{"id":34402,"date":"2019-10-31T21:58:08","date_gmt":"2019-10-31T18:58:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/osobennosti-nastrojki-dpi\/"},"modified":"2019-10-31T21:58:08","modified_gmt":"2019-10-31T18:58:08","slug":"osobennosti-nastrojki-dpi","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/osobennosti-nastrojki-dpi","title":{"rendered":"DPI seadistamise omadused","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Selles artiklis ei k\u00e4sitleta DPI t\u00e4ielikku seadistamist ja selle koosseisu, teaduslik v\u00e4\u00e4rtus on minimaalne. Siiski kirjeldatakse siin k\u00f5ige lihtsamat viisi DPI \u00fcletamiseks, mida paljud ettev\u00f5tted ei arvestanud.<\/p>\n<p><img decoding=\"async\" alt=\"DPI seadistamise omadused\" src=\"\/wp-content\/uploads\/2019\/05\/5fbb9d8c80da69f6d0058871953a095f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<i>Hoiatus nr 1: see artikkel on uurimuslik ja ei kutsu kedagi midagi ette v\u00f5tma v\u00f5i kasutama. Idee p\u00f5hineb isiklikul kogemusel ning k\u00f5ik kokkulangevused on juhuslikud.<\/i><\/p>\n<p><i>Hoiatus nr 2: artiklis ei avalikustata Atlantise saladusi, P\u00fcha Graali otsingut ja teisi universumi m\u00f5istatusi; k\u00f5ik materjalid on vabalt k\u00e4ttesaadavad ja on t\u00f5en\u00e4oliselt juba varem Habbis kirjeldatud. (Ma ei leidnud, oleksin t\u00e4nulik viite eest)<\/i><\/p>\n<p>Alustame nendele, kes lugesid hoiatustega.<\/p>\n<h3>Mis on DPI?<\/h3>\n<p>\nDPI ehk Deep Packet Inspection on tehnoloogia, mis kogub statistilisi andmeid, kontrollib ja filtreerib v\u00f5rgupakette, anal\u00fc\u00fcsides mitte ainult pakettide p\u00e4iseid, vaid ka kogu liikluse sisu OSI mudeli teisel ja k\u00f5rgemal tasemel, v\u00f5imaldades avastada ja blokeerida viiruseid ning filtreerida teavet, mis ei vasta kehtestatud kriteeriumidele.<\/p>\n<p>On olemas kaks t\u00fc\u00fcpi DPI \u00fchendusi, millest on r\u00e4\u00e4gitud <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/users\/valdikss\/\" class=\"user_link\">ValdikSS<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/ValdikSS\/blockcheck\/wiki\/%D0%A2%D0%B8%D0%BF%D1%8B-DPI\">githubis<\/a><\/noindex>:<\/p>\n<blockquote><p><b>Passiivne DPI <\/b><\/p>\n<p>DPI, mis on \u00fchendatud teenusepakkuja v\u00f5rgus paralleelselt (mitte l\u00f5ikes) kas passiivse optilise jaoturi kaudu v\u00f5i kasutades kasutajatelt saadud liikluse peegeldamist. Selline \u00fchendus ei aeglusta teenusepakkuja v\u00f5rgu t\u00f6\u00f6kiirus, kui DPI j\u00f5udlus ei ole piisav, mist\u00f5ttu seda kasutatakse suurte teenusepakkujate juures. Sellise \u00fchenduse t\u00fc\u00fcbiga DPI saab tehniliselt ainult usaldusv\u00e4\u00e4rselt tuvastada keeldunud sisu k\u00fcberturbe\u00fchenduse katse, kuid ei saa seda takistada. Selle piirangu \u00fcletamiseks ja keelatud saidile juurdep\u00e4\u00e4su blokeerimiseks saadab DPI kasutajale, kes k\u00fcsib keelatud URL-i, spetsiaalselt koostatud HTTP-paketi, mis suunab teenusepakkuja blokeerimislehele, justkui oleks sellise vastuse saatnud taotletud ressurss (tekitatakse vale IP-aadress ja TCP j\u00e4rjestus). Kuna DPI asub f\u00fc\u00fcsiliselt l\u00e4hemal kasutajale kui k\u00fcsitud sait, j\u00f5uab vale vastus kasutaja seadmesse kiiremini kui tegelik vastus saidilt.<\/p>\n<p><b>Aktiivne DPI<\/b><\/p>\n<p>Aktiivne DPI on DPI, mis on \u00fchendatud pakkuja v\u00f5rku tavaliste seadmete kombel. Pakkuja konfigureerib marsruutimise nii, et DPI saaks liiklust kasutajatelt blokeeritud IP-aadressidele v\u00f5i domeenidele, ning DPI otsustab juba, kas lasta liiklust l\u00e4bi v\u00f5i blokeerida. Aktiivne DPI v\u00f5ib kontrollida nii v\u00e4ljuvat kui ka sisenevat liiklust, kuid kui pakkuja rakendab DPI ainult lehtede blokeerimiseks registrist, konfigureeritakse seda enamasti ainult v\u00e4ljuva liikluse kontrollimiseks.<\/p><\/blockquote>\n<p>\n\u00dchenduse t\u00fc\u00fcp m\u00f5jutab mitte ainult liikluse blokeerimise efektiivsust, vaid ka DPI koormust, seega on v\u00f5imalik mitte kontrollida kogu liiklust, vaid ainult teatud:<\/p>\n<blockquote><p><b>\u201eTavaline\u201d DPI<\/b><\/p>\n<p>All \u201etavalise\u201d DPI m\u00f5istetakse sellist DPI, mis filtreerib kindlat t\u00fc\u00fcpi liiklust ainult selle t\u00fc\u00fcbi jaoks k\u00f5ige levinumatel portidel. N\u00e4iteks \u201etavaline\u201d DPI tuvastab ja blokeerib keelatud HTTP-liiklust ainult 80. porti, HTTPS-liiklust 443. porti. See DPI t\u00fc\u00fcp ei j\u00e4lgi keelatud sisu, kui saadate taotluse blokeeritud URL-iga blokeerimata IP- v\u00f5i mittestandardporti.<\/p>\n<p><b>\u201eT\u00e4ielik\u201d DPI<\/b><\/p>\n<p>Erinevalt \u201etavalisest\u201d DPI-st klassifitseerib see DPI t\u00fc\u00fcp liiklust s\u00f5ltumata IP-aadressist ja portist. Seega ei avane blokeeritud veebilehed, isegi kui kasutate proksiserverit t\u00e4iesti erineva portaali ja blokeerimata IP-aadressiga.<\/p><\/blockquote>\n<p><\/p>\n<h3>DPI kasutamine<\/h3>\n<p>\nAndmeedastuse kiirusest mitte tingitud peab kasutama \u201eTavalist\u201d passiivset DPI, mis v\u00f5imaldab t\u00f5husalt blokeerida mis tahes ressursse, vaikimisi konfigureerimine n\u00e4eb v\u00e4lja selline:<\/p>\n<ul>\n<li>HTTP filtreerida ainult 80. porti<\/li>\n<li>HTTPS ainult 443. porti<\/li>\n<li>BitTorrent ainult 6881-6889 portide vahel<\/li>\n<\/ul>\n<p>\nKuid probleemid algavad, kui <b>resurss kasutab teist porti, et mitte kaotada kasutajaid<\/b>, siis tuleb kontrollida iga paketti, n\u00e4iteks v\u00f5ib tuua:<\/p>\n<ul>\n<li>HTTP t\u00f6\u00f6tab 80 ja 8080 porti<\/li>\n<li>HTTPS 443 ja 8443 porti<\/li>\n<li>BitTorrent mis tahes teises ulatuses<\/li>\n<\/ul>\n<p>\nSeet\u00f5ttu tuleb kas minna \u00fcle \u201eAktiivsele\u201d DPI-le v\u00f5i kasutada blokeerimist t\u00e4iendava DNS-serveri abil.<\/p>\n<h3>Blokeerimine DNS-i abil<\/h3>\n<p>\n\u00dcks viis ressursile juurdep\u00e4\u00e4su blokeerimiseks on DNS-p\u00e4ringute interceptimine kohaliku DNS-serveri abil ning kasutajale \"m\u00e4tas\" IP-aadressi tagastamine n\u00f5utud ressursi asemel. Kuid see ei taga kindlat tulemust, kuna on v\u00f5imalik takistada aadressi asendamist:<\/p>\n<p><b>Variant 1: Hosts-faili redigeerimine (lauaarvutites)<\/b><\/p>\n<p>Hosts-fail on igas operatsioonis\u00fcsteemis h\u00e4davajalik osa, mis v\u00f5imaldab alati seda kasutada. Ressursile juurdep\u00e4\u00e4suks peab kasutaja:<\/p>\n<ol>\n<li>Selgitama n\u00f5utud ressursi IP-aadressi<\/li>\n<li>Ava redigeerimiseks hosts-fail (vajalikud administraatori \u00f5igused), mis asub j\u00e4rgmistel aadressidel:\n<ul>\n<li>Linux: \/etc\/hosts<\/li>\n<li>Windows: %WinDir%System32driversetchosts<\/li>\n<\/ul>\n<\/li>\n<li>Lisa rida j\u00e4rgmises formaadis:<\/li>\n<li>Salvesta muudatused<\/li>\n<\/ol>\n<p>\nSelle meetodi eeliseks on selle keerukus ja vajadus administraatori \u00f5iguste j\u00e4rele.<\/p>\n<p><b>Variant 2: DoH (DNS HTTPS kaudu) v\u00f5i DoT (DNS TLS kaudu)<\/b><\/p>\n<p>Need meetodid v\u00f5imaldavad kaitsta DNS-p\u00e4ringute asendamise eest kr\u00fcpteerimise kaudu, kuid rakenduse toetus ei ole k\u00f5igis rakendustes olemas. Vaatleme DoH-i seadistamise lihtsust Mozilla Firefoxi versioonis 66 kasutaja poolt:<\/p>\n<ol>\n<li>Mine aadressile <noindex><a rel=\"nofollow\" href=\"http:\/\/about:config\">about:config<\/a><\/noindex> Firefoxis<\/li>\n<li>Kinnita, et kasutaja v\u00f5tab kogu riski peale<\/li>\n<li>Muuda parameetri v\u00e4\u00e4rtust <b>network.trr.mode<\/b> selle asemel:\n<ul>\n<li>0 \u2014 TRR keelamine<\/li>\n<li>1 \u2014 automaatne valik<\/li>\n<li>2 \u2014 DoH lubamine vaikevalikuna<\/li>\n<\/ul>\n<\/li>\n<li>Muuda parameetrit <b>network.trr.uri<\/b> valides DNS-serveri\n<ul>\n<li>Cloudflare DNS: <noindex>mozilla.cloudflare-dns.com\/dns-query<\/noindex><\/li>\n<li>Google DNS: <noindex>dns.google.com\/experimental<\/noindex><\/li>\n<\/ul>\n<\/li>\n<li>Muuda parameetrit <b>network.trr.boostrapAddress<\/b> selle asemel:\n<ul>\n<li>Kui on valitud Cloudflare DNS: 1.1.1.1<\/li>\n<li>Kui on valitud Google DNS: 8.8.8.8<\/li>\n<\/ul>\n<\/li>\n<li>Muuda parameetri v\u00e4\u00e4rtust <b>network.security.esni.enabled<\/b> . Tundub, et <b>true<\/b><\/li>\n<li>Kontrolli seadistuste \u00f5igsust <noindex><a rel=\"nofollow\" href=\"https:\/\/www.cloudflare.com\/ssl\/encrypted-sni\/\">Cloudflare teenuse kaudu<\/a><\/noindex><\/li>\n<\/ol>\n<p>\nKuigi see viis on keerukam, ei n\u00f5ua see kasutajalt administraatori \u00f5iguseid, samuti on palju muid DNS-p\u00e4ringute kaitse meetodeid, mis ei ole selles artiklis kirjeldatud.<\/p>\n<p><b>Variant 3 (mobiilseadmete jaoks):<\/b> <\/p>\n<p>Kasutades Cloudflare'i rakendust <noindex><a rel=\"nofollow\" href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.cloudflare.onedotonedotonedotone\">Android<\/a><\/noindex> ja <noindex><a rel=\"nofollow\" href=\"https:\/\/itunes.apple.com\/us\/app\/1-1-1-1-faster-internet\/id1423538627?mt=8\">IOS<\/a><\/noindex>.<\/p>\n<h3>Testimine<\/h3>\n<p>\nRessursside juurdep\u00e4\u00e4su kontrollimiseks on ajutiselt ostetud domeen, mis on Venemaa territooriumil blokeeritud:<\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"http:\/\/1winu.xyz:80\">HTTP kontroll + 80 port<\/a><\/noindex><\/li>\n<li><noindex>HTTP kontroll + 8080 port<\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/1winu.xyz:443\">HTTPS kontroll + 443 port<\/a><\/noindex><\/li>\n<li><noindex>HTTPS kontroll + 8443 port<\/noindex><\/li>\n<\/ul>\n<p><\/p>\n<h3>Kokkuv\u00f5te<\/h3>\n<p>\nLoodan, et see artikkel on kasulik ja julgustab mitte ainult administraatoreid s\u00fcvenema teemas, vaid annab ka arusaama, et <b>ressursid on alati kasutaja poolel ning uute lahenduste leidmine peaks neile olema lahutamatu osa.<\/b><\/p>\n<h4>Kasulikud lingid<\/h4>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/globalsign\/blog\/427563\/\">Encrypted SNI standard rakendamine Firefoxis<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/335436\/\">Autonoomne viis DPI \u00fcletamiseks<\/a><\/noindex><\/li>\n<\/ul>\n<p>\n<b class=\"spoiler_title\">Lisaartikkel<\/b>Cloudflare'i testi ei saa Tele2 operaatori v\u00f5rgus l\u00e4bida, ning korralikult seadistatud DPI blokeerib juurdep\u00e4\u00e4su testimisplatvormile. <br \/>\nP.S. See on seni ainus teenusepakkuja, kes \u00f5igesti blokeerib ressursse.<\/p>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/453260\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u043d\u0435 \u0440\u0430\u0441\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u043e\u043b\u043d\u0430\u044f \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430 DPI \u0438 \u0432\u0441\u0435 \u0432\u043c\u0435\u0441\u0442\u0435 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u043e\u0435, \u0430 \u043d\u0430\u0443\u0447\u043d\u0430\u044f \u0446\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u0442\u0435\u043a\u0441\u0442\u0430 \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u0430. \u041d\u043e \u0432 \u043d\u0435\u0439 \u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u0440\u043e\u0441\u0442\u0435\u0439\u0448\u0438\u0439 \u0441\u043f\u043e\u0441\u043e\u0431 \u043e\u0431\u0445\u043e\u0434\u0430 DPI, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043d\u0435 \u0443\u0447\u043b\u0438 \u043c\u043d\u043e\u0433\u0438\u0435 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438. \u041f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u0435 \u21161: \u0434\u0430\u043d\u043d\u0430\u044f \u0441\u0442\u0430\u0442\u044c\u044f \u043d\u0435\u0441\u0435\u0442 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0438\u0445 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440, \u043d\u0435 \u043f\u043e\u0431\u0443\u0436\u0434\u0430\u0435\u0442 \u043d\u0438\u043a\u043e\u0433\u043e \u0447\u0442\u043e-\u043b\u0438\u0431\u043e \u043f\u0440\u0435\u0434\u043f\u0440\u0438\u043d\u0438\u043c\u0430\u0442\u044c \u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c. \u0418\u0434\u0435\u044f \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 \u043b\u0438\u0447\u043d\u043e\u043c \u043e\u043f\u044b\u0442\u0435, \u0430 \u043b\u044e\u0431\u044b\u0435 \u0441\u043e\u0432\u043f\u0430\u0434\u0435\u043d\u0438\u044f \u0441\u043b\u0443\u0447\u0430\u0439\u043d\u044b. \u041f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u0435 \u21162: [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25916,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-34402","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" 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