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Website Monitoring (Live)

Real-time website monitoring with Prometheus Blackbox Exporter and Grafana — HTTP status, response time, DNS lookup, TLS version, and days until certificate expiry.

Live Refresh: 10 sec • Period: last 1 hour
Demo view (read-only)
Grafana • kiosk

Website Monitoring with Blackbox Exporter

This page shows live monitoring of websites and external services using Prometheus Blackbox Exporter, visualized in Grafana. We monitor whether a website responds correctly, how quickly it loads, and whether there are issues with DNS, HTTPS, TLS or the SSL certificate.

Blackbox Exporter checks external addresses in the same way a real user would access them. This allows us to understand not only whether the server is running, but whether the website is actually reachable over HTTP or HTTPS and whether the response time is within normal limits.

We monitor HTTP status codes, response time, DNS lookup, TCP connect, TLS handshake, TLS version and the remaining days before the SSL certificate expires. If a problem occurs, the system can send alerts via Email, Telegram or Slack.

This helps with early detection of down websites, slow responses, DNS problems, expiring certificates and unstable external availability.

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What We Monitor

  • HTTP/HTTPS status
  • Uptime and availability
  • Response time
  • SSL certificates
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Technologies

Prometheus Blackbox Exporter, Grafana and Alertmanager with a centralized read-only dashboard.

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Benefits

Early detection of down websites, slow responses, DNS errors and certificate issues.

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Alerts

Notifications for DOWN status, high latency, TLS issues or upcoming SSL certificate expiration.

Author photo
Author

Eng. Svilen Arsov

Head of IT Infrastructure and Security at Network Technology.

Learn more about the team · Opinions and analysis · LinkedIn

Frequently Asked Questions (FAQ)

No. The embedded Grafana dashboard is read-only in kiosk mode.

The data is refreshed every 10 seconds, displaying the last 1 hour.

Yes. We add new addresses into the Prometheus/Blackbox configuration and they automatically appear on the dashboard.

Blackbox Exporter can monitor HTTP/HTTPS, TCP, DNS and ICMP checks depending on the infrastructure requirements.