{"id":4201,"date":"2023-06-08T16:54:42","date_gmt":"2023-06-08T13:54:42","guid":{"rendered":"https:\/\/csirt.lacnic.net\/?p=4201"},"modified":"2023-06-08T20:48:49","modified_gmt":"2023-06-08T17:48:49","slug":"dns-open-resolvers-com-ipv4-que-envolvam-recursos-sob-a-administracao-do-lacnic","status":"publish","type":"post","link":"https:\/\/csirt.lacnic.net\/pt-br\/arquivo-pt-br\/dns-open-resolvers-com-ipv4-que-envolvam-recursos-sob-a-administracao-do-lacnic","title":{"rendered":"DNS open resolvers com IPv4 que envolvam recursos sob a administra\u00e7\u00e3o do LACNIC"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><a>Resumo executivo<\/a><\/h2>\n\n\n\n<p>O CSIRT do LACNIC e o CSIRT de CEDIA realizaram um estudo para identificar servidores de DNS abertos associados a um endere\u00e7o IPv4, a fim de informar os associados que t\u00eam designados esses recursos da situa\u00e7\u00e3o, sugerir alternativas para corrigir a configura\u00e7\u00e3o destes e tentar reduzir significativamente o n\u00famero de <em>open resolvers<\/em> na nossa regi\u00e3o. A comunica\u00e7\u00e3o foi feita por diferentes canais para avaliar, tamb\u00e9m, a efic\u00e1cia de cada um.<\/p>\n\n\n\n<p>Os <em>open resolvers<\/em> constituem um risco de seguran\u00e7a latente na infraestrutura da Internet, porque s\u00e3o servidores configurados de modo que podem ser usados \u200b\u200bpara atacar infraestruturas de terceiros e realizar ataques de nega\u00e7\u00e3o de servi\u00e7o.<\/p>\n\n\n\n<p>J\u00e1 em mar\u00e7o de 2013 o US-CERT emitiu sua alerta TA13-088A,<a href=\"#_ftn1\"><sup>[1]<\/sup><\/a> na qual adverte sobre o problema, e prop\u00f5e medidas de mitiga\u00e7\u00e3o.&nbsp;<\/p>\n\n\n\n<p><a class=\"btn-2\" href=\"https:\/\/csirt.lacnic.net\/wp-content\/uploads\/dns-open-resolvers-com-ipv4-que-envolvam-recursos-sob-a-administracao-do-lacnic.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Artigo [+]<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p><a href=\"#_ftnref1\"><sup>[1]<\/sup><\/a> \u2039https:\/\/us-cert.cisa.gov\/ncas\/alerts\/TA13-088A\u203a<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Resumo executivo O CSIRT do LACNIC e o CSIRT de CEDIA realizaram um estudo para identificar servidores de DNS abertos associados a um endere\u00e7o IPv4, a fim de informar os associados que t\u00eam designados esses recursos da situa\u00e7\u00e3o, sugerir alternativas para corrigir a configura\u00e7\u00e3o destes e tentar reduzir significativamente o n\u00famero de open resolvers na [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-4201","post","type-post","status-publish","format-standard","hentry","category-arquivo-pt-br"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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