또 내부에서 ssh로그인시도하네요.해결바랍니다.
Last failed login: Sat May 12 09:12:43 UTC 2018 from 192.168.254.1 on ssh:notty
There were 336 failed login attempts since the last successful login.
Last login: Wed May 9 23:07:22 2018 from 117.111.174.(숨김)
117.111.174.(숨김)은 제 아이피입니다.