Building Resilient DNS Monitoring
By CaptainDNS
Published on October 17, 2025
When DNS goes down, everything else follows. At CaptainDNS, monitoring is approached in layers: change tracking, resolution testing and propagation measurements.
We start by comparing each DNS zone change. An automatic alert allows you to validate the change and confirm that it matches the production plan.
We then schedule iterative resolutions from multiple regions around the world. This reveals cache or delegation issues that only appear once propagation is complete.
Finally, we perform propagation scans via public resolvers. Comparing responses highlights stale caches and missing DNSSEC chains before they generate incidents; email deliverability and reception issues, inaccessible websites, etc.
CaptainDNS keeps deliverability KPIs in the green while enabling the technical team to work efficiently.
Related MCP and CaptainDNS guides
- Introduction to MCP for CaptainDNS - Learn what MCP is and why CaptainDNS adopts it.
- CaptainDNS MCP Architecture - Dive into the technical details of the MCP server.
- Auth0 + MCP Integration - OAuth2 authentication for the CaptainDNS MCP.
- MCP Widgets for ChatGPT - How ChatGPT widgets leverage the CaptainDNS MCP.
- Email Audit Widget in ChatGPT - Implementation of the email_auth_audit widget.
- History and DNS Monitoring - Diagnose, archive, share, then monitor.
