If you are behind a firewall (today often known marketed as IPS, NGFW or UTM) which claims to protect you from malware you might want to verify these claims. HTTP Evader provides you with a way to automatically test how your firewall deals with situations where the malware hides in rare or invalid responses from the web server. Lots of highly praised firewalls fail to detect malware in this cases, which means they fail to protect you properly.