Fail2ban monitors log files and temporarily orpersistently bans failure-prone addresses byupdating existing firewall rules. The softwareallows easy specification of different actions tobe taken such as to ban an IP address usingiptables or hostsdeny rules, or simply to send anotification email. It supports many services, andconfiguration can be easily extended formonitoring any other ASCII file. All filters andactions are given in the configuration files, thusfail2ban can be adopted to be used with a varietyof files and firewalls.