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RFC8914
错误分类
NXDOMAIN Redirection Using DLZ in BIND 9.10 and later
https://datatracker.ietf.org/doc/html/draft-livingood-dns-redirect-03
https://datatracker.ietf.org/doc/html/draft-vixie-dnsop-dns-rpz-00
https://www.first.org/resources/papers/kathmandu2018/11-SumonSaha-DNS-Firewall-with-RPZ-bdcert.pdf