What is the default syslog port that QRadar listens on?

The default syslog port that QRadar listens on is 514. This port is used for receiving syslog messages, which are standard for sending event logs from various devices to a centralized logging server, like QRadar. The choice of port 514 follows the convention established by the IETF (Internet Engineering Task Force) for syslog, allowing devices to send their logs to the SIEM efficiently.

Typically, syslog operates over the User Datagram Protocol (UDP), but it can also work over Transmission Control Protocol (TCP) as needed. Many security devices and operating systems are pre-configured to send their logs to this port, making it crucial for QRadar's ability to collect, analyze, and respond to security events. By listening on this default port, QRadar ensures that it can seamlessly integrate with a wide range of data sources without requiring extensive reconfiguration from end users or device managers.

In the context of the other options, while ports like 22, 636, and 6514 are associated with different services (SSH, LDAP over SSL, and secure syslog via TLS, respectively), they do not serve the primary purpose of receiving standard syslog messages in QRadar. Thus, the significance of port 514 as the default