How to Diagnose a Website That Fails Only on IPv6 Connections

A site can work over IPv4 while IPv6 traffic reaches an incorrect address, blocked listener, or incomplete network path.

Checks to make

Check authoritative AAAA records, confirm the server listens on IPv6, and test firewall and load balancer behavior from an IPv6-capable network. Compare TLS and application responses over both protocols before removing records or changing routing.

When to get help

Hosting support can review DNS, listener, and network configuration. Informatix Systems can assess the symptoms, evidence, and next steps. Contact Informatix Systems to discuss this issue.