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Symantec ITA Agent
Port 5051 is primarily used by Symantec Intruder Alert's ITA Agent, a component within Symantec’s intrusion detection system designed to collect and communicate real-time security event data to centralized management consoles..
Symantec Intruder Alert (ITA) is a sophisticated host-based intrusion detection system that monitors critical operating system files, system activity, and user actions for suspicious behavior. The ITA Agent installed on client machines sends alerts and security event information back to the ITA Manager or console for analysis and response.
Port 5051 is designated for communication between the ITA Agent and the management console. It typically uses a TCP connection that facilitates reliable delivery of detailed, real-time monitoring data. This channel allows administrators to receive alerts, push configurations, and gather audit information across the monitored environment.
While Symantec Intruder Alert has been officially discontinued, many legacy systems retain its use. Proper configuration of access rules on this port is critical to maintain the integrity of intrusion alerts and continued functioning of legacy ITA installations.