{"id":36652,"date":"2019-10-31T22:12:57","date_gmt":"2019-10-31T19:12:57","guid":{"rendered":"https:\/\/prohoster.info\/blog\/lyubit-i-ne-lyubit-dns-over-https\/"},"modified":"2019-10-31T22:12:57","modified_gmt":"2019-10-31T19:12:57","slug":"lyubit-i-ne-lyubit-dns-over-https","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/administrirovanie\/lyubit-i-ne-lyubit-dns-over-https","title":{"rendered":"\u201cAma e n\u00e3o ama\u201d: DNS sobre HTTPS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Analisamos as opini\u00f5es sobre as caracter\u00edsticas do DNS over HTTPS, que recentemente se tornou uma \"ma\u00e7\u00e3 da disc\u00f3rdia\" entre provedores de internet e desenvolvedores de navegadores.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/461431\/\"><img decoding=\"async\" alt=\"\u201cAma e n\u00e3o ama\u201d: DNS sobre HTTPS\" src=\"\/wp-content\/uploads\/2019\/07\/56e79a71ff1fb4c89cc60779cd248fcd.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<i>\/ Unsplash \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/NPKk_3ZK2DY\">Steve Halama<\/a><\/noindex><\/i><\/p>\n<h2>O cerne das diverg\u00eancias<\/h2>\n<p>\nRecentemente <noindex><a rel=\"nofollow\" href=\"https:\/\/www.forbes.com\/sites\/zakdoffman\/2019\/07\/05\/mozilla-slammed-as-internet-villain-for-letting-children-visit-banned-websites\/\">grandes meios de comunica\u00e7\u00e3o<\/a><\/noindex> e <noindex><a rel=\"nofollow\" href=\"https:\/\/www.reddit.com\/r\/news\/comments\/bhn8hn\/dns_over_https_is_coming_whether_isps_and\/\">plataformas especializadas<\/a><\/noindex> (incluindo o Habr), frequentemente escrevem sobre o protocolo DNS over HTTPS (DoH). Ele cifra as solicita\u00e7\u00f5es ao servidor DNS e as respostas a elas. Essa abordagem permite ocultar os nomes dos hosts que o usu\u00e1rio acessa. As publica\u00e7\u00f5es sugerem que o novo protocolo (aprovado pelo IETF <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc8484\">em 2018)<\/a><\/noindex> dividiu a comunidade de TI em duas fac\u00e7\u00f5es.<\/p>\n<p>Uma metade acredita que o novo protocolo aumentar\u00e1 a seguran\u00e7a da internet e o est\u00e1 implementando em seus aplicativos e servi\u00e7os. A outra metade est\u00e1 convencida de que a tecnologia apenas torna o trabalho dos administradores de sistemas mais complicado. A seguir, analisaremos os argumentos de ambos os lados. <\/p>\n<h2>Como funciona o DoH<\/h2>\n<p>\nAntes de discutirmos por que provedores de internet e outros participantes do mercado s\u00e3o a favor ou contra o DNS over HTTPS, vamos resumir brevemente os princ\u00edpios de seu funcionamento.<\/p>\n<p>No caso do DoH, a solicita\u00e7\u00e3o para resolver um endere\u00e7o IP \u00e9 encapsulada no tr\u00e1fego HTTPS. Em seguida, ela \u00e9 enviada a um servidor HTTP, onde \u00e9 processada por meio de uma API. Aqui est\u00e1 um exemplo de solicita\u00e7\u00e3o do RFC 8484 (<noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc8484\">p.6<\/a><\/noindex>):<\/p>\n<pre><code class=\"bash\">   :method = GET\n   :scheme = https\n   :authority = dnsserver.example.net\n   :path = \/dns-query?\n           dns=AAABAAABAAAAAAAAAWE-NjJjaGFyYWN0ZXJsYWJl\n           bC1tYWtlcy1iYXNlNjR1cmwtZGlzdGluY3QtZnJvbS1z\n           dGFuZGFyZC1iYXNlNjQHZXhhbXBsZQNjb20AAAEAAQ\n   accept = application\/dns-message\n<\/code><\/pre>\n<p>\nAssim, o tr\u00e1fego DNS fica oculto no tr\u00e1fego HTTPS. O cliente e o servidor se comunicam atrav\u00e9s da porta padr\u00e3o 443. Como resultado, as solicita\u00e7\u00f5es ao sistema de nomes de dom\u00ednio permanecem an\u00f4nimas.<\/p>\n<h2>Por que n\u00e3o \u00e9 bem-vindo<\/h2>\n<p>\nOs oponentes do DNS over HTTPS <noindex><a rel=\"nofollow\" href=\"https:\/\/www.theregister.co.uk\/2018\/10\/30\/dns_over_https_controversy\/\">dizem<\/a><\/noindex>, afirmam que o novo protocolo reduzir\u00e1 a seguran\u00e7a das conex\u00f5es. Segundo <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/paulvixie\/status\/1053765281917661184\">palavras<\/a><\/noindex> Paul Vixie, membro da equipe de desenvolvedores do DNS, ser\u00e1 mais dif\u00edcil para os administradores de sistemas bloquear sites potencialmente nocivos. Usu\u00e1rios comuns, por sua vez, perder\u00e3o a capacidade de configurar algum controle parental nos navegadores.<\/p>\n<p>A opini\u00e3o de Paul \u00e9 compartilhada pelos provedores de internet do Reino Unido. A legisla\u00e7\u00e3o do pa\u00eds <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Web_blocking_in_the_United_Kingdom\">obriga<\/a><\/noindex> a bloquear recursos com conte\u00fado proibido. Mas o suporte ao DoH nos navegadores dificulta a tarefa de filtrar tr\u00e1fego. Entre os cr\u00edticos do novo protocolo tamb\u00e9m est\u00e3o o Centro de Comunica\u00e7\u00f5es do Governo da Inglaterra (<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%A6%D0%B5%D0%BD%D1%82%D1%80_%D0%BF%D1%80%D0%B0%D0%B2%D0%B8%D1%82%D0%B5%D0%BB%D1%8C%D1%81%D1%82%D0%B2%D0%B5%D0%BD%D0%BD%D0%BE%D0%B9_%D1%81%D0%B2%D1%8F%D0%B7%D0%B8\">GCHQ<\/a><\/noindex>) e a funda\u00e7\u00e3o Internet Watch Foundation (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Internet_Watch_Foundation\">IWF<\/a><\/noindex>), que mant\u00e9m um registro de recursos bloqueados.<\/p>\n<blockquote><p><b>Em nosso blog no Habr:<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/457106\/\">A guerra contra chamadas rob\u00f4 nos EUA \u2014 quem est\u00e1 vencendo e por qu\u00ea<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/452312\/\">As telecomunica\u00e7\u00f5es brit\u00e2nicas pagar\u00e3o indeniza\u00e7\u00f5es aos assinantes por interrup\u00e7\u00f5es no servi\u00e7o<\/a><\/noindex><\/li>\n<\/ul>\n<\/blockquote>\n<p>\nEspecialistas observam que DNS sobre HTTPS pode se tornar uma amea\u00e7a \u00e0 ciberseguran\u00e7a. No in\u00edcio de julho, especialistas em seguran\u00e7a da informa\u00e7\u00e3o da Netlab <noindex><a rel=\"nofollow\" href=\"https:\/\/www.zdnet.com\/article\/first-ever-malware-strain-spotted-abusing-new-doh-dns-over-https-protocol\/\">descobriram<\/a><\/noindex> o primeiro v\u00edrus a utilizar o novo protocolo para realizar ataques DDoS \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.netlab.360.com\/an-analysis-of-godlua-backdoor-en\/\">Godlua<\/a><\/noindex>. O malware utilizou DoH para obter registros de texto (TXT) e extrair URLs dos servidores de comando.<\/p>\n<p>As requisi\u00e7\u00f5es DoH criptografadas n\u00e3o foram reconhecidas pelo software antiv\u00edrus. Especialistas em seguran\u00e7a da informa\u00e7\u00e3o <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/GossiTheDog\/status\/1146138461969244160\">temem<\/a><\/noindex>, que ap\u00f3s Godlua, outros malwares invis\u00edveis ao monitoramento passivo de DNS surgir\u00e3o.<\/p>\n<h2>Mas nem todos s\u00e3o contra<\/h2>\n<p>\nEm defesa do DNS sobre HTTPS, em seu blog <noindex><a rel=\"nofollow\" href=\"https:\/\/www.potaroo.net\/ispcol\/2018-10\/doh.html\">se manifestou<\/a><\/noindex> o engenheiro da APNIC, Geoff Houston. Segundo ele, o novo protocolo ajudar\u00e1 a combater ataques de hijacking de DNS, que t\u00eam se tornado cada vez mais frequentes. Esse fato <noindex><a rel=\"nofollow\" href=\"https:\/\/arstechnica.com\/information-technology\/2019\/01\/a-dns-hijacking-wave-is-targeting-companies-at-an-almost-unprecedented-scale\/\">confirma<\/a><\/noindex> um relat\u00f3rio de janeiro da FireEye. O desenvolvimento do protocolo tamb\u00e9m contou com o apoio de grandes empresas de TI.<\/p>\n<p>No in\u00edcio do ano passado, o DoH come\u00e7ou a ser testado no Google. E h\u00e1 um m\u00eas, a empresa <noindex><a rel=\"nofollow\" href=\"http:\/\/www.googblogs.com\/google-public-dns-over-https-doh-supports-rfc-8484-standard\/\">apresentou<\/a><\/noindex> General Availability da sua vers\u00e3o do servi\u00e7o DoH. No Google <noindex><a rel=\"nofollow\" href=\"https:\/\/threatpost.com\/google-announces-dns-over-https-general-availability\/146057\/\">esperam<\/a><\/noindex>, que isso aumente a seguran\u00e7a dos dados pessoais na rede e proteja contra ataques MITM.<\/p>\n<p>Outro desenvolvedor de navegadores \u2014 Mozilla \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.nightly.mozilla.org\/2018\/06\/01\/improving-dns-privacy-in-firefox\/\">suporta<\/a><\/noindex>\u00a0adota DNS sobre HTTPS desde o ver\u00e3o do ano passado. Ao mesmo tempo, a empresa promove ativamente a nova tecnologia no setor de TI. Por isso, a associa\u00e7\u00e3o dos provedores Internet Services Providers Association (ISPA) <noindex><a rel=\"nofollow\" href=\"https:\/\/www.zdnet.com\/article\/uk-isp-group-names-mozilla-internet-villain-for-supporting-dns-over-https\/\">at\u00e9 nomeou<\/a><\/noindex> a Mozilla para o pr\u00eamio \"vil\u00e3o da internet do ano\". Em resposta, representantes da empresa <noindex><a rel=\"nofollow\" href=\"https:\/\/www.forbes.com\/sites\/zakdoffman\/2019\/07\/05\/mozilla-slammed-as-internet-villain-for-letting-children-visit-banned-websites\/\">observado<\/a><\/noindex>, que est\u00e3o desapontados com a relut\u00e2ncia dos operadores de telecomunica\u00e7\u00f5es em melhorar a infraestrutura de internet obsoleta.<\/p>\n<p><img decoding=\"async\" alt=\"\u201cAma e n\u00e3o ama\u201d: DNS sobre HTTPS\" src=\"\/wp-content\/uploads\/2019\/07\/611a1f2d8248e7d61b969c71e5f14d31.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>\/ Unsplash \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/MyzdAXPgr_8\">TETrebbien<\/a><\/noindex><\/i><\/p>\n<p>Em apoio \u00e0 Mozilla <noindex><a rel=\"nofollow\" href=\"https:\/\/www.theregister.co.uk\/2019\/07\/12\/ispa_hands_awards_to_bt_and_openreach_following_mozilla_gaffe\/\">falaram grandes ve\u00edculos de m\u00eddia<\/a><\/noindex> e alguns provedores de internet. Em particular, a British Telecom <noindex><a rel=\"nofollow\" href=\"https:\/\/www.icann.org\/sites\/default\/files\/packages\/ids-2019\/08-fidler-icann-dns-symposium-a-uk-isp-view-on-doh-issue-11may19-en.pdf\">acreditam<\/a><\/noindex>, que o novo protocolo n\u00e3o afetar\u00e1 a filtragem de conte\u00fado e aumentar\u00e1 a seguran\u00e7a dos usu\u00e1rios brit\u00e2nicos. Sob press\u00e3o do p\u00fablico, a ISPA <noindex><a rel=\"nofollow\" href=\"https:\/\/www.ispa.org.uk\/ispa-withdraws-mozilla-internet-villain-nomination-and-category\/\">teve que retirar<\/a><\/noindex> a indica\u00e7\u00e3o de \"vil\u00e3o\".<\/p>\n<p>Al\u00e9m disso, provedores de nuvem tamb\u00e9m defenderam a ado\u00e7\u00e3o do DNS sobre HTTPS, por exemplo <noindex><a rel=\"nofollow\" href=\"https:\/\/www.zdnet.com\/article\/how-to-enable-dns-over-https-doh-in-firefox\/\">Cloudflare<\/a><\/noindex>. Eles j\u00e1 oferecem servi\u00e7os de DNS baseados no novo protocolo. A lista completa de navegadores e clientes com suporte a DoH est\u00e1 dispon\u00edvel em\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/curl\/curl\/wiki\/DNS-over-HTTPS\">GitHub<\/a><\/noindex>.<\/p>\n<p>De qualquer forma, ainda n\u00e3o \u00e9 poss\u00edvel falar sobre o fim do confronto entre os dois campos. Especialistas em TI preveem que, se o DNS sobre HTTPS realmente estiver destinado a se tornar parte do conjunto massivo de tecnologias da internet, isso levar\u00e1 <noindex><a rel=\"nofollow\" href=\"https:\/\/packetpushers.net\/response-doh-dns-over-https-explained-apnic-blog\/\">mais de uma d\u00e9cada<\/a><\/noindex>.<\/p>\n<blockquote><p><b>Sobre o que mais escrevemos em nosso blog corporativo:<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/seti\/kak-postroena-set-internet-provajdera\/\">Como \u00e9 estruturada a rede do provedor de internet<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/seti\/osnovnye-servisy-v-setyax-internet-provajdera\/\">Servi\u00e7os principais nas redes do provedor de internet<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/telekom\/konvergenciya-i-unifikaciya-neskolko-zadach-na-odnom-ustrojstve\/\">Converg\u00eancia e unifica\u00e7\u00e3o \u2014 v\u00e1rias tarefas em um \u00fanico dispositivo<\/a><\/noindex><\/li>\n<\/ul>\n<\/blockquote>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/461431\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0431\u0438\u0440\u0430\u0435\u043c \u043c\u043d\u0435\u043d\u0438\u044f \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0435\u0439 \u0440\u0430\u0431\u043e\u0442\u044b DNS over HTTPS, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0437\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0435 \u0432\u0440\u0435\u043c\u044f \u0441\u0442\u0430\u043b\u0438 \u00ab\u044f\u0431\u043b\u043e\u043a\u043e\u043c \u0440\u0430\u0437\u0434\u043e\u0440\u0430\u00bb \u0441\u0440\u0435\u0434\u0438 \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442-\u043f\u0440\u043e\u0432\u0430\u0439\u0434\u0435\u0440\u043e\u0432 \u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u043e\u0432. \/ Unsplash \/ Steve Halama \u0421\u0443\u0442\u044c \u0440\u0430\u0437\u043d\u043e\u0433\u043b\u0430\u0441\u0438\u0439 \u0412 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0435 \u0432\u0440\u0435\u043c\u044f \u043a\u0440\u0443\u043f\u043d\u044b\u0435 \u0421\u041c\u0418 \u0438 \u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u043f\u043b\u043e\u0449\u0430\u0434\u043a\u0438 (\u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u0425\u0430\u0431\u0440), \u0447\u0430\u0441\u0442\u043e \u043f\u0438\u0448\u0443\u0442 \u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0435 DNS over HTTPS (DoH). \u041e\u043d \u0448\u0438\u0444\u0440\u0443\u0435\u0442 \u0437\u0430\u043f\u0440\u043e\u0441\u044b \u043a DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0443 \u0438 \u043e\u0442\u0432\u0435\u0442\u044b \u043d\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":27449,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-36652","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0420\u0430\u0437\u0431\u0438\u0440\u0430\u0435\u043c \u043c\u043d\u0435\u043d\u0438\u044f \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0435\u0439 \u0440\u0430\u0431\u043e\u0442\u044b DNS over HTTPS, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0437\u0430 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