A single file speed bump to bots and malicious traffic
Firewall is a companion project intended to function as a barrier to abusive requests and malicious bots.
Firewall runs before any other application code. Set the SKIP_LOCAL constant to be defined in your code to prevent this file from being called on its own.
define( 'SKIP_LOCAL', 0 );
require( 'firewall.php' );
This setting enables checking for private IP ranges. Use define( 'SKIP_LOCAL', 1 ); instead to skip checking private ranges if your site is hosted on a private IP range or over Tor.
Firewall will keep track of blocked traffic in the firewall.db file in a writable directory, if the FIREWALL_DB_LOG setting is 1 or you can keep it off by leaving it as 0.
A lot of this was inspired by the Bad Behavior package but does not use the same code.