Network  security appliances are evolving to serve the increasing requirement for defense against more complex threats and accommodate the dynamic nature of enterprise technology. The standard L2/L3 firewall is no sufficient. Vendors are adding more comprehensive traffic inspection technology into the appliances.

The more  services that get integrated and the more packet inspection that is implemented, the bigger the challenge is for vendors to provide a solution. Security  appliances vendors need processors that provide the performance to implement  complex traffic inspection and the flexibility to accommodate the dynamic  nature of security and ever-changing threats.

Security appliances can offer a chance to save money and avoid installation headaches, but are they a good fit for you business? We analyze some of the good, the bad, and the troubling aspects of and network protection, 
and how buying an appliance might make your day.You’ve heard all the buzzwords spam, phishing, spyware, botnets -– but what are you actually doing about them? Are the security measures  you have in place good enough, or have you been wasting your money?

One option is a security appliance, designed to simplify the process of securing your network. Some appliances are single-purpose, such as a firewall, made up of hardware,software and middleware. Others are multifunction and include, for example, a firewall, anti-virus protection and intrusion detection


Article source:http://www.tilera.com/solutions/networking/network_security_appliances
Article source:http://www.informationsecuritycanada.com/press/device_and_appliance_security.html