Проглядел лог аутентификации.
Invalid user www from 180.29.146.216
Nov 27 10:28:26 debian sshd[3513]: pam_unix(sshd:auth): check pass; user unknown
Nov 27 10:28:26 debian sshd[3513]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=p11216-ipngn501hiraide.tochigi.oc$
Nov 27 10:28:28 debian sshd[3513]: Failed password for invalid user www from 180.29.146.216 port 46680 ssh2
Nov 27 10:28:31 debian sshd[3516]: Invalid user wwwrun from 180.29.146.216
Nov 27 10:28:31 debian sshd[3516]: pam_unix(sshd:auth): check pass; user unknown
Nov 27 10:28:31 debian sshd[3516]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=p11216-ipngn501hiraide.tochigi.oc$
Nov 27 10:28:33 debian sshd[3516]: Failed password for invalid user wwwrun from 180.29.146.216 port 47185 ssh2
Nov 27 10:28:37 debian sshd[3518]: Invalid user adam from 180.29.146.216
Nov 27 10:28:37 debian sshd[3518]: pam_unix(sshd:auth): check pass; user unknown
Nov 27 10:28:37 debian sshd[3518]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=p11216-ipngn501hiraide.tochigi.oc$
Nov 27 10:28:39 debian sshd[3518]: Failed password for invalid user adam from 180.29.146.216 port 47678 ssh2