{"id":38121,"date":"2019-10-31T22:21:46","date_gmt":"2019-10-31T19:21:46","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-chrome-78-nachnutsya-eksperimenty-s-vklyucheniem-dns-over-https\/"},"modified":"2019-10-31T22:21:46","modified_gmt":"2019-10-31T19:21:46","slug":"v-chrome-78-nachnutsya-eksperimenty-s-vklyucheniem-dns-over-https","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-chrome-78-nachnutsya-eksperimenty-s-vklyucheniem-dns-over-https","title":{"rendered":"V Chrome 78 za\u010dnou experimenty s aktivac\u00ed DNS-over-HTTPS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

N\u00e1sledn\u011b Mozilla<\/a><\/noindex> spole\u010dnost Google ozn\u00e1mila<\/a><\/noindex> o z\u00e1m\u011bru prov\u00e9st experiment za \u00fa\u010delem ov\u011b\u0159en\u00ed vyv\u00edjen\u00e9 implementace «DNS p\u0159es HTTPS» (DoH, DNS over HTTPS) pro prohl\u00ed\u017ee\u010d Chrome. V vyd\u00e1n\u00ed Chrome 78, pl\u00e1novan\u00e9m na 22. \u0159\u00edjna, budou n\u011bkter\u00e9 kategorie u\u017eivatel\u016f m\u00edt tuto funkci ve v\u00fdchoz\u00edm nastaven\u00ed p\u0159evedena<\/a><\/noindex> na pou\u017e\u00edv\u00e1n\u00ed DoH. Do experimentu zapoj\u00ed pouze u\u017eivatele, jejich\u017e syst\u00e9mov\u00e1 nastaven\u00ed obsahuj\u00ed ur\u010dit\u00e9 DNS poskytovatele, kte\u0159\u00ed jsou uzn\u00e1ni jako kompatibiln\u00ed s DoH. <\/p>\n

Na whitelist DNS poskytovatel\u016f byly za\u0159azeny slu\u017eby<\/a><\/noindex> Google (8.8.8.8, 8.8.4.4), Cloudflare (1.1.1.1, 1.0.0.1), OpenDNS (208.67.222.222, 208.67.220.220), Quad9 (9.9.9.9, 149.112.112.112), Cleanbrowsing (185.228.168.168, 185.228.169.168) a DNS.SB (185.222.222.222, 185.184.222.222). Pokud bude v u\u017eivatelsk\u00fdch nastaven\u00edch DNS uveden n\u011bkter\u00fd z v\u00fd\u0161e zm\u00edn\u011bn\u00fdch DNS server\u016f, DoH bude v Chromu aktivov\u00e1n automaticky. Pro ty, kte\u0159\u00ed pou\u017e\u00edvaj\u00ed DNS servery poskytovan\u00e9 m\u00edstn\u00edm internetov\u00fdm poskytovatelem, z\u016fstanou v\u011bci beze zm\u011bny a pro dotazy DNS se i nad\u00e1le pou\u017eije syst\u00e9mov\u00fd resolver. <\/p>\n

D\u016fle\u017eit\u00fdm rozd\u00edlem ve srovn\u00e1n\u00ed s implementac\u00ed DoH ve Firefoxu, kde se automatick\u00e9 zapnut\u00ed DoH za\u010dne<\/a><\/noindex> ji\u017e koncem z\u00e1\u0159\u00ed, je absence vazby na jeden poskytovatel DoH. Zat\u00edmco ve Firefoxu je v\u00fdchoz\u00ed se pou\u017e\u00edv\u00e1<\/a><\/noindex> DNS server CloudFlare, v Chromu bude pouze aktualizov\u00e1n zp\u016fsob pr\u00e1ce s DNS na ekvivalentn\u00ed slu\u017ebu, bez zm\u011bny DNS poskytovatele. Nap\u0159\u00edklad, pokud m\u00e1 u\u017eivatel v syst\u00e9mov\u00fdch nastaven\u00edch uveden DNS 8.8.8.8, bude v Chromu aktivov\u00e1n<\/a><\/noindex> DoH slu\u017eba Google («https:\/\/dns.google.com\/dns-query»), pokud je DNS — 1.1.1.1, pak DoH slu\u017eba Cloudflare («https:\/\/cloudflare-dns.com\/dns-query») a t.p.<\/a><\/noindex><\/p>\n

u\u017eivatel si bude moci voln\u011b zapnout nebo vypnout DoH pomoc\u00ed nastaven\u00ed «chrome:\/\/flags\/#dns-over-https». Podporov\u00e1ny jsou t\u0159i re\u017eimy provozu «secure», «automatic» a «off». V re\u017eimu «secure» se hostitel\u00e9 ur\u010duj\u00ed pouze na z\u00e1klad\u011b d\u0159\u00edve ulo\u017een\u00fdch bezpe\u010dn\u00fdch hodnot (z\u00edskan\u00fdch prost\u0159ednictv\u00edm zabezpe\u010den\u00e9ho spojen\u00ed) a dotaz\u016f p\u0159es DoH, n\u00e1vrat k b\u011b\u017en\u00e9mu DNS se nepou\u017e\u00edv\u00e1. V re\u017eimu «automatic» pokud DoH a chr\u00e1n\u011bn\u00e1 cache nejsou dostupn\u00e9, je povoleno z\u00edsk\u00e1v\u00e1n\u00ed dat z nezabezpe\u010den\u00e9 cache a p\u0159\u00edstup prost\u0159ednictv\u00edm tradi\u010dn\u00edho DNS. V re\u017eimu «off» se nejprve zkontroluje obecn\u00e1 cache a pokud nejsou data k dispozici, dotaz se ode\u0161le prost\u0159ednictv\u00edm syst\u00e9mov\u00e9ho DNS. Re\u017eim se nastavuje p\u0159es nastaven\u00ed<\/a><\/noindex> kDnsOverHttpsMode, a \u0161ablona porovn\u00e1n\u00ed server\u016f pomoc\u00ed kDnsOverHttpsTemplates.<\/p>\n

Experiment s aktivac\u00ed DoH bude proveden na v\u0161ech podporovan\u00fdch platform\u00e1ch v Chromu s v\u00fdjimkou Linuxu a iOS, a to kv\u016fli slo\u017eitosti anal\u00fdzy nastaven\u00ed resolveru a omezen\u00e9mu p\u0159\u00edstupu k syst\u00e9mov\u00fdm nastaven\u00edm DNS. V p\u0159\u00edpad\u011b, \u017ee po aktivaci DoH dojde k probl\u00e9m\u016fm p\u0159i odes\u00edl\u00e1n\u00ed po\u017eadavk\u016f na server DoH (nap\u0159\u00edklad kv\u016fli jeho blokaci, poru\u0161e s\u00ed\u0165ov\u00e9ho p\u0159ipojen\u00ed nebo v\u00fdpadku), prohl\u00ed\u017ee\u010d automaticky vr\u00e1t\u00ed syst\u00e9mov\u00e1 nastaven\u00ed DNS. <\/p>\n

C\u00edlem experimentu je fin\u00e1ln\u00ed ov\u011b\u0159en\u00ed implementace DoH a zkoum\u00e1n\u00ed vlivu pou\u017eit\u00ed DoH na v\u00fdkon. Je t\u0159eba poznamenat, \u017ee podpora DoH byla v k\u00f3dov\u00e9 z\u00e1kladn\u011b Chromu zavedena ji\u017e v \u00fanoru, av\u0161ak pro nastaven\u00ed a aktivaci DoH byla p\u0159id\u00e1na<\/a><\/noindex> bylo t\u0159eba spustit Chrome se speci\u00e1ln\u00edmi parametry a slo\u017eitou sadou voleb.<\/a><\/noindex> spu\u0161t\u011bn\u00ed Chromu se speci\u00e1ln\u00edmi flagy a netrivi\u00e1ln\u00edm souborem voleb.<\/p>\n

P\u0159ipom\u00edn\u00e1me, \u017ee DoH m\u016f\u017ee b\u00fdt u\u017eite\u010dn\u00fd pro vylou\u010den\u00ed \u00fanik\u016f informac\u00ed o po\u017eadovan\u00fdch n\u00e1zvech hostitel\u016f p\u0159es DNS servery poskytovatel\u016f, boj proti MITM \u00fatok\u016fm a podvrh\u016fm DNS provozu (nap\u0159\u00edklad p\u0159i p\u0159ipojen\u00ed k ve\u0159ejn\u00fdm Wi-Fi), \u010delen\u00ed blokac\u00edm na \u00farovni DNS (DoH nem\u016f\u017ee nahradit VPN z hlediska obch\u00e1zen\u00ed blokac\u00ed realizovan\u00fdch na \u00farovni DPI) nebo pro zaji\u0161t\u011bn\u00ed funk\u010dnosti v p\u0159\u00edpad\u011b nemo\u017enosti p\u0159\u00edm\u00e9ho p\u0159\u00edstupu k DNS server\u016fm (nap\u0159\u00edklad p\u0159i pr\u00e1ci p\u0159es proxy). V obvykl\u00e9 situaci jsou DNS dotazy p\u0159\u00edmo odes\u00edl\u00e1ny na konkr\u00e9tn\u00ed DNS servery definovan\u00e9 v konfiguraci syst\u00e9mu, zat\u00edmco v p\u0159\u00edpad\u011b DoH je \u017e\u00e1dost o ur\u010den\u00ed IP adresy hostitele encapsulov\u00e1na v HTTPS provozu a odesl\u00e1na na HTTP server, na kter\u00e9m resolver zpracov\u00e1v\u00e1 po\u017eadavky prost\u0159ednictv\u00edm Web API. St\u00e1vaj\u00edc\u00ed standard DNSSEC pou\u017e\u00edv\u00e1 \u0161ifrov\u00e1n\u00ed pouze pro autentizaci klienta a serveru, ale nechr\u00e1n\u00ed provoz p\u0159ed odposlechem a nezaru\u010duje d\u016fv\u011brnost dotaz\u016f. <\/p>\n

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

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

\u0421\u043b\u0435\u0434\u043e\u043c \u0437\u0430 Mozilla \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u0441\u043e\u043e\u0431\u0449\u0438\u043b\u0430 \u043e \u043d\u0430\u043c\u0435\u0440\u0435\u043d\u0438\u0438 \u043f\u0440\u043e\u0432\u0435\u0441\u0442\u0438 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0434\u043b\u044f \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 Chrome \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 «DNS \u043f\u043e\u0432\u0435\u0440\u0445 HTTPS» (DoH, DNS over HTTPS). \u0412 \u0432\u044b\u043f\u0443\u0441\u043a\u0435 Chrome 78, \u043d\u0430\u043c\u0435\u0447\u0435\u043d\u043d\u043e\u043c \u043d\u0430 22 \u043e\u043a\u0442\u044f\u0431\u0440\u044f, \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u0438 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[…]<\/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-38121","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\udd47Experimenty s aktivac\u00ed DNS-over-HTTPS za\u010dnou v Chromu 78 | ProHoster","description":"N\u00e1sledn\u011b po Mozille p\u0159i\u0161la spole\u010dnost 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