{"id":38794,"date":"2019-10-31T22:25:59","date_gmt":"2019-10-31T19:25:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-tor-otklyucheny-800-iz-6000-uzlov-iz-za-primeneniya-ustarevshego-po\/"},"modified":"2019-10-31T22:25:59","modified_gmt":"2019-10-31T19:25:59","slug":"v-tor-otklyucheny-800-iz-6000-uzlov-iz-za-primeneniya-ustarevshego-po","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/v-tor-otklyucheny-800-iz-6000-uzlov-iz-za-primeneniya-ustarevshego-po","title":{"rendered":"O Tor desativou 800 de 6000 n\u00f3s devido ao uso de software desatualizado","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Desenvolvedores da rede an\u00f4nima Tor avisaram<\/a><\/noindex> sobre a realiza\u00e7\u00e3o de uma grande limpeza nos n\u00f3s que utilizam software desatualizado, cujo suporte foi encerrado. No dia 8 de outubro, cerca de 800 n\u00f3s desatualizados que operavam em modo de rel\u00e9 foram bloqueados (no total, a rede Tor possui mais de 6000 desses n\u00f3s). O bloqueio foi feito por meio da inclus\u00e3o em servidores de diret\u00f3rio da lista negra dos n\u00f3s problem\u00e1ticos. A exclus\u00e3o da rede de n\u00f3s de ponte desatualizados (bridge) \u00e9 esperada para mais tarde. <\/p>\n

Na pr\u00f3xima vers\u00e3o est\u00e1vel do Tor, prevista para novembro, haver\u00e1 uma op\u00e7\u00e3o que, por padr\u00e3o, rejeitar\u00e1 conex\u00f5es com n\u00f3s
\nque utilizam vers\u00f5es do Tor cujo suporte j\u00e1 expirou. Essa altera\u00e7\u00e3o permitir\u00e1, \u00e0 medida que o suporte a vers\u00f5es antigas seja encerrado, excluir automaticamente da rede n\u00f3s que n\u00e3o atualizarem seus softwares a tempo. Por exemplo, atualmente na rede Tor, ainda h\u00e1 n\u00f3s utilizando o Tor 0.2.4.x, que foi lan\u00e7ado em 2013, apesar de ainda continuar o suporte<\/a><\/noindex> para a vers\u00e3o LTS 0.2.9.<\/p>\n

Os operadores de sistemas desatualizados foram avisados sobre o bloqueio planejado em setembro<\/a><\/noindex> atrav\u00e9s de listas de distribui\u00e7\u00e3o e envio de avisos individuais para os endere\u00e7os de contato especificados no campo ContactInfo. Ap\u00f3s a notifica\u00e7\u00e3o, o n\u00famero de n\u00f3s n\u00e3o atualizados caiu de 1276 para aproximadamente 800. De acordo com uma avalia\u00e7\u00e3o preliminar, atualmente cerca de 12% do tr\u00e1fego passa por n\u00f3s desatualizados, sendo que a maior parte est\u00e1 relacionada \u00e0 transmiss\u00e3o de tr\u00e2nsito \u2014 a propor\u00e7\u00e3o de tr\u00e1fego dos n\u00f3s de sa\u00edda n\u00e3o atualizados \u00e9 de apenas 1,68% (62 n\u00f3s). Espera-se que a remo\u00e7\u00e3o da rede de n\u00f3s n\u00e3o atualizados impacte insignificativamente o tamanho da rede e resulte em uma ligeira queda nos \u00edndices. gr\u00e1ficos<\/a><\/noindex>, refletindo o estado da rede an\u00f4nima. <\/p>\n

A presen\u00e7a de n\u00f3s na rede com software desatualizado reflete negativamente na estabilidade e cria riscos adicionais de viola\u00e7\u00e3o de seguran\u00e7a. Se um administrador n\u00e3o acompanha a atualiza\u00e7\u00e3o do Tor, \u00e9 prov\u00e1vel que ele trate com neglig\u00eancia a atualiza\u00e7\u00e3o do sistema e de outros aplicativos de servidor, o que aumenta o risco de controle do n\u00f3 como resultado de ataques direcionados. <\/p>\n

Al\u00e9m disso, a presen\u00e7a de n\u00f3s com vers\u00f5es j\u00e1 n\u00e3o suportadas dificulta a corre\u00e7\u00e3o de erros cr\u00edticos, impede a dissemina\u00e7\u00e3o de novas funcionalidades do protocolo e reduz a efici\u00eancia da rede. Por exemplo, n\u00f3s desatualizados, em que ocorrem erro<\/a><\/noindex> no processador HSv3, resultam em aumento da lat\u00eancia ao trafegar por eles o tr\u00e1fego de usu\u00e1rios e elevam a carga total na rede devido ao envio de requisi\u00e7\u00f5es repetidas pelos clientes ap\u00f3s falhas no processamento das conex\u00f5es HSv3.<\/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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