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Alerts

Effective security monitoring depends on configuring alerts ahead of time so that potential attacks or system compromises trigger timely investigation. Key sources include antivirus, firewalls, EDR, IDS/IPS, and SIEM systems.

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About this video

Monitoring and alerting form the backbone of a responsive security operation, giving teams the visibility needed to detect and investigate potential threats in real time. When an alert fires — whether from a sudden system failure or an anomalous network event — it serves as an early indicator that something may be wrong, prompting further investigation to determine whether an attack or compromise has occurred. The critical factor is that these systems must be configured before an incident happens, ensuring the infrastructure is already in place to capture meaningful signals when they matter most. Common alert sources include antivirus and anti-malware tools, firewalls, endpoint detection and response (EDR) platforms, intrusion detection systems (IDS), intrusion prevention systems (IPS), and security information and event management (SIEM) solutions. Each of these technologies monitors different layers of the environment and contributes its own telemetry to the overall security picture. Alert tuning is an ongoing process that balances sensitivity against noise — the goal is to filter out low-priority events while ensuring that high-severity conditions reliably trigger a response. A well-tuned alerting strategy reduces fatigue, improves response times, and helps security professionals focus their attention where it counts.

What you'll learn

What's covered

Monitoring & Alerting in IT

Key terms

Antivirus
Software designed to detect, prevent, and remove malicious software from a system.
Firewall
A network security device that monitors and controls incoming and outgoing traffic based on predefined security rules.
Endpoint Detection and Response
EDR
A security solution that continuously monitors endpoint devices to detect, investigate, and respond to threats.
Intrusion Detection System
IDS
A system that monitors network or system activities for malicious behavior and generates alerts.
Intrusion Prevention System
IPS
A system that monitors network traffic and actively blocks detected threats in real time.
Security Information and Event Management
SIEM
A system that aggregates and analyzes security event data from across an organization to detect and respond to threats.
Log Management
The process of collecting, storing, analyzing, and monitoring log data generated by systems and applications.
Incident Response
IR
A structured process for identifying, containing, eradicating, and recovering from security incidents.
Monitoring and Alerting
The continuous observation of systems and networks with automated notifications triggered when anomalies or potential security incidents are detected.

Topics

Security Monitoring Siem Ids Ips Edr Firewall Incident Detection Cybersecurity

Transcript

Alerts as an Indicator

Being in IT, I would always monitor the systems that I was managing, and then I would have alerts that would come up. They would send me a text if something went down or something went awry. So there's some sort of monitoring and alerting that's happening.

If we're getting alerts, that could be an indicator that there's some sort of attack or compromise of our system, and we're going to want to investigate.

I think the key to this is that you're going to want to set up monitoring and alerting ahead of time, so that you understand what's happening on your network and are alerted when you need to do some further investigation. There's some tuning that happens with this, because it is a little tricky to make sure that you get it right, where you're not getting notified just off of anything, but off of the more critical things you are getting notified.

Systems That Alert You

Just a few of the systems that we might get alerted off of:

  • Antivirus and anti-malware systems
  • The firewall
  • Endpoint detection and response, an EDR system
  • An intrusion detection system or intrusion prevention system
  • The security information and event management system, the SIEM

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