Since spammers were way too much active on this wiki, user account creation has been disabled. Please, ask on the mailing-lists if you require a new user account. Thank you for your understanding and sorry about that.
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 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, or ejecting CD-ROM tray) could also be configured. Out of the box Fail2Ban comes with filters for various services (apache, curier, ssh, etc).
0.8.11 is out. All filter have been tightened due to previous Apache DoS vulnerability. Numerous filters have been fixed to work on more versions of their related programs. see Changelog
2013/06/12 0.8.10 is out. Addresses possible DoS in apache- filters + adds some enhancements. see Changelog.
2013/05/13 0.8.9 is out. Lots of fixes (e.g. pyinotify) and enhancements (e.g. conf.d/*.conf support).
To experiment with this wiki try Sandbox. See the User's Guide for usage and configuration help.