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 10 12:49:01 ftlogin2 sshd[3499]: Failed keyboard-interactive/pam for invalid user admin from 198.57.175.112 port 58880 ssh2 Aug 10 12:49:11 ftlogin2 sshd[3507]: reverse mapping checking getaddrinfo for 198-57-175-112.unifiedlayer.com [198.57.175.112] failed - POSSIBLE BREAK-IN ATTEMPT! Aug 10 12:49:11 ftlogin2 sshd[3507]: Invalid user admin from 198.57.175.112 Aug 10 12:49:11 ftlogin2 sshd[3510]: Postponed keyboard-interactive for invalid user admin from 198.57.175.112 port 59053 ssh2 Aug 10 12:49:12 ftlogin2 sshd[3507]: error: PAM: User not known to the underlying authentication module for illegal user admin from 198.57.175.112 Aug 10 12:49:12 ftlogin2 sshd[3507]: Failed keyboard-interactive/pam for invalid user admin from 198.57.175.112 port 59053 ssh2 Aug 10 12:49:12 ftlogin2 sshd[3510]: Postponed keyboard-interactive for invalid user admin from 198.57.175.112 port 59053 ssh2 Aug 10 12:49:13 ftlogin2 sshd[3507]: error: PAM: User not known to the underlying authentication module for illegal user admin from 198.57.175.112 Aug 10 12:49:13 ftlogin2 sshd[3507]: Failed keyboard-interactive/pam for invalid user admin from 198.57.175.112 port 59053 ssh2 Aug 10 12:49:13 ftlogin2 sshd[3510]: Postponed keyboard-interactive for invalid user admin from 198.57.175.112 port 59053 ssh2 - Fail2ban on