{"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\/hu\/blog\/news\/utechka-bgp-marshrutov-privela-k-massovomu-narusheniyu-svyaznosti-v-internete","title":{"rendered":"A BGP-route-ki\u00e1raml\u00e1s t\u00f6meges internetkapcsolati probl\u00e9m\u00e1kat okozott.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A Cloudflare v\u00e1llalat <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.cloudflare.com\/how-verizon-and-a-bgp-optimizer-knocked-large-parts-of-the-internet-offline-today\/\">kiadta<\/a><\/noindex> jelent\u00e9s a tegnapi incidenst k\u00f6vet\u0151en, amelynek k\u00f6vetkezt\u00e9ben <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/bgpmon\/status\/1143149817473847296\">h\u00e1rom \u00f3r\u00e1n \u00e1t<\/a><\/noindex> 13:34 \u00e9s 16:26 (MSK) k\u00f6z\u00f6tt hozz\u00e1f\u00e9r\u00e9si probl\u00e9m\u00e1k mer\u00fcltek fel sok glob\u00e1lis forr\u00e1shoz, bele\u00e9rtve a Cloudflare, Facebook, Akamai, Apple, Linode \u00e9s Amazon AWS infrastrukt\u00far\u00e1j\u00e1t. A Cloudflare infrastrukt\u00far\u00e1j\u00e1ban, amely 16 milli\u00f3 webhely sz\u00e1m\u00e1ra biztos\u00edt CDN-t, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.cloudflarestatus.com\/incidents\/46z55mdhg0t5\">probl\u00e9m\u00e1k jelentkeztek<\/a><\/noindex> 14:02 \u00e9s 16:02 (MSK) k\u00f6z\u00f6tt. A Cloudflare becsl\u00e9se szerint a hiba idej\u00e9n k\u00f6r\u00fclbel\u00fcl 15%-os glob\u00e1lis forgalomcs\u00f6kken\u00e9s t\u00f6rt\u00e9nt. <\/p>\n<p>A probl\u00e9ma <noindex><a rel=\"nofollow\" href=\"https:\/\/mailman.nanog.org\/pipermail\/nanog\/2019-June\/101590.html\">is caused by<\/a><\/noindex> \u00fatvonalak kisziv\u00e1rg\u00e1s\u00e1val f\u00fcgg\u00f6tt \u00f6ssze a BGP-n kereszt\u00fcl, amely sor\u00e1n k\u00f6r\u00fclbel\u00fcl 20 ezer prefixet ir\u00e1ny\u00edtottak t\u00e9vesen 2400 h\u00e1l\u00f3zat sz\u00e1m\u00e1ra. A kisziv\u00e1rg\u00e1s forr\u00e1sa a DQE Communications szolg\u00e1ltat\u00f3 volt, amely <noindex><a rel=\"nofollow\" href=\"https:\/\/www.noction.com\/intelligent_routing_platform\/traffic-routing-optimization\">BGP Optimizer<\/a><\/noindex> szoftvert haszn\u00e1lt az \u00fatvonalak optimaliz\u00e1l\u00e1s\u00e1ra. A BGP Optimizer az IP-prefixeket kisebb egys\u00e9gekre bontja, p\u00e9ld\u00e1ul a 104.20.0.0\/20-prefixet 104.20.0.0\/21 \u00e9s 104.20.8.0\/21 r\u00e9szekre, \u00edgy a DQE Communications nagy sz\u00e1m\u00fa specifikus \u00fatvonalat tartott a saj\u00e1t oldal\u00e1n, amelyek fel\u00fclb\u00edr\u00e1lj\u00e1k az \u00e1ltal\u00e1nos \u00fatvonalakat (teh\u00e1t a Cloudflare \u00e1ltal\u00e1nos \u00fatvonalai helyett konkr\u00e9tabb \u00fatvonalakat haszn\u00e1ltak a Cloudflare specifikus alh\u00e1l\u00f3zataihoz).<\/p>\n<p>Ezeket a konkr\u00e9t \u00fatvonalakat bejelentett\u00e9k egy \u00fcgyf\u00e9lnek (Allegheny Technologies, AS396531), amely szint\u00e9n kapcsolatban \u00e1llt egy m\u00e1sik szolg\u00e1ltat\u00f3val. Az Allegheny Technologies a kapott \u00fatvonalakat egy m\u00e1sik tranzit szolg\u00e1ltat\u00f3nak (Verizon, AS701) tov\u00e1bb\u00edtotta. A BGP-bejelent\u00e9sek megfelel\u0151 sz\u0171r\u00e9s\u00e9nek hi\u00e1nya \u00e9s a prefixek sz\u00e1m\u00e1nak limit\u00e1ci\u00f3ja miatt a Verizon felkapta ezt a bejelent\u00e9st \u00e9s tov\u00e1bb\u00edtotta a kapott 20 ezer prefixet a t\u00f6bbi internet sz\u00e1m\u00e1ra. A t\u00e9ves prefixek a granularit\u00e1suk folyt\u00e1n prioriz\u00e1lva lettek, mivel a konkr\u00e9t \u00fatvonal magasabb priorit\u00e1ssal b\u00edr, mint az \u00e1ltal\u00e1nos. <\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/blog.cloudflare.com\/content\/images\/2019\/06\/leak2-2.png\"><img decoding=\"async\" alt=\"A BGP-route-ki\u00e1raml\u00e1s t\u00f6meges internetkapcsolati probl\u00e9m\u00e1kat okozott.\" src=\"\/wp-content\/uploads\/2019\/06\/7b91b949afde7526f989c00666f7fee0.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Ennek k\u00f6vetkezt\u00e9ben sok nagy h\u00e1l\u00f3zat forgalma a Verizonon kereszt\u00fcl egy kisebb szolg\u00e1ltat\u00f3hoz, a DQE Communications-hez ir\u00e1nyult, amely nem tudta kezelni a hirtelen megn\u00f6vekedett forgalmat, ami \u00f6sszeoml\u00e1shoz vezetett (a hat\u00e1s hasonl\u00edthat\u00f3 azzal, mintha egy zs\u00fafolt aut\u00f3p\u00e1lya egy darabj\u00e1t f\u00f6ld\u00fatra cser\u00e9ln\u00e9nk).  <\/p>\n<p>A hasonl\u00f3 incidenst el\u0151z\u00e9se \u00e9rdek\u00e9ben a j\u00f6v\u0151ben<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/mailman.nanog.org\/pipermail\/nanog\/2019-June\/101589.html\">aj\u00e1nlott<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> Haszn\u00e1lja a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47303\">a bejelent\u00e9sek valid\u00e1l\u00e1sa<\/a><\/noindex> RPKI alap\u00fa valid\u00e1l\u00e1ssal (BGP Origin Validation, enged\u00e9lyezi csak a h\u00e1l\u00f3zati tulajdonosokt\u00f3l \u00e9rkez\u0151 bejelent\u00e9seket);\n<li class=\"l\"> A maxim\u00e1lisan elfogadhat\u00f3 prefixek sz\u00e1m\u00e1nak korl\u00e1toz\u00e1sa minden EBGP \u00fcl\u00e9shez (a maximum-prefix be\u00e1ll\u00edt\u00e1s azonnal seg\u00edtene kisz\u0171rni a 20 ezer prefixet egy \u00fcl\u00e9sszak alatt);\n<li class=\"l\"> Alkalmazza az IRR (Internet Routing Registry) nyilv\u00e1ntart\u00e1s alap\u00fa sz\u0171r\u00e9st, amely meghat\u00e1rozza az AS-t, amelyeken kereszt\u00fcl a megadott prefixek routol\u00e1sa enged\u00e9lyezett;\n<li class=\"l\"> Haszn\u00e1lja a RFC 8212-ben javasolt be\u00e1ll\u00edt\u00e1sokat a routereken az alap\u00e9rtelmezett blokkol\u00e1s (&#8216;default deny&#8217;) \u00e9rdek\u00e9ben;\n<li class=\"l\"> A BGP optimaliz\u00e1l\u00f3k meggondolatlan haszn\u00e1lat\u00e1nak mell\u0151z\u00e9se.\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=\"A BGP-route-ki\u00e1raml\u00e1s t\u00f6meges internetkapcsolati probl\u00e9m\u00e1kat okozott.\" 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>Forr\u00e1s: <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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