McAfee and Symantec each say their endpoint protection platforms support Windows, Mac and Linux systems. The products are designed to provide security defenses against spyware, Trojans, worms and other malicious programs. McAfee SiteAdvisor Enterprise Plus can be configured by administrators to block access to certain websites. McAfee provides behavioral protection to prevent buffer overflow and zero-day attacks. The company also is working closely with parent company Intel on new hardware-based security defenses. Symantec Protection Suite Enterprise Edition uses a Web gateway security strategy to protect against malware, spyware, botnets and viruses. Symantec provides behavioral protection through its SONAR technology for stopping zero-day attacks.