Тема: ipv6
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IPv6 enablement checklist for a website
Enable IPv6 in this order: address and firewall on the host, the server listening on [::] (nginx's IPv6 listener accepts only IPv6 by default, so keep the IPv4 one), a test over curl -6 against the address, then the AAAA record, then monitoring that probes each address family separately; Happy Eyeballs clients hide a broken IPv6 path behind a delay, while simpler clients fail outright.
Машиночитаемо: JSON