{"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\/it\/blog\/novosti-interneta\/oshibka-v-bind-9-16-privodyashhaya-k-narusheniyu-obrabotki-tcp-soedinenij","title":{"rendered":"Errore in BIND 9.16 che causa problemi nella gestione delle connessioni TCP.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Nella versione pubblicata due settimane fa <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52405\">BIND 9.16.0<\/a><\/noindex> \u00e8 stata identificata una grave <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/bind-announce@lists.isc.org\/msg00567.html\">un errore<\/a><\/noindex>, che porta all'esaurimento del limite sul numero di connessioni TCP. In BIND 9.16 \u00e8 stata proposta una nuova sottosistema di rete, implementata tramite un meccanismo di gestione asincrona delle richieste basato sulla libreria <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libuv\/libuv\">libuv<\/a><\/noindex>. A causa di un errore in questo sottosistema, il contatore delle connessioni TCP attive in alcune condizioni non si riduce, il che porta a una crescente discrepanza tra il suo valore e il numero effettivo di connessioni. Dopo un po', il valore del contatore pu\u00f2 raggiungere il limite stabilito per le connessioni dei client, causando l'interruzione dell'accettazione di nuove richieste TCP (le richieste UDP continueranno a essere elaborate). <\/p>\n<p>Il problema si manifesta principalmente sui server che accettano connessioni TCP dai client su pi\u00f9 interfacce di rete contemporaneamente.<br \/>\nL'aggiornamento di BIND 9.16 non \u00e8 ancora stato rilasciato, ma per risolvere il problema \u00e8 stato pubblicato <noindex><a rel=\"nofollow\" href=\"https:\/\/downloads.isc.org\/isc\/bind9\/9.16.0\/patches\">per correggere l'errore.<\/a><\/noindex>. Come soluzione temporanea, \u00e8 possibile impostare un limite sul numero di connessioni (opzione tcp-clients) a un valore molto elevato. Oltre a BIND 9.16, il problema interessa la versione sperimentale 9.15, a partire dal rilascio 9.15.6, ma questa versione \u00e8 originariamente destinata solo allo sviluppo e non \u00e8 progettata per l'implementazione su server di produzione.<\/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-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - 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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