{"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\/news\/oshibka-v-bind-9-16-privodyashhaya-k-narusheniyu-obrabotki-tcp-soedinenij","title":{"rendered":"Errore in BIND 9.16, che porta a un'interruzione nella gestione delle connessioni TCP","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Nella sezione 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\">l'errore<\/a><\/noindex>, che porta all'esaurimento del limite sul numero di connessioni TCP. In BIND 9.16 \u00e8 stato introdotto un nuovo sottosistema di rete, basato su un meccanismo di elaborazione asincrona delle richieste tramite la libreria <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libuv\/libuv\">libuv<\/a><\/noindex>. A causa di un errore in questo sottosistema, il conteggio delle connessioni TCP attive in determinate condizioni non diminuisce, portando a un crescente divario tra il suo valore e il numero effettivo di connessioni. Dopo un po' di tempo, il valore del conteggio pu\u00f2 raggiungere il limite stabilito per il numero di connessioni client e nuove richieste TCP smetteranno di essere accettate (le richieste UDP continueranno ad essere elaborate). <\/p>\n<p>Il problema si manifesta principalmente sui server che ricevono connessioni TCP da clienti su pi\u00f9 interfacce di rete contemporaneamente.<br \/>\nL'aggiornamento BIND 9.16 non \u00e8 ancora stato rilasciato, ma \u00e8 stata pubblicata una <noindex><a rel=\"nofollow\" href=\"https:\/\/downloads.isc.org\/isc\/bind9\/9.16.0\/patches\">patch<\/a><\/noindex>. Come soluzione temporanea, \u00e8 possibile impostare il limite sul numero di connessioni (opzione tcp-clients) a un valore molto elevato. Oltre a BIND 9.16, il problema interessa anche il ramo sperimentale 9.15, a partire dalla versione 9.15.6, ma questo ramo \u00e8 utilizzato principalmente per lo sviluppo e non \u00e8 destinato all'implementazione sui 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-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - 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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