DNS Issues

DNS propagation, misconfiguration, and resolution problems.

Guides

DNS Propagation DelayLearn why DNS changes take time to propagate, how to diagnose propagation issues, and how to speed up DNS updates using WarpCheck diagnostic tools.

DNS Record MisconfigurationDiagnose and fix common DNS record misconfigurations including wrong A records, missing MX records, and conflicting CNAME entries.

Nameserver Not RespondingTroubleshoot nameserver failures causing DNS resolution issues. Diagnose unresponsive nameservers and fix domain resolution problems.

DNSSEC Validation FailureDiagnose and resolve DNSSEC validation failures including expired signatures, missing DS records, and algorithm mismatches.

DNS TTL Too HighLearn why excessively high DNS TTL values cause slow propagation and how to choose the right TTL for your domain.

DNS Cache PoisoningUnderstand DNS cache poisoning attacks, detect compromised DNS responses, and protect your domain with DNSSEC and secure configurations.

DNS Record Not FoundDiagnose NXDOMAIN errors and missing DNS records. Learn why DNS lookups return "record not found" and how to resolve them.

DNS Zone Transfer ExposedDetect and fix exposed DNS zone transfers that leak your entire domain structure. Secure AXFR configuration on nameservers.

DNS Delegation BrokenDiagnose and repair broken DNS delegation causing domain resolution failures. Fix lame delegation and nameserver mismatches.

DNS Glue Records MissingDiagnose and fix missing glue records that cause circular DNS resolution failures for domains using in-domain nameservers.

DNS Recursion DisabledUnderstand when DNS recursion should be enabled or disabled and how to troubleshoot resolution failures caused by recursion settings.

DNS Amplification RiskIdentify DNS amplification vulnerabilities on your nameservers and learn how to prevent your infrastructure from being used in DDoS attacks.