What to Do When a Security Monitoring Source Stops Sending Logs

A security dashboard that suddenly shows fewer alerts can create false confidence if a log source stopped reporting. An agent may have failed, an API credential may have expired, a network route may have changed, or an ingestion limit may have been reached. Monitoring the health of telemetry is part of monitoring security.

Confirm the gap

Compare the most recent event time with the source's expected reporting interval. Check endpoint agent status, collector queues, API errors, network paths, and ingestion quotas. Identify whether the gap affects one asset, one log type, or an entire environment.

• Alert when critical sources miss their expected heartbeat.
• Keep a map of source owner, collection path, and expected volume.
• Retain local logs until central collection is confirmed.
• Review access or configuration changes near the start of the gap.
• After restoration, determine whether buffered events can be replayed.

Do not close related detections simply because no new events arrived. Informatix Systems lists security operations related services. A review can assess log coverage, source health alerts, and response procedures. Contact Informatix Systems if security telemetry has gone quiet unexpectedly.