{"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\/hr\/blog\/news\/osobennosti-nastrojki-dpi","title":{"rendered":"Zna\u010dajke konfiguriranja DPI","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ovaj \u010dlanak ne obra\u0111uje potpunu konfiguraciju DPI i sve povezano s tim, a znanstvena vrijednost teksta je minimalna. Me\u0111utim, opisuje najjednostavniji na\u010din zaobila\u017eenja DPI-a, koji su mnoge tvrtke zanemarile.<\/p>\n<p><img decoding=\"async\" alt=\"Zna\u010dajke konfiguriranja DPI\" 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>Upozorenje br. 1: Ovaj \u010dlanak ima istra\u017eiva\u010dki karakter, ne poti\u010de nikoga na poduzimanje mjera ili kori\u0161tenje informacija. Ideja se temelji na osobnom iskustvu, a svi sastanci su slu\u010dajni.<\/i><\/p>\n<p><i>Upozorenje br. 2: U \u010dlanku se ne otkrivaju tajne Atlantide, potrage za Svetim Gralom i druge misterije svemira, sav materijal je slobodno dostupan i mogu\u0107e je da je ve\u0107 opisivan na Habu. (nisam na\u0161ao, bio bih zahvalan za link)<\/i><\/p>\n<p>Za one koji su pro\u010ditali upozorenja, krenimo.<\/p>\n<h3>\u0160to je DPI?<\/h3>\n<p>\nDPI ili Dubinska Inspekcija Paketa je tehnologija prikupljanja statisti\u010dkih podataka, provjere i filtriranja mre\u017enih paketa analiziraju\u0107i ne samo zaglavlja paketa, ve\u0107 i cijeli sadr\u017eaj prometa na razinama OSI modela od drugog i vi\u0161e, \u0161to omogu\u0107uje otkrivanje i blokiranje virusa, filtriranje informacija koje ne zadovoljavaju zadane kriterije.<\/p>\n<p>Postoje dvije vrste DPI veza, koje su opisane <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\">na githubu<\/a><\/noindex>:<\/p>\n<blockquote><p><b>Pasivni DPI <\/b><\/p>\n<p>DPI priklju\u010den u mre\u017eu pru\u017eatelja usluga paralelno (ne u rez) ili putem pasivnog opti\u010dkog razdjeljiva\u010da, ili kori\u0161tenjem preslikavanja odlaznog prometa korisnika. Ova vrsta povezivanja ne usporava brzinu rada mre\u017ee pru\u017eatelja usluga u slu\u010daju nedovoljne u\u010dinkovitosti DPI-a, zbog \u010dega se koristi kod velikih pru\u017eatelja. DPI s ovom vrstom povezivanja tehni\u010dki mo\u017ee samo otkriti poku\u0161aje pristupa zabranjenom sadr\u017eaju, ali ne mo\u017ee ih sprije\u010diti. Da bi zaobi\u0161ao ovo ograni\u010denje i blokirao pristup zabranjenim stranicama, DPI \u0161alje korisniku koji poku\u0161ava pristupiti blokiranom URL-u posebno oblikovani HTTP paket s preusmjeravanjem na stranicu-propu\u0161\u0107enicu pru\u017eatelja, kao da je taj odgovor poslao sam tra\u017eeni resurs (la\u017eira se IP adresa po\u0161iljatelja i TCP slijed). Budu\u0107i da je DPI fizi\u010dki bli\u017ee korisniku nego tra\u017eena stranica, la\u017eirani odgovor sti\u017ee do korisni\u010dkog ure\u0111aja br\u017ee nego pravi odgovor od stranice.<\/p>\n<p><b>Aktivni DPI<\/b><\/p>\n<p>Aktivni DPI \u2013 DPI povezani u mre\u017eu pru\u017eatelja na uobi\u010dajen na\u010din, kao i bilo ure\u0111aj povezan u mre\u017eu. Pru\u017eatelj konfigurira usmjeravanje tako da DPI dobiva promet od korisnika prema blokiranim IP adresama ili domenama, a DPI ve\u0107 donosi odluku o propu\u0161tanju ili blokiranju prometa. Aktivni DPI mo\u017ee provjeravati kako odlazni, tako i dolazni promet, me\u0111utim, ako pru\u017eatelj primjenjuje DPI samo za blokiranje web stranica iz registra, naj\u010de\u0161\u0107e ga postavljaju za provjeru samo odlaznog prometa.<\/p><\/blockquote>\n<p>\nTip veze utje\u010de ne samo na u\u010dinkovitost blokiranja prometa, ve\u0107 i na optere\u0107enje na DPI-u, stoga postoji mogu\u0107nost ne provjeravati sav promet, ve\u0107 samo odre\u0111eni:<\/p>\n<blockquote><p><b>\u201eUobi\u010dajeni\u201c DPI<\/b><\/p>\n<p>Pod \u201euobi\u010dajenim\u201c DPI-jem podrazumijeva se takav DPI koji filtrira odre\u0111eni tip prometa samo na naj\u010de\u0161\u0107e kori\u0161tenim portovima za tu vrstu. Na primjer, \u201euobi\u010dajeni\u201c DPI otkriva i blokira zabranjeni HTTP promet samo na portu 80, HTTPS promet na portu 443. Ova vrsta DPI-a ne\u0107e pratiti zabranjeni sadr\u017eaj ako po\u0161aljete zahtjev s blokiranim URL-om na nezabranjenu IP adresu ili nestandardni port.<\/p>\n<p><b>\u201ePotpuni\u201c DPI<\/b><\/p>\n<p>Za razliku od \u201euobi\u010dajenog\u201c DPI-a, ova vrsta DPI-a klasificira promet neovisno o IP adresi i portu. Na taj na\u010din, blokirane web stranice ne\u0107e se otvarati, \u010dak i ako koristite proxy poslu\u017eitelj na potpuno drugom portu i nezabranjenoj IP adresi.<\/p><\/blockquote>\n<p><\/p>\n<h3>Kori\u0161tenje DPI-a<\/h3>\n<p>\nKako ne bi do\u0161lo do smanjenja brzine prijenosa podataka, potrebno je koristiti \u201eUobi\u010dajeni\u201c pasivni DPI, koji omogu\u0107ava u\u010dinkovito blokiranje bilo kakvih resursa, a prema zadanoj konfiguraciji to izgleda ovako:<\/p>\n<ul>\n<li>HTTP filtrirati samo na 80 portu<\/li>\n<li>HTTPS samo na 443 portu<\/li>\n<li>BitTorrent samo na portovima 6881-6889<\/li>\n<\/ul>\n<p>\nNo problemi po\u010dinju, ako <b>resurs koristi drugi port kako ne bi izgubio korisnike<\/b>, tada \u0107e biti potrebno provjeravati svaki paket, kao primjer mo\u017ee poslu\u017eiti:<\/p>\n<ul>\n<li>HTTP radi na 80 i 8080 portu<\/li>\n<li>HTTPS na 443 i 8443 portu<\/li>\n<li>BitTorrent na bilo kojem drugom rasponu<\/li>\n<\/ul>\n<p>\nZbog toga \u0107e biti potrebno ili pre\u0107i na \u201eAktivni\u201c DPI, ili koristiti blokiranje putem dodatnog DNS poslu\u017eitelja.<\/p>\n<h3>Blokiranje putem DNS-a<\/h3>\n<p>\nJedan od na\u010dina za blokiranje pristupa resursu je preuzimanje DNS zahtjeva putem lokalnog DNS poslu\u017eitelja i vra\u0107anje korisniku IP adrese \"zastavice\" umjesto tra\u017eenog resursa. Me\u0111utim, ovo ne garantira rezultat, jer postoji mogu\u0107nost sprje\u010davanja zamjene adrese:<\/p>\n<p><b>Opcija 1: Ure\u0111ivanje datoteke hosts (za desktop)<\/b><\/p>\n<p>Datoteka hosts je neizostavni dio svakog operativnog sustava, \u0161to omogu\u0107ava uvijek kori\u0161tenje. Da bi korisnik pristupio resursu, treba:<\/p>\n<ol>\n<li>Saznati IP adresu tra\u017eenog resursa<\/li>\n<li>Otvoriti za ure\u0111ivanje datoteku hosts (potrebna su administratorska prava), koja se nalazi na:\n<ul>\n<li>Linux: \/etc\/hosts<\/li>\n<li>Windows: %WinDir%System32driversetchosts<\/li>\n<\/ul>\n<\/li>\n<li>Dodati redak u formatu:<\/li>\n<li>Spremiti promjene<\/li>\n<\/ol>\n<p>\nPrednost ove metode je njena slo\u017eenost i zahtjevi za administratorskim pravima.<\/p>\n<p><b>Opcija 2: DoH (DNS preko HTTPS) ili DoT (DNS preko TLS)<\/b><\/p>\n<p>Ove metode omogu\u0107uju za\u0161titu od zamjene DNS zahtjeva putem enkripcije, ali implementacija nije podr\u017eana od svih aplikacija. Razmotrit \u0107emo jednostavnost postavljanja DoH za Mozilla Firefox verziju 66 s korisni\u010dke strane:<\/p>\n<ol>\n<li>Posjetiti adresu <noindex><a rel=\"nofollow\" href=\"http:\/\/about:config\">about:config<\/a><\/noindex> u Firefoxu<\/li>\n<li>Potvrditi da korisnik preuzima sav rizik<\/li>\n<li>Promijeniti vrijednost parametra <b>network.trr.mode<\/b> na:\n<ul>\n<li>0 \u2014 isklju\u010diti TRR<\/li>\n<li>1 \u2014 automatski odabir<\/li>\n<li>2 \u2014 uklju\u010diti DoH prema zadanim postavkama<\/li>\n<\/ul>\n<\/li>\n<li>Promijeniti parametar <b>network.trr.uri<\/b> odabiru\u0107i DNS poslu\u017eitelj\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>Promijeniti parametar <b>network.trr.boostrapAddress<\/b> na:\n<ul>\n<li>Ako je odabran Cloudflare DNS: 1.1.1.1<\/li>\n<li>Ako je odabran Google DNS: 8.8.8.8<\/li>\n<\/ul>\n<\/li>\n<li>Promijeniti vrijednost parametra <b>network.security.esni.enabled<\/b> na <b>true<\/b><\/li>\n<li>Provjeriti ispravnost postavki putem <noindex><a rel=\"nofollow\" href=\"https:\/\/www.cloudflare.com\/ssl\/encrypted-sni\/\">Cloudflare usluge<\/a><\/noindex><\/li>\n<\/ol>\n<p>\nIako je ovaj pristup slo\u017eeniji, ne zahtijeva postoje\u0107a administratorska prava korisnika, a postoje brojne druge metode za\u0161tite DNS zahtjeva koje nisu opisane u ovom \u010dlanku.<\/p>\n<p><b>Opcija 3 (za mobilne ure\u0111aje):<\/b> <\/p>\n<p>Kori\u0161tenje aplikacije od Cloudflare za <noindex><a rel=\"nofollow\" href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.cloudflare.onedotonedotonedotone\">Android<\/a><\/noindex> i <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>Testiranje<\/h3>\n<p>\nKako bi se provjerio nedostatak pristupa resursima, privremeno je otkupljena domenska adresa, blokirana na teritoriju RF:<\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"http:\/\/1winu.xyz:80\">Provjera HTTP + 80 port<\/a><\/noindex><\/li>\n<li><noindex>Provjera HTTP + 8080 port<\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/1winu.xyz:443\">Provjera HTTPS + 443 port<\/a><\/noindex><\/li>\n<li><noindex>Provjera HTTPS + 8443 port<\/noindex><\/li>\n<\/ul>\n<p><\/p>\n<h3>Zaklju\u010dak<\/h3>\n<p>\nNadam se da \u0107e ova stranica biti korisna i potaknuti ne samo administratore da detaljnije istra\u017ee ovu temu, ve\u0107 i dati razumijevanje da <b>resursi \u0107e uvijek biti na strani korisnika, a pronalazak novih rje\u0161enja trebao bi biti neizostavni dio za njih.<\/b><\/p>\n<h4>Koristitne veze<\/h4>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/globalsign\/blog\/427563\/\">Implementacija Encrypted SNI standarda u Firefoxu<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/335436\/\">Autonomni na\u010din za zaobila\u017eenje DPI-a<\/a><\/noindex><\/li>\n<\/ul>\n<p>\n<b class=\"spoiler_title\">Dopuna izvan \u010dlanka<\/b>Test na Cloudflare nije mogu\u0107e pro\u0107i u mre\u017ei operatera Tele2, a ispravno konfigurirani DPI blokira pristup testnoj platformi. <br \/>\nP.S. Ovo je prvi operator koji ispravno blokira resurse.<\/p>\n<p>Izvor: <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 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u043d\u0435 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