DNS Troubleshooting Guides

Learn how DNS works, troubleshoot common DNS issues, understand record types, and resolve domain configuration problems with practical, step-by-step guides.

Common DNS Issues

DNS_PROBE_FINISHED_NXDOMAIN

The requested domain name could not be resolved.

SERVFAIL

Understand why DNS servers fail to answer queries.

DNS Propagation

Learn why DNS changes aren’t visible immediately.

Incorrect Nameservers

Fix domains pointing to the wrong DNS provider.

DNS Records

A Record

Maps a domain or subdomain to an IPv4 address.

AAAA Record

Maps a domain or subdomain to an IPv6 address.

CNAME Record

Aliases one hostname to another domain name.

MX Record

Specifies the mail servers responsible for receiving email.

TXT Record

Stores text-based information used for domain verification, email authentication, and other services.

SPF Record

Defines which mail servers are authorized to send email for your domain.

DKIM

Uses digital signatures to verify the authenticity of outgoing email messages.

DMARC

Defines how email providers should handle messages that fail SPF or DKIM validation.