Symantec Protection Agent Symantec Sygate Enterprise Protection only. Software component that enforces rule-based security on devices, whether remote or behind a corporate firewall, using security policies defined on the Symantec Policy Manager. Also referred to as the Agent in this documentation. The Agent must be installed on every device before it can connect to the enterprise network. The Agent can detect, identify, and block known Trojans and Denial of Service attacks, and also protects against new or unknown attacks by blocking applications and traffic that violates a defined set of security policies. Port scans are also detected and logged to alert users and system administrators of potential attacks, while maintaining system security.