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Troubleshooting

The following topics are useful for troubleshooting DNS issues.

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FAQs — DNS Firewall

Troubleshooting DNSSEC

FAQ

Cannot verify a domain with CNAME

Existing NS records block new record creation

Exposed IP addresses

Cannot add DNS records with the same name

Stale response for upstream DNS resolution

Unexpected DNS records

Troubleshooting

Enforce DNS-only

Available debug endpoints

General DNS issues

Fix DNS_PROBE_FINISHED_NXDOMAIN

Fix DNS_PROBE_POSSIBLE error

Troubleshooting email issues

Troubleshooting primary setup (full)

Cannot add domain to Cloudflare

Delete all DNS records

Domain deleted from Cloudflare

Zone stuck in Pending Nameserver Update

Troubleshooting secondary nameservers

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