DoT, DoH and DoQ

DNS clássico expõe metadados no caminho

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Recursão local, forward e encrypted forward não são equivalentes

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DNS-over-TLS — RFC 7858

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DNS-over-HTTPS — RFC 8484

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DNS-over-QUIC — RFC 9250

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Criptografia sem validação de identidade pode ser falsa security

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Como resolver o nome do próprio resolver?

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Forwarding com TLS

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Transportes criptografados existem, mas papel precisa estar claro

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Sistema operacional, navegador e aplicação podem usar resolvers diferentes

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DoH/DoT altera observabilidade e política de resolver local

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O caso clássico: domínio interno funciona no terminal, falha no navegador

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Não transforme controle DNS em interceptação TLS improvisada

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Monitore handshake, resolução e qualidade

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Captura muda conforme o transporte

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DoT/DoH “parou de funcionar”

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Quatro cenários práticos

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