Dual-stack checks before publishing AAAA
An AAAA record makes IPv6-capable clients attempt IPv6 first in many environments. Confirm that the server listens on IPv6, firewall rules permit traffic, TLS certificates cover the hostname, and any CDN or load balancer supports the path.
When A and AAAA disagree
If IPv4 works but IPv6 fails, some visitors may see a broken site while others do not. Test both address families separately and remove or correct an unreachable AAAA record instead of relying on clients to fall back.
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