{"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 kogu liiklusest juur DNS-serveritesse tuleneb Chromiumi tegevusest","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

APNIC registreerija, kes vastutab IP-aadresside jaotamise eest Aasia ja Vaikse ookeani piirkonnas, avalikustas<\/a><\/noindex> trafiku jaotamise anal\u00fc\u00fcsi tulemused \u00fchelt juurdns-serverilt a.root-servers.net. 45,80% p\u00e4ringutest juurdns-serverile seondub Chrominumile p\u00f5hinevate brauserite tekeetud kontrollidega. Nii et peaaegu pool juurdns-serverite ressursse l\u00e4heb Chrominumin diagnostiliste kontrollide tegemiseks, mitte DNS-serverite p\u00e4ringute t\u00f6\u00f6tlemiseks juurdomeenide m\u00e4\u00e4ramisel. Arvestades, et Chrome omab 70% veebibrauserite turuosast, toob selline diagnostiline tegevus kaasa umbes 60 miljardit p\u00e4ringut juurdns-serveritele p\u00e4evas.<\/p>\n

Diagnostilised kontrollid kasutatakse Chromes, et tuvastada, kuidas teenusepakkujad suunavad p\u00e4ringud mitteeksisteerivale nimele oma t\u00f6\u00f6tlejatele. Selliseid s\u00fcsteeme kasutavad m\u00f5ned teenusepakkujad, et suunata vale sisestatud domeeninimede liik oma suunas \u2014 tavaliselt kuvavad mitteeksisteerivate domeenide jaoks vigade eest hoiatavad lehed, nimekirja t\u00f5en\u00e4oliselt \u00f5igetest nimedest ja reklaame. Selline tegevus h\u00e4irib t\u00e4ielikult brauseris intraneti hostide m\u00e4\u00e4ratlemise loogikat.<\/p>\n

Otsingup\u00e4ringu t\u00f6\u00f6tlemisel, kui aadressiribale on sisestatud ainult \u00fcks s\u00f5na ilma punktideta, brauser k\u00f5igepealt arvata<\/a><\/noindex> kindlaks teha kui see s\u00f5na on DNS-is, eeldades, et kasutaja v\u00f5ib proovida ligi p\u00e4\u00e4seda intraneti veebisaidile sisev\u00f5rgus, mitte ei edasta p\u00e4ringut otsingumootorile. Kui teenusepakkuja suunab mitteeksisteerivate domeeninimede p\u00e4ringud enda suunas, tekib kasutajatel probleem \u2014 k\u00f5ik \u00fche s\u00f5naga otsingup\u00e4ringud, sisestatud aadressiribal, hakkavad suunama teenusepakkuja lehtedele, mitte otsingumootorisse.<\/p>\n

Probleemi lahendamiseks lisasid Chrominumi arendajad brauserisse t\u00e4iendavad kontrollid<\/a><\/noindex>, mis tuvastades suunamisi muudavad aadressiriba p\u00e4ringute t\u00f6\u00f6tlemise loogikat.
\nIga k\u00e4ivitamisel, DNS-seadete muutmisel v\u00f5i IP-aadressi vahetamisel saadab brauser kolme DNS-p\u00e4ringut, kus on juhuslikud esimese taseme domeeninimed, mis t\u00f5en\u00e4oliselt ei eksisteeri. Nimed sisaldavad 7\u201315 ladina t\u00e4hte (ilma punktideta) ja neid kasutatakse, et tuvastada olemasolevate domeeninimede suunamine teenusepakkuja poolt oma hostimisele. Kui kolme HTTP-p\u00e4ringu t\u00f6\u00f6tlemise k\u00e4igus juhuslike nimedega kahte neist suunatakse sama lehe suunas, peab Chromium seda kasutaja suunamiseks teisele lehele.<\/p>\n

Chromium'i tegevuse eristamiseks tavalisest p\u00e4ringute voost juurdu DNS-serveris kasutati ebatavalisi esimesel tasemel domeeni suurusi (7\u201315 t\u00e4hte) ja p\u00e4ringute kordumise faktorit (nimed genereeriti iga kord juhuslikult ega kordunud).
\nLogis filtreeriti esiteks v\u00e4lja mitteeksisteerivate domeenide p\u00e4ringud (78,09%), seej\u00e4rel tuvastati p\u00e4ringud, mis kordusid mitte rohkem kui kolm korda (51,41%), ning seej\u00e4rel filtreeriti domeenid, mis sisaldasid 7\u201315 t\u00e4hte (45,80%). Huvitav on, et ainult 21,91% p\u00e4ringutest juurdserveritele seondusid olemasolevate domeenide m\u00e4\u00e4ratlemisega.<\/p>\n

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

Uuringu k\u00e4igus uuriti ka juurdserverite a.root-servers.net ja j.root-servers.net koormuse kasvu s\u00f5ltuvust Chrome'i populaarsuse kasvust.<\/p>\n

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

Firefoxis piiratakse DNS kaudu suunamis\u00fclevaatusi piiratud<\/a><\/noindex> autentimislehtede (captive portal) suunamise m\u00e4\u00e4ramisega ja on ellu viidud<\/a><\/noindex> jot kasutatava<\/a><\/noindex> fikseeritud alamdomeen \u00abdetectportal.firefox.com\u00bb, ilma esimese taseme domeenide p\u00e4ringuta. Selline k\u00e4itumine ei p\u00f5hjusta t\u00e4iendavat koormust juured DNS-serveritele, kuid v\u00f5ib potentsiaalselt t\u00f5lgendada<\/a><\/noindex> nagu kasutaja IP-aadressi konfidentsiaalsete andmete leke (iga kord k\u00e4ivitamisel k\u00fcsitakse lehte \u00abdetectportal.firefox.com\/success.txt\u00bb). Firefoxis on kontrollimise v\u00e4ljal\u00fclitamiseks ette n\u00e4htud seade \u00abnetwork.captive-portal-service.enabled\u00bb, mida saab muuta lehek\u00fcljel \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":"

\u0420\u0435\u0433\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440 APNIC, \u043e\u0442\u0432\u0435\u0447\u0430\u044e\u0449\u0438\u0439 \u0437\u0430 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 IP-\u0430\u0434\u0440\u0435\u0441\u043e\u0432 \u0432 \u0410\u0437\u0438\u0430\u0442\u0441\u043a\u043e-\u0422\u0438\u0445\u043e\u043e\u043a\u0435\u0430\u043d\u0441\u043a\u043e\u043c \u0440\u0435\u0433\u0438\u043e\u043d\u0435, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0430\u043d\u0430\u043b\u0438\u0437\u0430 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u043d\u0430 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 \u043a\u043e\u0440\u043d\u0435\u0432\u044b\u0445 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 a.root-servers.net. 45.80% \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043a \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 pooled juurd DNS-serverite liiklusest 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