Understand every HTTP status code and its monitoring impact.
HTTP status codes are the universal language of the web. They indicate whether a request succeeded, failed, or requires additional action. Understanding these codes is essential for troubleshooting.
This glossary covers the most common codes, organized by category. Each code includes its meaning and implications for monitoring.
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No. A server can return 200 with an application error page. Use content verification.
401 = not authenticated (who are you?). 403 = authenticated but not authorized (you don't have permission).
No, it's normal and desirable. It indicates caching is working correctly.
4xx are client errors (bad request). 5xx indicate your server has a problem.
Check that the upstream server is reachable, that timeouts are sufficient, and check proxy logs.
Yes, it's even best practice. 503 indicates temporary and intentional unavailability.
Understanding HTTP codes is fundamental to quickly diagnosing problems. This glossary is your quick reference.
MoniTao monitors your services' response codes and alerts you when an unexpected code appears. Configure your monitors for complete coverage.
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