The company provides network security monitoring, detection, and response software and services that are used to protect networks, servers, and desktops. Its products protect and respond to intrusions, assess vulnerabilities, collect and analyze data, and provide centralized security management. The company also offers a growing portfolio of managed security services, including security assessment, intrusion detection, firewalls, virtual private networks (VPNs), and virus filtering. A business unit of IBM Global Services, the company was acquired by Big Blue for $1.3 billion in 2006.