Celestix MSA Security Appliances control internet access and protect clients from malicious traffic on the internet. 

With Celestix MSA Security Appliances, you can easily control and apply Internet access policies for your user populations, as well as help protect users from malicious Internet traffic. Flexible firewall policies allow for Web site blocking as well as content filtering, both to improve user productivity and to block inappropriate content. Celestix MSA Security Appliances also features built-in integration with Active Directory, enabling you to build custom access controls for different organizational roles and job levels. 

In addition, application filtering in Celestix MSA Security Appliances enables you to improve the reliability of your environment by protecting your desktops and servers from advanced attacks. For example, advanced HTTP filtering in Celestix MSA Security Appliances blocks the use of embedded applications, such as common peer-to-peer and instant messaging applications. Traffic filtering in Celestix MSA Security Appliances also thwarts many common forms of attack by preventing access to internal clients from the outside, checking inbound reply traffic for validity, and verifying that third-party add-ons contain no worms or viruses. 

Figure 1 illustrates how Celestix MSA Security Appliances and ISA Server 2004 control Internet access and help protect clients from malicious traffic on the Internet.