To support what instronics said...

The software has the ability to instantly and dynamically 'trace' the IP source address - no matter how well masked - of the network attack/infection and respond by launching either a Domain Name or Mail Server flood attack in the direction of the attacker.


The freeware package - PAYBACK v1.0 - is available from www.backfiresecurity.co.uk in both PC and Mac formats.


I got error when I open the site.

*** This account has exceeded it's bandwidth quota and has been temporarily disabled***

Try visit the site quite sometimes.