Firewall technologies are the oldest and most fundamental network security technology. As the primary method for defining and defending a network perimeter, firewall technology is highly ubiquitous but also very mature. Vendors have been integrating IPsec VPN functionality into their firewall products for many years now, and firewalls can include features such as deep packet inspection. Firewalls have relied on stateful packet inspection for many years now to filter network traffic, but vendors are beginning to offer new methodologies, such as filtering based on application or user identification. This study will provide data and analysis pertinent to the world firewall products market for 2009 and forecasts for 2006 to 2016.