from 211.227.249.117 port 40734 ssh2
Aug 15 07:07:23 ns sshd[29245]: Failed password for root from 211.227.249.117 port 40855 ssh2
Aug 15 07:07:26 ns sshd[29247]: Failed password for root from 211.227.249.117 port 40996 ssh2
Aug 15 07:07:29 ns sshd[29249]: Failed password for root from 211.227.249.117 port 41119 ssh2
Aug 15 07:07:32 ns sshd[29253]: Failed password for root from 211.227.249.117 port 41266 ssh2
Aug 15 07:07:35 ns sshd[29255]: Failed password for root from 211.227.249.117 port 41372 ssh2
Aug 15 07:07:41 ns sshd[29259]: Failed password for root from 211.227.249.117 port 41485 ssh2
Aug 15 07:09:13 ns sshd[29361]: Illegal user backup from 211.227.249.117
Aug 15 07:09:16 ns sshd[29361]: Failed password for illegal user backup from 211.227.249.117 port 45259 ssh2
Aug 15 07:09:17 ns sshd[29363]: Illegal user id from 211.227.249.117
Aug 15 07:09:19 ns sshd[29363]: Failed password for illegal user id from 211.227.249.117 port 45392 ssh2
Aug 15 07:09:20 ns sshd[29367]: Illegal user sgi from 211.227.249.117
Aug 15 07:09:22 ns sshd[29367]: Failed password for illegal user sgi from 211.227.249.117 port 45529 ssh2
Aug 15 07:09:23 ns sshd[29384]: Illegal user postgres from 211.227.249.117
Aug 15 07:09:26 ns sshd[29384]: Failed password for illegal user postgres from 211.227.249.117 port 45672 ssh2
Aug 15 07:09:27 ns sshd[29389]: Illegal user flowers from 211.227.249.117
Aug 15 07:09:29 ns sshd[29389]: Failed password for illegal user flowers from 211.227.249.117 port 45806 ssh2
Aug 15 07:09:30 ns sshd[29395]: Illegal user linux from 211.227.249.117
Aug 15 07:09:32 ns sshd[29395]: Failed password for illegal user linux from 211.227.249.117 port 45935 ssh2
Aug 15 07:09:33 ns sshd[29397]: Illegal user internet from 211.227.249.117
Aug 15 07:09:36 ns sshd[29397]: Failed password for illegal user internet from 211.227.249.117 port 46093 ssh2
Aug 15 07:09:36 ns sshd[29400]: Illegal user server from 211.227.249.117
Aug 15 07:09:39 ns sshd[29400]: Failed password for illegal user server from 211.227.249.117 port 46248 ssh2
Aug 15 07:09:42 ns sshd[29405]: Illegal user nokia from 211.227.249.117
Aug 15 07:09:45 ns sshd[29405]: Failed password for illegal user nokia from 211.227.249.117 port 46389 ssh2
Aug 15 07:09:45 ns sshd[29408]: Illegal user bash from 211.227.249.117
Aug 15 07:09:48 ns sshd[29408]: Failed password for illegal user bash from 211.227.249.117 port 46661 ssh2
Aug 15 07:09:48 ns sshd[29410]: Illegal user work from 211.227.249.117
Aug 15 07:09:51 ns sshd[29410]: Failed password for illegal user work from 211.227.249.117 port 46786 ssh2
Aug 15 07:09:54 ns sshd[29412]: Failed password for mysql from 211.227.249.117 port 46911 ssh2