Blog - Website monitoring, uptime, SSL guides

Practical articles about uptime, SSL, DNS, monitoring strategy and infrastructure.

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  2026-05-20 · 7 min

  DNS troubleshooting: nslookup, dig, DoH

  DNS issues are among the most common and hardest-to-diagnose causes of outages. Practical tools: nslookup, dig and DNS-over-HTTPS.

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  2026-05-19 · 6 min

  HTTP status codes explained: what 200, 404, 502 mean for monitoring

  An HTTP status code is the server's reply: 2xx OK, 3xx redirect, 4xx client error, 5xx server error. What they mean and which to monitor.

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  2026-05-19 · 6 min

  Monitoring cron jobs: the heartbeat pattern in practice

  HTTP monitoring will not tell you that a nightly cron failed. The heartbeat pattern flips the direction: the cron reports to the monitoring service, and if it does not call in on time, you get an alert.

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  2026-05-18 · 6 min

  SSL certificate expired - what to do

  An expired SSL certificate blocks access with an insecure-connection warning and conversions drop to zero. What to do right away and how to prevent it.

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  2026-05-18 · 5 min

  What is uptime and why it matters

  Uptime is the percentage of time a site is reachable. 99% means over three days of downtime a year; aim for 99.9% and know about issues within a minute.