The IP 80.93.23.56 has just been banned by Fail2Ban after 19 attempts against SSH. Latest lines containing IP:80.93.23.56 in /var/log/syslog/sshd.log Aug 12 02:18:37 ftlogin2 sshd[4088]: Failed keyboard-interactive/pam for invalid user admin from 80.93.23.56 port 33941 ssh2 Aug 12 02:18:47 ftlogin2 sshd[4095]: reverse mapping checking getaddrinfo for ip-23-56.dnsireland.com [80.93.23.56] failed - POSSIBLE BREAK-IN ATTEMPT! Aug 12 02:18:47 ftlogin2 sshd[4095]: Invalid user admin from 80.93.23.56 Aug 12 02:18:47 ftlogin2 sshd[4098]: Postponed keyboard-interactive for invalid user admin from 80.93.23.56 port 34289 ssh2 Aug 12 02:18:48 ftlogin2 sshd[4095]: error: PAM: User not known to the underlying authentication module for illegal user admin from 80.93.23.56 Aug 12 02:18:48 ftlogin2 sshd[4095]: Failed keyboard-interactive/pam for invalid user admin from 80.93.23.56 port 34289 ssh2 Aug 12 02:18:48 ftlogin2 sshd[4098]: Postponed keyboard-interactive for invalid user admin from 80.93.23.56 port 34289 ssh2 Aug 12 02:18:49 ftlogin2 sshd[4095]: error: PAM: User not known to the underlying authentication module for illegal user admin from 80.93.23.56 Aug 12 02:18:49 ftlogin2 sshd[4095]: Failed keyboard-interactive/pam for invalid user admin from 80.93.23.56 port 34289 ssh2 Aug 12 02:18:49 ftlogin2 sshd[4098]: Postponed keyboard-interactive for invalid user admin from 80.93.23.56 port 34289 ssh2 - Fail2ban on