Traditionally, system administrators lock down host computers through a network firewall in order to ensure network security. While a typical network firewall can help restrict traffic to HTTP and HTTPS, as this traffic can contain command exploits leveraging vulnerabilities in the web application itself. These exploits can result in data leakage, site defacement and other attacks by hackers that compromise both the privacy and integrity of vital data. Businesses of all sizes that operate their own web applications should ensure that their web sites are protected against application vulnerabilities.