本日の出来事。

Sep 3 02:57:34 mylinuxpc sshd(pam_unix)[20621]: check pass; user unknown
Sep 3 02:57:34 mylinuxpc sshd(pam_unix)[20621]: authentication failure; logname= uid=0 e
uid=0 tty=NODEVssh ruser= rhost=220.64.223.183
Sep 3 02:57:46 mylinuxpc sshd(pam_unix)[20629]: check pass; user unknown
Sep 3 02:57:46 mylinuxpc sshd(pam_unix)[20629]: authentication failure; logname= uid=0 e
uid=0 tty=NODEVssh ruser= rhost=220.64.223.183
Sep 3 02:57:49 mylinuxpc sshd(pam_unix)[20631]: authentication failure; logname= uid=0 e
uid=0 tty=NODEVssh ruser= rhost=220.64.223.183 user=root
Sep 3 02:57:52 mylinuxpc sshd(pam_unix)[20633]: authentication failure; logname= uid=0 e
uid=0 tty=NODEVssh ruser= rhost=220.64.223.183 user=root
Sep 3 02:57:55 mylinuxpc sshd(pam_unix)[20635]: authentication failure; logname= uid=0 e
uid=0 tty=NODEVssh ruser= rhost=220.64.223.183 user=root
Sep 3 02:57:58 mylinuxpc sshd(pam_unix)[20637]: check pass; user unknown
Sep 3 02:57:58 mylinuxpc sshd(pam_unix)[20637]: authentication failure; logname= uid=0 e
uid=0 tty=NODEVssh ruser= rhost=220.64.223.183


IPは本物。時間とホスト名は偽物。
あと、長いので少し端折った。