The IP 198.57.175.112 has just been banned by Fail2Ban after 19 attempts against SSH. Latest lines containing IP:198.57.175.112 in /var/log/syslog/sshd.log Aug 12 10:11:45 ftlogin2 sshd[6408]: Failed keyboard-interactive/pam for invalid user admin from 198.57.175.112 port 48512 ssh2 Aug 12 10:11:54 ftlogin2 sshd[6549]: reverse mapping checking getaddrinfo for 198-57-175-112.unifiedlayer.com [198.57.175.112] failed - POSSIBLE BREAK-IN ATTEMPT! Aug 12 10:11:54 ftlogin2 sshd[6549]: Invalid user admin from 198.57.175.112 Aug 12 10:11:54 ftlogin2 sshd[6552]: Postponed keyboard-interactive for invalid user admin from 198.57.175.112 port 48692 ssh2 Aug 12 10:11:55 ftlogin2 sshd[6549]: error: PAM: User not known to the underlying authentication module for illegal user admin from 198.57.175.112 Aug 12 10:11:55 ftlogin2 sshd[6549]: Failed keyboard-interactive/pam for invalid user admin from 198.57.175.112 port 48692 ssh2 Aug 12 10:11:55 ftlogin2 sshd[6552]: Postponed keyboard-interactive for invalid user admin from 198.57.175.112 port 48692 ssh2 Aug 12 10:11:56 ftlogin2 sshd[6549]: error: PAM: User not known to the underlying authentication module for illegal user admin from 198.57.175.112 Aug 12 10:11:56 ftlogin2 sshd[6549]: Failed keyboard-interactive/pam for invalid user admin from 198.57.175.112 port 48692 ssh2 Aug 12 10:11:56 ftlogin2 sshd[6552]: Postponed keyboard-interactive for invalid user admin from 198.57.175.112 port 48692 ssh2 - Fail2ban on