The plugin, developed by ProWeb, can also be utilized for blocking spam based on IP blacklisting.
Starting with version 2.0 of the security app, some new features have been implemented. These include variables whitelisting functions that help in avoiding false alerts; email alerts; and IP blacklisting, whitelisting and monitoring.
Webmasters can also manage rule sets depending on their websites’ requirements.
Download OSE Firewall
Note. Before installing and utilizing the plugin, create a database backup, since the plugin modifies some of the WordPress database tables.