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System Observability: Logging, Metrics & Tracing (ELK + OpenTelemetry) · Lesson

Using Observability for Security

Learn how to detect security threats and anomalies by analyzing observability data. Understand how to set up alerts for suspicious activities.

Observability for Security

Welcome! In this lesson, we'll explore how observability — our ability to understand a system from its external outputs — is a powerful tool for enhancing security.

It's not just for performance! Logs, metrics, and traces provide crucial insights into system behavior, helping us detect and respond to security threats.

Logs: Your Security Audit Trail

Logs are often the first line of defense. They record events, giving us a detailed history of what happened in a system. For security, we focus on specific types of log entries:

  • Authentication: Successful and failed login attempts.
  • Authorization: Changes to user permissions or access.
  • Access: Attempts to access sensitive files or data.
  • System Changes: Configuration updates or software installations.
  • Network Events: Connection attempts, firewall blocks.

Example log entry:

{"timestamp": "2023-10-27T10:00:00Z", "event_type": "login_failed", "user": "admin", "source_ip": "192.168.1.10", "reason": "invalid_password"}

All lessons in this course

  1. Using Observability for Security
  2. Performance Monitoring and Tuning
  3. Cost Optimization of Observability
  4. Audit Logging and Compliance
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