{"id":71411,"date":"2020-02-26T03:10:13","date_gmt":"2020-02-26T00:10:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/dns-over-https-vklyuchyon-po-umolchaniyu-v-firefox-dlya-polzovatelej-iz-ssha"},"modified":"2020-03-03T16:10:46","modified_gmt":"2020-03-03T13:10:46","slug":"dns-over-https-vklyuchyon-po-umolchaniyu-v-firefox-dlya-polzovatelej-iz-ssha","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/dns-over-https-vklyuchyon-po-umolchaniyu-v-firefox-dlya-polzovatelej-iz-ssha","title":{"rendered":"A DNS-over-HTTPS alap\u00e9rtelmez\u00e9s szerint enged\u00e9lyezve van a Firefoxban az Egyes\u00fclt \u00c1llamokbeli felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A Firefox fejleszt\u0151i <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.mozilla.org\/blog\/2020\/02\/25\/firefox-continues-push-to-bring-dns-over-https-by-default-for-us-users\/\">bejelentett\u00e9k<\/a><\/noindex> a DNS over HTTPS (DoH) alap\u00e9rtelmezett aktiv\u00e1l\u00e1s\u00e1r\u00f3l az Egyes\u00fclt \u00c1llamokb\u00f3l \u00e9rkez\u0151 felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra. A DNS-forgalom titkos\u00edt\u00e1sa alapvet\u0151 fontoss\u00e1g\u00fa a felhaszn\u00e1l\u00f3k v\u00e9delme szempontj\u00e1b\u00f3l. A mai napt\u00f3l kezdve minden \u00faj telep\u00edt\u00e9s, amelyet az Egyes\u00fclt \u00c1llamokb\u00f3l v\u00e9geztek, alap\u00e9rtelmez\u00e9s szerint aktiv\u00e1lja a DoH-t. A m\u00e1r megl\u00e9v\u0151 amerikai felhaszn\u00e1l\u00f3kat a k\u00f6vetkez\u0151 hetekben tervezik \u00e1t\u00e1ll\u00edtani a DoH-ra. Az Eur\u00f3pai Uni\u00f3ban \u00e9s m\u00e1s orsz\u00e1gokban egyel\u0151re nem tervezik a DoH alap\u00e9rtelmezett aktiv\u00e1l\u00e1s\u00e1t. <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.mozilla.org\/netpolicy\/2020\/02\/25\/the-facts-mozillas-dns-over-https-doh\/\">do not plan<\/a><\/noindex>.<\/p>\n<p>A DoH aktiv\u00e1l\u00e1sa ut\u00e1n a felhaszn\u00e1l\u00f3t figyelmeztet\u00e9s \u00e9rtes\u00edti, amely lehet\u0151v\u00e9 teszi sz\u00e1m\u00e1ra, hogy lemondjon a k\u00f6zpontos\u00edtott DoH DNS-szerverek ig\u00e9nybev\u00e9tel\u00e9r\u0151l, \u00e9s visszat\u00e9rjen a hagyom\u00e1nyos, titkos\u00edtatlan DNS-k\u00e9r\u00e9sek k\u00fcld\u00e9s\u00e9hez a szolg\u00e1ltat\u00f3 DNS-szerver\u00e9hez. A DoH-ban a DNS-rezolv\u00e1rok elosztott infrastrukt\u00far\u00e1ja helyett egy adott DoH-szolg\u00e1ltat\u00f3hoz val\u00f3 k\u00f6t\u0151d\u00e9s ker\u00fclt bevezet\u00e9sre, amely egys\u00e9ges hibapontk\u00e9nt kezelhet\u0151. Jelenleg k\u00e9t DNS-szolg\u00e1ltat\u00f3val m\u0171k\u00f6d\u00e9s javasolt \u2014 CloudFlare (alap\u00e9rtelmezett) \u00e9s <noindex><a rel=\"nofollow\" href=\"https:\/\/nextdns.io\/\">NextDNS<\/a><\/noindex>. <\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1581435648.png\"><img decoding=\"async\" alt=\"A DNS-over-HTTPS alap\u00e9rtelmez\u00e9s szerint enged\u00e9lyezve van a Firefoxban az Egyes\u00fclt \u00c1llamokbeli felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra.\" src=\"\/wp-content\/uploads\/2020\/02\/210feb80fbf1d43c4ae255cf266a11ea.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>M\u00f3dos\u00edtani a szolg\u00e1ltat\u00f3t vagy letiltani a DoH-t <noindex><a rel=\"nofollow\" href=\"https:\/\/support.mozilla.org\/en-US\/kb\/firefox-dns-over-https\">lehet\u0151v\u00e9 teszi<\/a><\/noindex> a h\u00e1l\u00f3zati kapcsolatok be\u00e1ll\u00edt\u00e1saiban. P\u00e9ld\u00e1ul megadhatjuk az alternat\u00edv DoH szervert \u201ehttps:\/\/dns.google\/dns-query\u201d a Google szervereihez, \u201ehttps:\/\/dns.quad9.net\/dns-query\u201d \u2014 Quad9 \u00e9s \u201ehttps:\/\/doh.opendns.com\/dns-query\u201d \u2014 OpenDNS. Az about:config men\u00fcben a network.trr.mode be\u00e1ll\u00edt\u00e1ssal m\u00f3dos\u00edthat\u00f3 a DoH m\u0171k\u00f6d\u00e9si m\u00f3dja: a 0 \u00e9rt\u00e9k teljesen kikapcsolja a DoH-t; 1 \u2014 a DNS vagy a DoH haszn\u00e1lata a gyorsabb v\u00e1laszid\u0151 alapj\u00e1n; 2 \u2014 alap\u00e9rtelmezett DoH haszn\u00e1lata, a DNS tartal\u00e9k megold\u00e1sk\u00e9nt; 3 \u2014 kiz\u00e1r\u00f3lag DoH haszn\u00e1lata; 4 \u2014 t\u00fck\u00f6r \u00fczemm\u00f3d, amelyben a DoH \u00e9s a DNS p\u00e1rhuzamosan van haszn\u00e1latban.  <\/p>\n<p>Eml\u00e9keztet\u00fcnk, hogy a DoH hasznos lehet a DNS-szerverekkel val\u00f3 kapcsolatfelv\u00e9tel sor\u00e1n felmer\u00fcl\u0151 n\u00e9vszerverekkel kapcsolatos adatsziv\u00e1rg\u00e1sok megsz\u00fcntet\u00e9s\u00e9re, a MITM-t\u00e1mad\u00e1sok ellen, \u00e9s a DNS-forgalom manipul\u00e1l\u00e1s\u00e1nak megakad\u00e1lyoz\u00e1s\u00e1ra (p\u00e9ld\u00e1ul nyilv\u00e1nos Wi-Fi haszn\u00e1lata eset\u00e9n), vagy a DNS-szint\u0171 blokkol\u00e1sokkal szembeni v\u00e9dekez\u00e9sre (a DoH nem helyettes\u00edtheti a VPN-t a DPI szintj\u00e9n t\u00f6rt\u00e9n\u0151 blokkol\u00e1sok megker\u00fcl\u00e9s\u00e9ben), valamint olyan helyzetek kezel\u00e9s\u00e9re, amikor k\u00f6zvetlen kapcsolat a DNS-szerverekkel nem lehets\u00e9ges (p\u00e9ld\u00e1ul proxy haszn\u00e1lata eset\u00e9n). M\u00edg norm\u00e1l k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt a DNS-k\u00e9rd\u00e9sek k\u00f6zvetlen\u00fcl a rendszerkonfigur\u00e1ci\u00f3ban megadott DNS-szerverekhez ker\u00fclnek elk\u00fcld\u00e9sre, DoH eset\u00e9n a n\u00e9vfelold\u00e1sra vonatkoz\u00f3 IP-c\u00edm keres\u00e9se az HTTPS forgalomban van be\u00e1gyazva, \u00e9s a HTTP-szerverre tov\u00e1bb\u00edt\u00f3dik, ahol a resolver a Web API-n kereszt\u00fcl kezeli a k\u00e9r\u00e9seket. A l\u00e9tez\u0151 DNSSEC szabv\u00e1ny titkos\u00edt\u00e1st csak az \u00fcgyf\u00e9l \u00e9s a szerver hiteles\u00edt\u00e9s\u00e9re haszn\u00e1l, de nem v\u00e9di meg a forgalmat a lehallgat\u00e1st\u00f3l, \u00e9s nem garant\u00e1lja a k\u00e9r\u00e9sek titkoss\u00e1g\u00e1t. <\/p>\n<p>A Firefoxban aj\u00e1nlott DoH-szolg\u00e1ltat\u00f3k kiv\u00e1laszt\u00e1s\u00e1ra vonatkoz\u00f3 <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.mozilla.org\/netpolicy\/2019\/12\/09\/trusted-recursive-resolvers-protecting-your-privacy-with-policy-technology\/\">k\u00f6vetelm\u00e9nyeket<\/a><\/noindex> alapj\u00e1n ker\u00fclnek kiv\u00e1laszt\u00e1sra, amelyek szerint a DNS-\u00fczemeltet\u0151 csak a szolg\u00e1ltat\u00e1s m\u0171k\u00f6d\u00e9s\u00e9hez sz\u00fcks\u00e9ges adatokat haszn\u00e1lhatja fel, nem t\u00e1rolhat napl\u00f3kat 24 \u00f3r\u00e1n\u00e1l tov\u00e1bb, nem adhatja \u00e1t az adatokat harmadik feleknek, \u00e9s k\u00f6telez\u0151en t\u00e1j\u00e9koztatnia kell az adatkezel\u00e9si m\u00f3dszerekr\u0151l. A szolg\u00e1ltat\u00e1snak szint\u00e9n k\u00f6telezetts\u00e9get kell v\u00e1llalnia arra, hogy nem cenz\u00far\u00e1zza, nem sz\u0171ri, nem avatkozik k\u00f6zbe, \u00e9s nem blokkolja a DNS-forgalmat, kiv\u00e9ve a t\u00f6rv\u00e9ny \u00e1ltal el\u0151\u00edrt helyzeteket. <\/p>\n<p>A DoH alkalmaz\u00e1s\u00e1t \u00f3vatosan kell v\u00e9gezni. P\u00e9ld\u00e1ul Oroszorsz\u00e1gban a 104.16.248.249 \u00e9s 104.16.249.249 IP-c\u00edmeket, amelyek a Firefoxban alap\u00e9rtelmez\u00e9s szerint javasolt DoH-szerverhez, a mozilla.cloudflare-dns.com-hoz kapcsol\u00f3dnak,  <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1593176\">feketelist\u00e1ra tett\u00e9k<\/a><\/noindex> be. <noindex><a rel=\"nofollow\" href=\"http:\/\/isitblockedinrussia.com\/?host=mozilla.cloudflare-dns.com\">list\u00e1kba<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/wiki.opennet.ru\/BlockedRKN\">z\u00e1rol\u00e1sok<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/blocklist.rkn.gov.ru\/\">Roskomnadzor<\/a><\/noindex> a Szterep in. b\u00edr\u00f3s\u00e1g 2013.06.10-i hat\u00e1rozata alapj\u00e1n.<\/p>\n<p>A DoH alkalmaz\u00e1sa probl\u00e9m\u00e1khoz vezethet olyan ter\u00fcleteken, mint a sz\u00fcl\u0151i ellen\u0151rz\u0151 rendszerek, a v\u00e1llalati rendszerek bels\u0151 n\u00e9vrendszereibe val\u00f3 hozz\u00e1f\u00e9r\u00e9s, a tartalomell\u00e1t\u00f3 rendszerek \u00fatvonalv\u00e1laszt\u00e1sa \u00e9s a joger\u0151s hat\u00e1rozatok v\u00e9grehajt\u00e1sa az illeg\u00e1lis tartalmak terjeszt\u00e9s\u00e9nek \u00e9s a kiskor\u00faak kihaszn\u00e1l\u00e1s\u00e1nak megakad\u00e1lyoz\u00e1sa \u00e9rdek\u00e9ben. Az ilyen probl\u00e9m\u00e1k megker\u00fcl\u00e9s\u00e9re egy olyan rendszer val\u00f3sult meg \u00e9s lett tesztelve, amely automatikusan letiltja a DoH-t bizonyos k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt. <\/p>\n<p>A v\u00e1llalati felold\u00f3kat nem szokv\u00e1nyos legfels\u0151bb szint\u0171 domainek (TLD) ellen\u0151rz\u00e9s\u00e9vel \u00e9s az intranetes c\u00edmek visszaad\u00e1s\u00e1val az alap\u00e9rtelmezett felold\u00f3 \u00e1ltal hat\u00e1rozzuk meg. A sz\u00fcl\u0151i ellen\u0151rz\u00e9s enged\u00e9lyez\u00e9s\u00e9nek meghat\u00e1roz\u00e1s\u00e1hoz megk\u00eds\u00e9relj\u00fck feloldani a p\u00e9ld\u00e1ulexampleadultsite.com nev\u00e9t, \u00e9s ha az eredm\u00e9ny nem egyezik meg a val\u00f3s IP-vel, akkor az azt jelenti, hogy a DNS szinten akt\u00edv a feln\u0151tt tartalom blokkol\u00e1sa. A Google \u00e9s a YouTube IP c\u00edmek helyettes\u00edt\u00e9s\u00e9nek ellen\u0151rz\u00e9se is jelek\u00e9nt szolg\u00e1l, p\u00e9ld\u00e1ul restrict.youtube.com, forcesafesearch.google.com \u00e9s restrictmoderate.youtube.com c\u00edmekre. Ezek az ellen\u0151rz\u00e9sek lehet\u0151v\u00e9 teszik a t\u00e1mad\u00f3k sz\u00e1m\u00e1ra, akik ir\u00e1ny\u00edtj\u00e1k a felold\u00f3 m\u0171k\u00f6d\u00e9s\u00e9t vagy be tudnak avatkozni a forgalomba, hogy hasonl\u00f3 viselked\u00e9st szimul\u00e1ljanak a DNS-forgalom titkos\u00edt\u00e1s\u00e1nak le\u00e1ll\u00edt\u00e1s\u00e1hoz.<\/p>\n<p>Egyetlen DoH-szolg\u00e1ltat\u00f3 haszn\u00e1lata potenci\u00e1lisan probl\u00e9m\u00e1kat okozhat a forgalom optimaliz\u00e1l\u00e1s\u00e1ban a tartalomell\u00e1t\u00f3 h\u00e1l\u00f3zatokban, amelyek DNS-alap\u00fa terhel\u00e9seloszt\u00e1st v\u00e9geznek (a CDN-h\u00e1l\u00f3zat DNS-szervere v\u00e1lasz\u00e1t a felold\u00f3 c\u00edm\u00e9re figyelembe v\u00e9ve adja meg, \u00e9s a tartalom el\u00e9r\u00e9s\u00e9hez legk\u00f6zelebbi hoszt c\u00edm\u00e9t adja). A DNS-lek\u00e9rdez\u00e9s elk\u00fcld\u00e9se a felhaszn\u00e1l\u00f3hoz legk\u00f6zelebbi felold\u00f3r\u00f3l ilyen CDN eset\u00e9ben a felhaszn\u00e1l\u00f3hoz legk\u00f6zelebbi hoszt c\u00edm\u00e9nek visszaad\u00e1s\u00e1hoz vezet, de a k\u00f6zpontos\u00edtott felold\u00f3r\u00f3l elk\u00fcld\u00f6tt DNS-lek\u00e9rdez\u00e9s a DNS-over-HTTPS szerverhez legk\u00f6zelebbi hoszt c\u00edm\u00e9t adja meg. A gyakorlati tesztel\u00e9s azt mutatta, hogy a DNS-over-HTTP haszn\u00e1lata a CDN-ek mellett gyakorlatilag nem okozott k\u00e9sleltet\u00e9seket a tartalom \u00e1tvitele el\u0151tt (gyors kapcsolatok eset\u00e9n a k\u00e9sleltet\u00e9sek nem haladt\u00e1k meg a 10 milliszekundumot, m\u00edg lass\u00fa kapcsolatokn\u00e1l a m\u0171k\u00f6d\u00e9s felgyorsul\u00e1s\u00e1t is \u00e9szlelt\u00e9k). A CDN-nek a kliens tart\u00f3zkod\u00e1si hely\u00e9r\u0151l val\u00f3 inform\u00e1ci\u00f3k \u00e1tad\u00e1s\u00e1hoz az EDNS Client Subnet kiterjeszt\u00e9s alkalmaz\u00e1sa is figyelembe volt v\u00e9ve.<\/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=52427\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 Firefox \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0438 \u043e \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0438 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0440\u0435\u0436\u0438\u043c\u0430 DNS \u043f\u043e\u0432\u0435\u0440\u0445 HTTPS (DoH, DNS over HTTPS) \u0434\u043b\u044f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0438\u0437 \u0421\u0428\u0410. \u0428\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u0435 DNS-\u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u0440\u0430\u0441\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u043f\u0440\u0438\u043d\u0446\u0438\u043f\u0438\u0430\u043b\u044c\u043d\u043e \u0432\u0430\u0436\u043d\u044b\u0439 \u0444\u0430\u043a\u0442\u043e\u0440 \u0437\u0430\u0449\u0438\u0442\u044b \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439. \u041d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0441\u0435\u0433\u043e\u0434\u043d\u044f\u0448\u043d\u0435\u0433\u043e \u0434\u043d\u044f \u0432\u043e \u0432\u0441\u0435\u0445 \u043d\u043e\u0432\u044b\u0445 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0430\u0445, \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u043d\u044b\u0445 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c\u0438 \u0438\u0437 \u0421\u0428\u0410, DoH \u0430\u043a\u0442\u0438\u0432\u0438\u0440\u043e\u0432\u0430\u043d \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e. \u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0438\u0437 \u0421\u0428\u0410 \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043f\u0435\u0440\u0435\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u043d\u0430 DoH \u0432 \u0442\u0435\u0447\u0435\u043d\u0438\u0435 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":71412,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-71411","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=\"\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 Firefox \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0438 \u043e \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0438 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e.\" \/>\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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