Fair Log-in Business Edition for Jooma! 2.5
Full business license. Extended support.
Current version: 1.2.0
Purchase includes one (1) year free updates.

A log-in gate keeper plug-in.

This plug-in progressively delays log-in attempts to both the front- and back-end of your website. The progression speed and type can be configured.

Automated brute force log-in attempts are therefore made increasingly inefficient and are eventually given up.
This Business Edition includes the option to block and log offending IP addresses during a configurable length of time or permanently. The Business Edition can also ban IPs and even countries from logging in all together.

You can use our free Fair Log-in Monitor module alongside this plug-in, as a diagnostic tool that displays the number of back- and front-end log-in attempts that are currently being made. The Monitor can be downloaded free of charge and can help you decide what level of protection your website requires.

Install or upgrade via Joomla! backend.
Configuration overview: see here.

Requirements: Joomla! 2.5.27 or later with PHP 5.3 or later

Basic install, upgrade and setup instructions are in the documentation that comes with the download package.

Language: English.

License: Full business license. License terms are here.
Support: Extended support. Support terms are here.

Discount and refund policy: see here.

You may want to try the freeware edition first. The freeware edition does not expire, but has limited options and is meant for evaluation only.