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Full Version: Fail2Ban
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Fail2ban scans log files (e.g. /var/log/apache/error_log) and bans IPs that show the malicious signs -- too many password failures, seeking for exploits, etc. Generally Fail2Ban is then used to update firewall rules to reject the IP addresses for a specified amount of time, although any arbitrary other action (e.g. sending an email) could also be configured. Out of the box Fail2Ban comes with filters for various services (apache, courier, ssh, etc).

Fail2Ban is able to reduce the rate of incorrect authentications attempts however it cannot eliminate the risk that weak authentication presents. Configure services to use only two factor or public/private authentication mechanisms if you really want to protect services.


More about Fail2ban
Fail 2ban is an  intrusion prevention software and it is used to prevent unknown  entries.It is written python programming language.It is able to run on systems that have an interface to a packet-control system or firewall installed locally.The Thesis writing service help me to get more ideas on  this topic.Fail2ban operates by monitoring log files.It is high quality software.