{"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\/sv\/blog\/news\/oshibka-v-bind-9-16-privodyashhaya-k-narusheniyu-obrabotki-tcp-soedinenij","title":{"rendered":"Fel i BIND 9.16 som leder till problem med TCP-anslutningar","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I en tr\u00e5d publicerad f\u00f6r tv\u00e5 veckor sedan BIND 9.16.0<\/a><\/noindex> identifierades en allvarlig fel<\/a><\/noindex>, vilket leder till att gr\u00e4nsen f\u00f6r antalet TCP-anslutningar \u00f6verskrids. I BIND 9.16 introducerades ett nytt n\u00e4tverksystem, omgjort f\u00f6r att anv\u00e4nda en asynkron beg\u00e4rningshanteringsmekanism baserad p\u00e5 biblioteket libuv<\/a><\/noindex>. P\u00e5 grund av ett fel i detta system minskar inte antalet aktiva TCP-anslutningar under vissa f\u00f6rh\u00e5llanden, vilket leder till ett v\u00e4xande avvikelse mellan dess v\u00e4rde och det faktiska antalet anslutningar. Efter en tid kan v\u00e4rdet p\u00e5 r\u00e4knaren n\u00e5 den inst\u00e4llda gr\u00e4nsen f\u00f6r kundanslutningar och nya beg\u00e4rningar \u00f6ver TCP kommer att sluta tas emot (beg\u00e4rningar \u00f6ver UDP forts\u00e4tter att behandlas). <\/p>\n

Problemet framtr\u00e4der fr\u00e4mst p\u00e5 servrar som tar emot TCP-anslutningar fr\u00e5n klienter p\u00e5 flera n\u00e4tverksgr\u00e4nssnitt samtidigt.
\nUppdateringen av BIND 9.16 har \u00e4nnu inte sl\u00e4ppts, men f\u00f6r att \u00e5tg\u00e4rda felet har en patch<\/a><\/noindex>publicerats. Som en tillf\u00e4llig l\u00f6sning kan man st\u00e4lla in en gr\u00e4ns f\u00f6r antalet anslutningar (alternativet tcp-clients) till ett mycket stort v\u00e4rde. F\u00f6rutom BIND 9.16 ber\u00f6r problemet den experimentella grenen 9.15, med b\u00f6rjan fr\u00e5n version 9.15.6, men denna gren anv\u00e4nds ursprungligen endast f\u00f6r utveckling och \u00e4r inte avsedd f\u00f6r implementering p\u00e5 produktionsservrar.<\/p>\n

<\/a><\/noindex><\/p>\n

K\u00e4lla: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\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 […]<\/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\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Fel i BIND 9.16, som leder till problem med TCP-anslutningar | ProHoster","description":"I en tr\u00e5d publicerad f\u00f6r tv\u00e5 veckor sedan, BIND 9.16.0 identifierades en 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