{"id":73029,"date":"2020-03-06T14:42:02","date_gmt":"2020-03-06T11:42:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/oshibka-v-bind-9-16-privodyashhaya-k-narusheniyu-obrabotki-tcp-soedinenij"},"modified":"2020-03-06T14:42:02","modified_gmt":"2020-03-06T11:42:02","slug":"oshibka-v-bind-9-16-privodyashhaya-k-narusheniyu-obrabotki-tcp-soedinenij","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/oshibka-v-bind-9-16-privodyashhaya-k-narusheniyu-obrabotki-tcp-soedinenij","title":{"rendered":"Erro no BIND 9.16 que compromete o processamento de conex\u00f5es TCP","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Na thread publicada h\u00e1 duas semanas <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52405\">BIND 9.16.0<\/a><\/noindex> foi identificada uma grave <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/bind-announce@lists.isc.org\/msg00567.html\">erro<\/a><\/noindex>, que leva ao esgotamento do limite de conex\u00f5es TCP. No BIND 9.16, uma nova subsistema de rede foi proposta, baseado em um mecanismo de processamento ass\u00edncrono de requisi\u00e7\u00f5es com a biblioteca <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libuv\/libuv\">libuv<\/a><\/noindex>. Devido a um erro nesse subsistema, o contador de conex\u00f5es TCP ativas n\u00e3o diminui sob certas condi\u00e7\u00f5es, o que leva a uma discrep\u00e2ncia crescente entre seu valor e o n\u00famero real de conex\u00f5es. Ap\u00f3s algum tempo, o valor do contador pode atingir o limite estabelecido de conex\u00f5es de clientes, e novas requisi\u00e7\u00f5es TCP deixar\u00e3o de ser aceitas (as requisi\u00e7\u00f5es UDP continuar\u00e3o sendo processadas). <\/p>\n<p>O problema se manifesta principalmente em servidores que aceitam conex\u00f5es TCP de clientes em v\u00e1rias interfaces de rede simultaneamente.<br \/>\nA atualiza\u00e7\u00e3o do BIND 9.16 ainda n\u00e3o foi lan\u00e7ada, mas uma corre\u00e7\u00e3o para o erro foi publicada <noindex><a rel=\"nofollow\" href=\"https:\/\/downloads.isc.org\/isc\/bind9\/9.16.0\/patches\">patch<\/a><\/noindex>. Como solu\u00e7\u00e3o tempor\u00e1ria, \u00e9 poss\u00edvel definir um limite para o n\u00famero de conex\u00f5es (op\u00e7\u00e3o tcp-clients) em um valor muito alto. Al\u00e9m do BIND 9.16, o problema afeta a vers\u00e3o experimental 9.15, a partir do lan\u00e7amento 9.15.6, mas esta vers\u00e3o \u00e9 originalmente destinada apenas ao desenvolvimento e n\u00e3o \u00e9 voltada para a implementa\u00e7\u00e3o em servidores de produ\u00e7\u00e3o.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52490\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0434\u0432\u0435 \u043d\u0435\u0434\u0435\u043b\u0438 \u043d\u0430\u0437\u0430\u0434 \u0432\u0435\u0442\u043a\u0435 BIND 9.16.0 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0441\u0435\u0440\u044c\u0451\u0437\u043d\u0430\u044f \u043e\u0448\u0438\u0431\u043a\u0430, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u044e \u043b\u0438\u043c\u0438\u0442\u0430 \u043d\u0430 \u0447\u0438\u0441\u043b\u043e TCP-\u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0439. \u0412 BIND 9.16 \u0431\u044b\u043b\u0430 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u0430 \u043d\u043e\u0432\u0430\u044f \u0441\u0435\u0442\u0435\u0432\u0430\u044f \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0430, \u043f\u0435\u0440\u0435\u0432\u0435\u0434\u0451\u043d\u043d\u0430\u044f \u043d\u0430 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 libuv. \u0418\u0437-\u0437\u0430 \u043e\u0448\u0438\u0431\u043a\u0438 \u0432 \u0434\u0430\u043d\u043d\u043e\u0439 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0441\u0447\u0451\u0442\u0447\u0438\u043a \u0430\u043a\u0442\u0438\u0432\u043d\u044b\u0445 TCP-\u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0439 \u043f\u0440\u0438 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u043b\u043e\u0432\u0438\u044f\u0445 \u043d\u0435 \u0443\u043c\u0435\u043d\u044c\u0448\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a \u043d\u0430\u0440\u0430\u0441\u0442\u0430\u044e\u0449\u0435\u043c\u0443 \u0440\u0430\u0441\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044e \u0435\u0433\u043e [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-73029","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0434\u0432\u0435 \u043d\u0435\u0434\u0435\u043b\u0438 \u043d\u0430\u0437\u0430\u0434 \u0432\u0435\u0442\u043a\u0435 BIND 9.16.0 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0441\u0435\u0440\u044c\u0451\u0437\u043d\u0430\u044f\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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