Malicious attacks can penetrate stateful packet inspection firewalls. Securing today’s networks demands Unified Threat Management (UTM). SonicWALL's family of network security appliances combines robust UTM security services with high-speed deep packet inspection to provide small, mid-size and enterprise-class organisations the best protection possible. SonicWALL® TZ, PRO, NSA and E-Class NSA appliances are engineered to reduce cost, risk and complexity by integrating automated and dynamic security capabilities for comprehensive protection and maximum performance.

• ADVANCED NETWORK SECURITY SERVICES
• SECURE DISTRIBUTED NETWORKING AND REMOTE WORKERS
• DEEP PACKET INSPECTION
• ENTERPRISE CLASS MULTI-SERVICE SECURITY PLATFORM
• SECURITY PLATFORM FOR HOME, SMALL AND REMOTE/BRANCH OFFICES
• SIMPLE TO USE, SIMPLE TO MANAGE

More information: http://www.sonicwall.com/uk/UTM_Firewall_VPN.html