How to Diagnose a Hosted Website That Fails Only on IPv6

A website can work over IPv4 and fail over IPv6 when an AAAA record points to an unconfigured address, the firewall lacks an IPv6 rule, or the web server listens only on IPv4. Some visitors may see intermittent failures depending on their network.

What to check

Compare A and AAAA answers, test the service over each protocol, inspect IPv6 firewall and listener configuration, and check certificates and virtual hosts on the IPv6 path. Review access logs for missing requests from affected users.

Recommended next step

Correct the IPv6 route and service configuration or remove an incorrect AAAA record if IPv6 is not supported. Verify end-to-end behavior from an IPv6-capable network before considering the issue resolved.

How Informatix Systems can help

Informatix Systems provides cloud hosting, server management, and network services. We can assess the affected systems, clarify likely causes, and help plan a practical fix. Contact us with the platform involved, when the issue began, and non-sensitive error details.