Outdated stateful inspection methods are no match for today's firewall-evasive attacks. SonicWALL TZ, PRO, NSA, and E-Class NSA appliances are engineered to reduce risk, cost and complexity by integrating state-of-the-art firewall, UTM, wireless and VPN technologies to deliver comprehensive protection and maximum performance.

• Sonicwall Deep Packet Inspection Firewall
  SonicWALL network security firewall solutions feature our patented high-speed Reassembly-free Deep Packet Inspection™ (RFDPI) to protect against internal and external attacks and application vulnerabilities. A cost-effective, object-oriented integrated suite, RFDPI is not limited by file size or concurrent traffic volumes. Utilizing ultra-high-speed multi-core architecture, SonicWALL RFDPI firewalls deliver industry-leading price/performance.
• Sonicwall Unified Threat Management (UTM)
  SonicWALL Unified Threat Management (UTM) solutions employ an expanding array of seamlessly integrated services featuring gateway anti-virus, anti-spyware, intrusion prevention, enforced desktop anti-virus, content filtering and application firewall. SonicWALL’s continuous real-time threat protection and dynamic signature updates, ensuring the strongest defense posture with minimal IT intervention.
• Wireless Networking
  SonicWALL® makes wireless networking secure, simple and affordable with the innovative SonicWALL® Clean Wireless Solution—the first total security solution that integrates 802.11n and 802.11a/b/g wireless management with best-in-class Unified Threat Management (UTM) security and application firewall to provide application based policy control. The SonicWALL Clean Wireless solution gives organizations, for the first time, the confidence that their wireless network is as secure and well managed as their wired network.
• Sonicwall Virtual Private Network (VPN) Solutions
  Featuring integrated IPSec and SSL VPN technologies, SonicWALL network security solutions deliver access to vital business resources for employees, distributed office sites, partners and contractors from anywhere. Combined with SonicWALL Secure Remote Access (SRA) solutions, SonicWALL network security solutions create a SonicWALL Clean VPN™, which continually monitors each connection to deliver instant and automatic protection against transmitted threats, ensuring VPN integrity.

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