The NSA NSA 3500 Security Appliance applies next-generation Unified Threat Management (UTM) against a comprehensive array of attacks, combining intrusion prevention, anti-virus and anti-spyware with the application-level control of SonicWALL Application Firewall. With advanced routing, stateful high-availability and high-speed VPN technology, the NSA 3500 adds security, reliability, functionality and productivity to branch offices, central sites and distributed mid-enterprise networks, ...