{"id":71585,"date":"2020-02-27T02:48:56","date_gmt":"2020-02-26T23:48:56","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-ublock-origin-1-25-s-zashhitoj-ot-obhoda-blokirovki-cherez-manipulyaczii-s-dns"},"modified":"2020-03-03T16:10:43","modified_gmt":"2020-03-03T13:10:43","slug":"vypusk-ublock-origin-1-25-s-zashhitoj-ot-obhoda-blokirovki-cherez-manipulyaczii-s-dns","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/vypusk-ublock-origin-1-25-s-zashhitoj-ot-obhoda-blokirovki-cherez-manipulyaczii-s-dns","title":{"rendered":"Lan\u00e7amento do uBlock Origin 1.25 com prote\u00e7\u00e3o contra contornos de bloqueio atrav\u00e9s de manipula\u00e7\u00f5es de DNS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dispon\u00edvel<\/a><\/noindex> nova vers\u00e3o do bloqueador de conte\u00fado indesejado uBlock Origin 1.25<\/a><\/noindex>, que fornece bloqueio de an\u00fancios, elementos maliciosos, c\u00f3digos para rastreamento de comportamento, mineradores de JavaScript e outros elementos que interferem no funcionamento normal. A extens\u00e3o uBlock Origin se destaca pela alta performance e baixo consumo de mem\u00f3ria, permitindo n\u00e3o apenas eliminar elementos intrusivos, mas tamb\u00e9m reduzir o uso de recursos e acelerar o carregamento das p\u00e1ginas.<\/p>\n

Na nova vers\u00e3o para usu\u00e1rios do Firefox, foi implementado o bloqueio de uma nova t\u00e9cnica de rastreamento de comportamento e inser\u00e7\u00e3o de an\u00fancios baseada na cria\u00e7\u00e3o de um subdom\u00ednio DNS separado dentro do dom\u00ednio do site atual. O subdom\u00ednio criado aponta para o servidor da rede de an\u00fancios (por exemplo, \u00e9 criada uma entrada CNAME f7ds.liberation.fr, que aponta para o servidor de rastreamento liberation.eulerian.net), portanto, o c\u00f3digo publicit\u00e1rio \u00e9 formalmente carregado do mesmo dom\u00ednio principal do site. O nome para o subdom\u00ednio \u00e9 escolhido na forma de um identificador aleat\u00f3rio, o que dificulta o bloqueio por m\u00e1scara, pois o subdom\u00ednio associado \u00e0 rede de an\u00fancios \u00e9 dif\u00edcil de distinguir de subdom\u00ednios utilizados para carregar outros recursos locais da p\u00e1gina. <\/p>\n

Na nova vers\u00e3o do uBlock Origin para determinar o host associado via CNAME o sinalizador -k para integra\u00e7\u00e3o com<\/a><\/noindex> chamada para resolu\u00e7\u00e3o<\/a><\/noindex> do nome em DNS, o que permite aplicar listas de bloqueio tamb\u00e9m para nomes redirecionados via CNAME.
\nDo ponto de vista de performance, a determina\u00e7\u00e3o de CNAME n\u00e3o deve resultar em custos adicionais, al\u00e9m do consumo de recursos do processador para reaplicar regras para outro nome, uma vez que ao acessar o recurso o navegador j\u00e1 executou a resolu\u00e7\u00e3o, e o valor deve estar em cache. Ao instalar a nova vers\u00e3o, ser\u00e1 necess\u00e1rio conceder permiss\u00f5es para obter informa\u00e7\u00f5es do DNS.<\/p>\n

\"Lan\u00e7amento<\/a><\/noindex><\/center><\/p>\n

O m\u00e9todo de prote\u00e7\u00e3o adicionado baseado na verifica\u00e7\u00e3o de CNAME pode ser contornado por meio da vincula\u00e7\u00e3o direta do nome ao IP sem o uso de CNAME, mas essa abordagem complica a manuten\u00e7\u00e3o e o suporte da infraestrutura (se o endere\u00e7o IP da rede de an\u00fancios mudar, ser\u00e1 necess\u00e1rio garantir a altera\u00e7\u00e3o dos dados em todos os servidores DNS dos editores) e pode ser contornado atrav\u00e9s da cria\u00e7\u00e3o de uma lista negra de endere\u00e7os IP de rastreadores. Na constru\u00e7\u00e3o do uBlock Origin para Chrome, a verifica\u00e7\u00e3o de CNAME n\u00e3o funciona, pois a API dns.resolve()<\/a><\/noindex> dispon\u00edvel apenas para complementos no Firefox e n\u00e3o suportado no Chrome. <\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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