{"id":35641,"date":"2019-10-31T22:05:29","date_gmt":"2019-10-31T19:05:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/utechka-bgp-marshrutov-privela-k-massovomu-narusheniyu-svyaznosti-v-internete\/"},"modified":"2019-10-31T22:05:29","modified_gmt":"2019-10-31T19:05:29","slug":"utechka-bgp-marshrutov-privela-k-massovomu-narusheniyu-svyaznosti-v-internete","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/utechka-bgp-marshrutov-privela-k-massovomu-narusheniyu-svyaznosti-v-internete","title":{"rendered":"\u00danik BGP tras vedl k masov\u00e9mu naru\u0161en\u00ed p\u0159ipojen\u00ed na internetu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Spole\u010dnost Cloudflare <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.cloudflare.com\/how-verizon-and-a-bgp-optimizer-knocked-large-parts-of-the-internet-offline-today\/\">publikovala<\/a><\/noindex> zpr\u00e1va o v\u010derej\u0161\u00edm incidentu, kter\u00fd zp\u016fsobil <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/bgpmon\/status\/1143149817473847296\">t\u0159i hodiny<\/a><\/noindex> od 13:34 do 16:26 (MSK) byly pozorov\u00e1ny probl\u00e9my s p\u0159\u00edstupem k mnoha zdroj\u016fm na glob\u00e1ln\u00ed s\u00edti, v\u010detn\u011b infrastruktury Cloudflare, Facebooku, Akamai, Apple, Linode a Amazon AWS. Probl\u00e9my v infrastruktu\u0159e Cloudflare, kter\u00e1 poskytuje CDN pro 16 milion\u016f webov\u00fdch str\u00e1nek, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.cloudflarestatus.com\/incidents\/46z55mdhg0t5\">byly pozorov\u00e1ny<\/a><\/noindex> od 14:02 do 16:02 (MSK). Podle odhad\u016f Cloudflare byla b\u011bhem v\u00fdpadku zaznamen\u00e1na ztr\u00e1ta p\u0159ibli\u017en\u011b 15 % glob\u00e1ln\u00edho provozu. <\/p>\n<p>Probl\u00e9m byl <noindex><a rel=\"nofollow\" href=\"https:\/\/mailman.nanog.org\/pipermail\/nanog\/2019-June\/101590.html\">byl zp\u016fsoben<\/a><\/noindex> unikl\u00fdmi trasami p\u0159es BGP, b\u011bhem n\u00ed\u017e bylo nespr\u00e1vn\u011b p\u0159esm\u011brov\u00e1no p\u0159ibli\u017en\u011b 20 tis\u00edc prefix\u016f pro 2400 s\u00edt\u00ed. Zdrojem \u00faniku byl poskytovatel DQE Communications, kter\u00fd pou\u017e\u00edval software <noindex><a rel=\"nofollow\" href=\"https:\/\/www.noction.com\/intelligent_routing_platform\/traffic-routing-optimization\">BGP Optimizer<\/a><\/noindex> pro optimalizaci sm\u011brov\u00e1n\u00ed. BGP Optimizer rozd\u011bluje IP prefixy na men\u0161\u00ed, nap\u0159\u00edklad d\u011bl\u00ed 104.20.0.0\/20 na 104.20.0.0\/21 a 104.20.8.0\/21, a n\u00e1sledn\u011b DQE Communications udr\u017eoval na sv\u00e9 stran\u011b velk\u00e9 mno\u017estv\u00ed specifick\u00fdch tras, kter\u00e9 p\u0159episovaly obecn\u011bj\u0161\u00ed trasy (tj. m\u00edsto obecn\u00fdch tras k Cloudflare byly pou\u017eity detailn\u011bj\u0161\u00ed trasy k jednotliv\u00fdm pods\u00edt\u00edm Cloudflare).<\/p>\n<p>Tyto konkr\u00e9tn\u00ed trasy byly ozn\u00e1meny jednomu z klient\u016f (Allegheny Technologies, AS396531), kter\u00fd m\u011bl tak\u00e9 p\u0159ipojen\u00ed p\u0159es jin\u00e9ho poskytovatele. Allegheny Technologies p\u0159esm\u011broval obdr\u017een\u00e9 trasy dal\u0161\u00edmu tranzitn\u00edmu poskytovateli (Verizon, AS701). Vzhledem k absenci \u0159\u00e1dn\u00e9ho filtrov\u00e1n\u00ed BGP ozn\u00e1men\u00ed a omezen\u00ed po\u010dtu prefix\u016f, Verizon p\u0159ijal toto ozn\u00e1men\u00ed a p\u0159esm\u011broval obdr\u017een\u00fdch 20 tis\u00edc prefix\u016f do zbytku internetu. Nespr\u00e1vn\u00e9 prefixy kv\u016fli sv\u00e9 granularit\u011b byly vn\u00edm\u00e1ny jako prioritn\u011bj\u0161\u00ed, jeliko\u017e konkr\u00e9tn\u00ed trasa m\u00e1 vy\u0161\u0161\u00ed prioritu ne\u017e obecn\u00e1. <\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/blog.cloudflare.com\/content\/images\/2019\/06\/leak2-2.png\"><img decoding=\"async\" alt=\"\u00danik BGP tras vedl k masov\u00e9mu naru\u0161en\u00ed p\u0159ipojen\u00ed na internetu\" src=\"\/wp-content\/uploads\/2019\/06\/7b91b949afde7526f989c00666f7fee0.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>V d\u016fsledku toho byl provoz pro mnoho v\u011bt\u0161\u00edch s\u00edt\u00ed sm\u011brov\u00e1n p\u0159es Verizon k mal\u00e9mu poskytovateli DQE Communications, kter\u00fd nebyl schopen zpracovat p\u0159\u00edlivov\u00fd tok, co\u017e vedlo k kolapsu (efekt je srovnateln\u00fd s t\u00edm, jako by \u010d\u00e1st p\u0159epln\u011bn\u00e9 d\u00e1lnice byla nahrazena poln\u00ed cestou).  <\/p>\n<p>Aby se p\u0159ede\u0161lo vzniku podobn\u00fdch incident\u016f v budoucnu<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/mailman.nanog.org\/pipermail\/nanog\/2019-June\/101589.html\">doporu\u010deno<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> Pou\u017e\u00edt <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47303\">ov\u011b\u0159ov\u00e1n\u00ed<\/a><\/noindex> ozn\u00e1men\u00ed na z\u00e1klad\u011b RPKI (BGP Origin Validation, co\u017e umo\u017e\u0148uje p\u0159ij\u00edmat ozn\u00e1men\u00ed pouze od vlastn\u00edk\u016f s\u00edt\u011b);\n<li class=\"l\"> Omezit maxim\u00e1ln\u00ed po\u010det p\u0159ij\u00edman\u00fdch prefix\u016f pro v\u0161echny relace EBGP (nastaven\u00ed maximum-prefix by pomohlo ihned vy\u0159adit p\u0159enos 20 tis\u00edc prefix\u016f v r\u00e1mci jedn\u00e9 relace);\n<li class=\"l\"> Pou\u017e\u00edvejte filtrov\u00e1n\u00ed na z\u00e1klad\u011b registru IRR (Internet Routing Registry, ur\u010duje AS, p\u0159es kter\u00e9 je povoleno sm\u011brov\u00e1n\u00ed dan\u00fdch prefix\u016f);\n<li class=\"l\"> Pou\u017eijte na sm\u011brova\u010d\u00edch doporu\u010den\u00e1 nastaven\u00ed v RFC 8212 pro v\u00fdchoz\u00ed blokov\u00e1n\u00ed ('default deny');\n<li class=\"l\"> P\u0159esta\u0148te neopatrn\u011b pou\u017e\u00edvat optimaliz\u00e1tory BGP.\n<\/ul>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/blog.cloudflare.com\/content\/images\/2019\/06\/leak3-2.png\"><img decoding=\"async\" alt=\"\u00danik BGP tras vedl k masov\u00e9mu naru\u0161en\u00ed p\u0159ipojen\u00ed na internetu\" src=\"\/wp-content\/uploads\/2019\/06\/2b2bb1fe713ee9e87987f57920116943.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50955\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Cloudflare \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u043e\u0442\u0447\u0451\u0442 \u043e \u0432\u0447\u0435\u0440\u0430\u0448\u043d\u0435\u043c \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0435, \u0432 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u043d\u0430 \u043f\u0440\u043e\u0442\u044f\u0436\u0435\u043d\u0438\u0438 \u0442\u0440\u0451\u0445 \u0447\u0430\u0441\u043e\u0432 \u0441 13:34 \u0434\u043e 16:26 (MSK) \u043d\u0430\u0431\u043b\u044e\u0434\u0430\u043b\u0438\u0441\u044c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441 \u0434\u043e\u0441\u0442\u0443\u043f\u043e\u043c \u043a\u043e \u043c\u043d\u043e\u0433\u0438\u043c \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c \u0432 \u0433\u043b\u043e\u0431\u0430\u043b\u044c\u043d\u043e\u0439 \u0441\u0435\u0442\u0438, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0443 Cloudflare, Facebook, Akamai, Apple, Linode \u0438 Amazon AWS. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432 \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0435 Cloudflare, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 CDN \u0434\u043b\u044f 16 \u043c\u043b\u043d \u0441\u0430\u0439\u0442\u043e\u0432, \u043d\u0430\u0431\u043b\u044e\u0434\u0430\u043b\u0438\u0441\u044c \u0441 14:02 \u0434\u043e 16:02 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":26701,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-35641","post","type-post","status-publish","format-standard","has-post-thumbnail","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=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Cloudflare \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u043e\u0442\u0447\u0451\u0442 \u043e \u0432\u0447\u0435\u0440\u0430\u0448\u043d\u0435\u043c.\" \/>\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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