Zy WALL 2 Plus supports IPSec VPN suitable for remote site to central server deployment & home to office or office to home deployments. Data encryption over the Internet ensures secure transmission between the two sites eliminating the need for expensive leased lines, & enabling global interconnectivity at a minimal expense. With the Redundant IPSec VPN feature, the Zy WALL 2 Plus can establish back-up tunnels to main sites. The Zy NOS ICSA Firewall certified Zy WALL 2 Plus provides robust firewall protection, based on Stateful Packet Inspection (SPI) & Denial of Service (Dos) technology. The Zy WALL 2 Plus provides the first line of defense against hackers, & other malicious threats. Blue Coat subscription services assist in keeping spyware, malware & phishing exploits from attacking your PCs, & help protect business & family from illegal & unwanted surfing. Zy WALL 2 Plus maximizes bandwidth utilization based on IP addresses and/or application types. Designed to ensure critical applications, services & specified users have the right amount of bandwidth when required. Zy WALL 2 Plus increases reliability by supporting Fail-Over & Fail-Back technologies. User Selected back-up ISDN or Analog modem connections automatically switch traffic back to the WAN Port, when the primary connection is re-established. The Zy WALL 2 Plus backup feature ensures access to the net while decreasing the likelihood of potential down times & association losses.