{"id":92230,"date":"2020-08-24T19:42:19","date_gmt":"2020-08-24T17:42:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/pochti-polovina-trafika-na-kornevye-dns-servery-vyzvana-aktivnostyu-chromium"},"modified":"2020-08-24T19:42:19","modified_gmt":"2020-08-24T17:42:19","slug":"pochti-polovina-trafika-na-kornevye-dns-servery-vyzvana-aktivnostyu-chromium","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/pochti-polovina-trafika-na-kornevye-dns-servery-vyzvana-aktivnostyu-chromium","title":{"rendered":"Peaaegu pool liiklusest juurdns-serveritele on p\u00f5hjustatud Chromiumi tegevusest","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

APNIC, Aasia ja Vaikse ookeani piirkonna IP-aadresside jagamise registrator, avaldas<\/a><\/noindex> anal\u00fc\u00fcsi tulemused liikluse jaotusest \u00fchel juurdns-serverist a.root-servers.net. 45,80% p\u00e4ringutest juurdserveri suunas osutus seotud Chromiumi p\u00f5hja liikuvate brauserite kontrollidega. Seega l\u00e4heb peaaegu pool juurdns-serverite ressurssidest Chromiumi diagnostiliste kontrollide teostamiseks, mitte DNS-serveritelt p\u00e4ringute t\u00f6\u00f6tlemiseks juurealasid m\u00e4\u00e4ratledes. Arvestades, et Chrome'i turuosa on 70%, p\u00f5hjustab selline diagnostiline aktiivsus umbkaudu 60 miljardit p\u00e4ringut juurdserveritele p\u00e4evas.<\/p>\n

Diagnostilised kontrollid kasutatakse Chromiumis teenusepakkujate tegevuse m\u00e4\u00e4ratlemiseks, kes suunavad p\u00e4ringud mitteeksisteerivatele nimedele oma t\u00f6\u00f6tlejatesse. Sarnased s\u00fcsteemid on m\u00f5ned teenusepakkujad rakendanud, et suunata omakorda liiklust valesti kirjutatud domeeninimedele \u2014 tavaliselt kuvatakse mitteeksisteerivate domeenide puhul veateated, kus pakutakse \u00f5igete nimede loendit ja reklaame. Selline tegevus h\u00e4irib t\u00e4ielikult brauseri intranet-hostide m\u00e4\u00e4ratlemise loogikat.<\/p>\n

Otsingup\u00e4ringut t\u00f6\u00f6tledes, kui aadressiribale on sisestatud ainult \u00fches\u00f5naline p\u00e4ring, proovib brauser esmalt katsetada<\/a><\/noindex> m\u00e4\u00e4ra see s\u00f5na DNS-is, eeldades, et kasutaja v\u00f5ib p\u00fc\u00fcda p\u00f6\u00f6rduda intraneti veebisaidi poole sisev\u00f5rgus, mitte saata p\u00e4ringut otsingumootorile. Kui teenusepakkuja suunab mitteeksisteerivate domeeninimede p\u00e4ringud enda poole, on kasutajatel probleem \u2014 \u00fche s\u00f5na otsingup\u00e4ringud, mis on sisestatud aadressiribale, hakkavad suunama teenusepakkuja lehtedele, mitte otsingumootorisse.<\/p>\n

Probleemi lahendamiseks on Chromiumi arendajad lisanud brauserisse t\u00e4iendavad kontrollid<\/a><\/noindex>, mis tuvastades suunamisi muudavad aadressiribal p\u00e4ringute t\u00f6\u00f6tlemise loogikat.
\nIga kord, kui k\u00e4ivitatakse, muudetakse DNS-i seadeid v\u00f5i vahetatakse IP-aadressi, saadab brauser kolm DNS-p\u00e4ringut juhuslike esmaklassiliste domeeninimedega, mis t\u00f5en\u00e4oliselt ei eksisteeri. Nimed sisaldavad 7 kuni 15 ladina t\u00e4hte (ilma punktideta) ja neid kasutatakse, et tuvastada, kuidas teenusepakkuja suunab mitteeksisteerivad domeeninimed oma hostimisele. Kui kolme juhuslikult valitud nime HTTP-p\u00e4ringu t\u00f6\u00f6tlemise k\u00e4igus kahe puhul suunatakse samale lehele, peab Chromium, et kasutaja on suunatud kolmandale osapoole lehele.<\/p>\n

Chromiumi aktiivsuse eristamiseks \u00fclekandevoogudes juurd DNS-serveris kasutati ebatavalisi esmaklassiliste domeenide suurusi (7 kuni 15 t\u00e4hte) ja p\u00e4ringute kordumise faktorit (nimed genereeriti iga kord juhuslikult ja ei kordunud).
\nAlguses filtreeriti logis v\u00e4lja mitteeksisteerivate domeenide p\u00e4ringud (78,09%), seej\u00e4rel eraldati kolm korda korduvad p\u00e4ringud (51,41%) ja l\u00f5puks filtreeriti domeenid, mis sisaldavad 7 kuni 15 t\u00e4hte (45,80%). Huvi pakub, et ainult 21,91% p\u00e4ringutest juurserveritele osutus seotud eksisteerivate domeenide m\u00e4\u00e4ratlemisega.<\/p>\n

\"Peaaegu<\/a><\/noindex><\/center><\/p>\n

Uuringu k\u00e4igus uuriti ka juurserverite a.root-servers.net ja j.root-servers.net koormuse kasvu s\u00f5ltuvust Chrome'i populaarsuse t\u00f5usust.<\/p>\n

\"Peaaegu<\/a><\/noindex><\/center><\/p>\n

Firefoxis piiratakse \u00fcmber suunamise kontrollimist DNS-iga piirangutega<\/a><\/noindex> \u00fcmber suunamise m\u00e4\u00e4ramisega autentimiselehtedele (captive portal) ja on rakendatud<\/a><\/noindex> koos kasutades<\/a><\/noindex> fikseeritud alamdomeenile \u00abdetectportal.firefox.com\u00bb, ilma esimese taseme domeeninimede p\u00e4ringuta. Selline k\u00e4itumine ei suurenda t\u00e4iendavat koormust juurdomeeni DNS-serveritele, kuid v\u00f5ib potentsiaalselt t\u00f5lgendada<\/a><\/noindex> tekitada kasutaja IP-aadressi konfidentsiaalsete andmete lekke (iga k\u00e4ivitamise korral k\u00fcsitakse lehte \u00abdetectportal.firefox.com\/success.txt\u00bb). Firefoxis on kontrollimise v\u00e4ljal\u00fclitamiseks seadistus \u00abnetwork.captive-portal-service.enabled\u00bb, mida saab muuta lehelt \u00ababout:config\u00bb.<\/p>\n

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

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

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\u043a\u043e\u0440\u043d\u0435\u0432\u043e\u043c\u0443 \u0441\u0435\u0440\u0432\u0435\u0440\u0443 \u043e\u043a\u0430\u0437\u0430\u043b\u0438\u0441\u044c \u0441\u0432\u044f\u0437\u0430\u043d\u044b \u0441 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430\u043c\u0438, \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u043c\u0438 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430\u043c\u0438 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u0434\u0432\u0438\u0436\u043a\u0430 Chromium. \u0422\u0430\u043a\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c, \u043f\u043e\u0447\u0442\u0438 \u043f\u043e\u043b\u043e\u0432\u0438\u043d\u0430 \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432 \u043a\u043e\u0440\u043d\u0435\u0432\u044b\u0445 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u0443\u0445\u043e\u0434\u0438\u0442 \u043d\u0430 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0434\u0438\u0430\u0433\u043d\u043e\u0441\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0432\u0435\u0440\u043e\u043a Chromium, \u0430 \u043d\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0443 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043e\u0442 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u043f\u0440\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":92231,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-92230","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\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\n","aioseo_head_json":{"title":"\ud83e\udd47Peaaegu pool p\u00f5hiserverite liiklusest on 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