DNS Misconfigured: Diagnosis & Correction
Identify DNS errors that make your site inaccessible or unstable.
Bad DNS configuration can make your site completely inaccessible, redirect traffic to the wrong server, or break your emails. DNS errors are sneaky because they may seem to work for some users but not others.
This guide helps you diagnose common DNS problems and fix them to ensure reliable domain resolution.
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Diagnosis
- dig/nslookup: Query DNS to see current records and their TTL.
- Multi-DNS test: Test from 8.8.8.8 (Google) and 1.1.1.1 (Cloudflare) to see differences.
- NS verification: Confirm NS at registrar match your DNS zone.
Frequently Asked Questions
Why does my site work for me but not others?
Your local DNS cache has old values. Others haven't propagated the new ones yet, or vice-versa.
How long to propagate a DNS change?
Depends on old record's TTL. If TTL = 3600, up to 1 hour. If TTL = 86400, up to 24 hours.
How to force DNS propagation?
You cannot force global propagation. You can flush local cache and reduce TTL before changes.
Can MoniTao detect DNS issues?
Yes, MoniTao monitors DNS resolution and alerts you if your domain no longer resolves correctly.
Useful Links
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