The Cisco SA 520 Security Appliance is a simple to install and use, all-in-one security solution designed specifically for businesses with less than 100 employees. Featuring four high-speed LAN ports, it combines secure Internet, site-to-site, and remote connectivity with firewall, email and web security capabilities to protect a small business while improving employee productivity. It works seamlessly with other Cisco Small Business Pro products to deliver powerful, integrated solutions to unique small business problems and with 3-year peace of mind Cisco Small Business Pro Service helps to get the most investment value.