{"id":38090,"date":"2019-10-31T22:21:36","date_gmt":"2019-10-31T19:21:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/eksperiment-cachebrowser-obhod-kitajskogo-faervola-bez-proksi-s-pomoshhyu-keshirovaniya-kontenta\/"},"modified":"2019-10-31T22:21:36","modified_gmt":"2019-10-31T19:21:36","slug":"eksperiment-cachebrowser-obhod-kitajskogo-faervola-bez-proksi-s-pomoshhyu-keshirovaniya-kontenta","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/eksperiment-cachebrowser-obhod-kitajskogo-faervola-bez-proksi-s-pomoshhyu-keshirovaniya-kontenta","title":{"rendered":"Eksperimenti CacheBrowser: kalimi p\u00ebrmes firewall-it kinez pa proxy duke p\u00ebrdorur caching t\u00eb p\u00ebrmbajtjes","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/infatica\/blog\/467201\/\"><img decoding=\"async\" alt=\"Eksperimenti CacheBrowser: kalimi p\u00ebrmes firewall-it kinez pa proxy duke p\u00ebrdorur caching t\u00eb p\u00ebrmbajtjes\" src=\"\/wp-content\/uploads\/2019\/09\/730c423783cdac5ddd8fef02d1e0bb72.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p><i>Imazhi: <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/pY_AZJfdbHQ\">Unsplash<\/a><\/noindex><\/i><\/p>\n<p>Sot nj\u00eb pjes\u00eb e madhe e p\u00ebrmbajtjes n\u00eb internet shp\u00ebrndahet p\u00ebrmes rrjeteve CDN. Megjithat\u00eb, k\u00ebrkime mbi m\u00ebnyrat se si censuruesit ushtrojn\u00eb ndikimin e tyre n\u00eb k\u00ebto rrjete. Shkenc\u00ebtar\u00ebt nga Universiteti i Massachusetts <noindex><a rel=\"nofollow\" href=\"https:\/\/people.cs.umass.edu\/~amir\/papers\/CacheBrowser.pdf\">analizuan<\/a><\/noindex> metodat e mundshme p\u00ebr bllokimin e p\u00ebrmbajtjes CDN duke u bazuar n\u00eb praktikat e autoriteteve kineze dhe zhvilluan nj\u00eb mjet p\u00ebr t\u00eb anashkaluar k\u00ebto bllokime.<\/p>\n<p>Ne p\u00ebrgatit\u00ebm nj\u00eb material p\u00ebrmbledh\u00ebs me p\u00ebrfundimet kryesore dhe rezultatet e k\u00ebtij eksperimenti.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Hyrje<\/h2>\n<p>\nCensura \u00ebsht\u00eb nj\u00eb k\u00ebrc\u00ebnim global p\u00ebr lirin\u00eb e shprehjes n\u00eb internet dhe aksesin e lir\u00eb n\u00eb informacion. Kjo \u00ebsht\u00eb e mundur n\u00eb mas\u00eb t\u00eb madhe p\u00ebr shkak t\u00eb faktit se interneti ka marr\u00eb modelin \"end-to-end komunikimi\" nga rrjetet telefonike t\u00eb viteve \u201970. Kjo lejon bllokimin e aksesit n\u00eb p\u00ebrmbajtje ose komunikimin e p\u00ebrdoruesve pa ndonj\u00eb p\u00ebrpjekje t\u00eb r\u00ebnd\u00ebsishme ose kostos, thjesht mbi baz\u00ebn e adres\u00ebs IP. K\u00ebtu jan\u00eb disa m\u00ebnyra, nga bllokimi i adres\u00ebs s\u00eb vetme me p\u00ebrmbajtje t\u00eb ndaluar deri te bllokimi i mund\u00ebsis\u00eb q\u00eb p\u00ebrdoruesit t\u00eb din\u00eb madje se ajo ekziston p\u00ebrmes manipulimeve me DNS.<\/p>\n<p>Megjithat\u00eb, zhvillimi i internetit ka sjell\u00eb edhe m\u00ebnyra t\u00eb reja p\u00ebr shp\u00ebrndarjen e informacionit. Nj\u00ebra prej tyre \u00ebsht\u00eb p\u00ebrdorimi i p\u00ebrmbajtjes t\u00eb cache-uar p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar performanc\u00ebn dhe shpejt\u00ebsin\u00eb e komunikimeve. Sot, ofruesit e CDN trajtojn\u00eb nj\u00eb pjes\u00eb t\u00eb madhe t\u00eb t\u00eb gjith\u00eb trafikut global - vet\u00ebm Akamai, udh\u00ebheq\u00ebsi n\u00eb k\u00ebt\u00eb segment, p\u00ebrb\u00ebn deri n\u00eb 30% t\u00eb trafikut global statik n\u00eb ueb. <\/p>\n<p>RRJETI CDN \u00ebsht\u00eb nj\u00eb sistem i shp\u00ebrndar\u00eb p\u00ebr shp\u00ebrndarjen e p\u00ebrmbajtjes n\u00eb internet me shpejt\u00ebsi maksimale. Nj\u00eb rrjet tipik CDN p\u00ebrb\u00ebhet nga server\u00eb n\u00eb pika t\u00eb ndryshme gjeografike q\u00eb cache-ojn\u00eb p\u00ebrmbajtjen p\u00ebr ta \"dor\u00ebzuar\" at\u00eb atyre p\u00ebrdoruesve q\u00eb ndodhen m\u00eb af\u00ebr atij serveri. Kjo lejon nj\u00eb rritje t\u00eb konsiderueshme t\u00eb shpejt\u00ebsis\u00eb s\u00eb komunikimeve online.<\/p>\n<p>P\u00ebrve\u00e7 p\u00ebrmir\u00ebsimit t\u00eb cil\u00ebsis\u00eb s\u00eb sh\u00ebrbimeve p\u00ebr p\u00ebrdoruesit p\u00ebrfundimtar\u00eb, hostimi CDN ndihmon krijuesit e p\u00ebrmbajtjes t\u00eb shkall\u00ebzojn\u00eb projektet e tyre, duke reduktuar ngarkes\u00ebn n\u00eb infrastruktur\u00eb.<\/p>\n<h2>Censura e p\u00ebrmbajtjes CDN<\/h2>\n<p>\nMegjith\u00ebse trafiku CDN z\u00eb nj\u00eb pjes\u00eb t\u00eb madhe t\u00eb t\u00eb gjith\u00eb informacionit q\u00eb kalon n\u00ebp\u00ebr internet, ende ka pak k\u00ebrkime mbi m\u00ebnyrat se si censuruesit n\u00eb bot\u00ebn reale e kontrollojn\u00eb at\u00eb. <\/p>\n<p>Autor\u00ebt e studimit filluan me hulumtimin e teknikave t\u00eb censur\u00ebs q\u00eb mund t\u00eb aplikohen p\u00ebr CDN. M\u00eb pas ata studiuan mekanizmat real\u00eb q\u00eb p\u00ebrdorin autoritetet kineze. <\/p>\n<p>S\u00eb pari, le t\u00eb flasim p\u00ebr metodat e mundshme t\u00eb censurimit dhe mund\u00ebsin\u00eb e aplikimit t\u00eb tyre p\u00ebr kontrollin e CDN.<\/p>\n<h2>Filtrimi sipas IP<\/h2>\n<p>\nKjo \u00ebsht\u00eb teknika m\u00eb e thjesht\u00eb dhe m\u00eb e lir\u00eb e censur\u00ebs n\u00eb internet. Duke p\u00ebrdorur k\u00ebt\u00eb qasje, censori identifikon dhe vendos n\u00eb list\u00ebn e zez\u00eb adresat IP t\u00eb burimeve q\u00eb hostojn\u00eb p\u00ebrmbajtje t\u00eb ndaluar. M\u00eb pas, ofruesit e internetit n\u00ebn kontroll ndalojn\u00eb d\u00ebrgimin e pacak\u00ebve q\u00eb d\u00ebrgohen n\u00eb ato adresa. <\/p>\n<p>Bllokimi n\u00eb baz\u00eb t\u00eb IP \u00ebsht\u00eb nj\u00eb nga metodat m\u00eb t\u00eb zakonshme t\u00eb censur\u00ebs n\u00eb internet. Shumica e pajisjeve t\u00eb rrjeteve komerciale jan\u00eb t\u00eb pajisura me funksione p\u00ebr t\u00eb realizuar k\u00ebto bllokime pa ndonj\u00eb kosto t\u00eb madhe kompjuterike.<\/p>\n<p>Megjithat\u00eb, kjo metod\u00eb nuk \u00ebsht\u00eb shum\u00eb efektive p\u00ebr bllokimin e trafikut CDN p\u00ebr shkak t\u00eb disa karakteristikave t\u00eb teknologjis\u00eb vet\u00eb:<\/p>\n<ul>\n<li><b>Cache-imi i shp\u00ebrndar\u00eb<\/b> P\u00ebr t\u00eb siguruar disponueshm\u00ebrin\u00eb optimale t\u00eb p\u00ebrmbajtjes dhe p\u00ebr t\u00eb optimizuar performanc\u00ebn, rrjetet CDN cache-ojn\u00eb p\u00ebrmbajtjen e p\u00ebrdoruesve n\u00eb nj\u00eb num\u00ebr t\u00eb madh server\u00ebsh edge, t\u00eb vendosur n\u00eb lokacione gjeografikisht t\u00eb shp\u00ebrndara. P\u00ebr t\u00eb filtruar at\u00eb p\u00ebrmbajtje sipas IP, censori do t\u00eb duhet t\u00eb dij\u00eb adresat e t\u00eb gjitha server\u00ebve edge dhe t'i vendos\u00eb ato n\u00eb list\u00ebn e zez\u00eb. Kjo do t\u00eb godas\u00eb karakteristikat kryesore t\u00eb metod\u00ebs, pasi avantazhi kryesor \u00ebsht\u00eb se n\u00eb nj\u00eb skem\u00eb normale, bllokimi i nj\u00eb serveri lejon \"prerjen\" e aksesit n\u00eb p\u00ebrmbajtje t\u00eb ndaluar p\u00ebr nj\u00eb num\u00ebr t\u00eb madh njer\u00ebzish.<\/li>\n<li><b>IP t\u00eb p\u00ebrbashk\u00ebta<\/b> Ofruesit komercial\u00eb t\u00eb CDN ndajn\u00eb infrastruktur\u00ebn e tyre (p\u00ebrkat\u00ebsisht server\u00ebt edge, sistemin e mapimit, etj.) mes shum\u00eb klient\u00ebve. Si rezultat, p\u00ebrmbajtja e ndaluar CDN shp\u00ebrndahet nga t\u00eb nj\u00ebjtat adresa IP si edhe p\u00ebrmbajtja jo e ndaluar. Si rezultat, \u00e7do p\u00ebrpjekje e filtrimit sipas IP do t\u00eb \u00e7oj\u00eb n\u00eb bllokimin e nj\u00eb numri t\u00eb madh faqesh dhe p\u00ebrmbajtjes q\u00eb nuk intereson censuruesit. <\/li>\n<li><b>P\u00ebrshkall\u00ebzimi dinamik i IP<\/b> P\u00ebr t\u00eb optimizuar balancimin e ngarkes\u00ebs dhe p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar cil\u00ebsin\u00eb e sh\u00ebrbimit, mapimi i server\u00ebve edge dhe p\u00ebrdoruesve p\u00ebrfundimtar\u00eb realizohet shum\u00eb shpejt dhe dinamike. P\u00ebr shembull, Akamai p\u00ebrdit\u00ebson adresat IP q\u00eb kthehen \u00e7do minut\u00eb. Kjo do ta b\u00ebnte gati t\u00eb pamundur procesin e lidhjes s\u00eb adresave me p\u00ebrmbajtje t\u00eb ndaluar.<\/li>\n<\/ul>\n<p><\/p>\n<h2>Interferenca DNS<\/h2>\n<p>\nP\u00ebrve\u00e7 filtrimit t\u00eb IP-ve, nj\u00eb tjet\u00ebr m\u00ebnyr\u00eb e njohur e censur\u00ebs \u00ebsht\u00eb nd\u00ebrhyrja DNS. Ky qasje p\u00ebrfshin veprime t\u00eb censuruesve q\u00eb kan\u00eb p\u00ebr q\u00ebllim q\u00eb p\u00ebrdoruesit t\u00eb mos mund t\u00eb zbulojn\u00eb adresat IP t\u00eb burimeve me p\u00ebrmbajtje t\u00eb ndaluar. Kjo do t\u00eb thot\u00eb se nd\u00ebrhyrja ndodh n\u00eb nivelin e zgjidhjes s\u00eb emrave t\u00eb domain-it. Ka disa m\u00ebnyra p\u00ebr ta b\u00ebr\u00eb k\u00ebt\u00eb, duke p\u00ebrfshir\u00eb sulmet n\u00eb lidhjet DNS, p\u00ebrdorimin e teknik\u00ebs s\u00eb helmimit DNS, dhe bllokimin e k\u00ebrkesave DNS p\u00ebr faqet e ndaluara.<\/p>\n<p>Kjo \u00ebsht\u00eb nj\u00eb m\u00ebnyr\u00eb shum\u00eb efektive bllokimi, megjithat\u00eb mund t\u00eb anashkalohet n\u00ebse p\u00ebrdoren m\u00ebnyra t\u00eb pacaktuara p\u00ebr zgjidhjen e DNS-it, p\u00ebr shembull, kanale jasht\u00eb-bandi. Prandaj, zakonisht censuruesit kombinojn\u00eb bllokimet DNS me p\u00ebrdorimin e filtrimit t\u00eb IP-ve. Por, si\u00e7 u tha m\u00eb par\u00eb, filtrimi i IP-ve nuk \u00ebsht\u00eb efektiv p\u00ebr censurimin e p\u00ebrmbajtjes CDN.<\/p>\n<h2>Filtrimi sipas URL\/\u00c7el\u00ebsave me an\u00eb t\u00eb DPI <\/h2>\n<p>\nPajisjet moderne p\u00ebr monitorimin e aktivitetit n\u00eb rrjet mund t\u00eb p\u00ebrdoren p\u00ebr t\u00eb analizuar URL-t\u00eb e ve\u00e7anta dhe \u00e7el\u00ebsat n\u00eb paketat e dh\u00ebnave q\u00eb kalojn\u00eb. Kjo teknologji njihet si DPI (inspektimi i paketave t\u00eb thella). Sistemet e tilla i zbulojn\u00eb p\u00ebrmendjet e fjal\u00ebve dhe burimeve t\u00eb ndaluara, pas s\u00eb cil\u00ebs ndodh nd\u00ebrhyrja n\u00eb komunikimin online. Si rezultat, paketat thjesht hidhen. <\/p>\n<p>Kjo metod\u00eb \u00ebsht\u00eb efektive, por m\u00eb e komplikuar dhe k\u00ebrkon m\u00eb shum\u00eb burime, p\u00ebr shkak se k\u00ebrkon defragmentimin e t\u00eb gjitha pacotave t\u00eb dh\u00ebnave q\u00eb d\u00ebrgohen brenda nj\u00eb serie t\u00eb caktuar. <\/p>\n<p>P\u00ebrmbajtja CDN mund t\u00eb mbrohet nga nj\u00eb filtrimi t\u00eb till\u00eb nj\u00ebsoj si p\u00ebrmbajtja \"e zakonshme\" \u2013 n\u00eb t\u00eb dy rastet ndihmon p\u00ebrdorimi i enkriptimit (dmth, HTTPS).<\/p>\n<p>P\u00ebrve\u00e7 p\u00ebrdorimit t\u00eb DPI p\u00ebr t\u00eb gjetur \u00e7el\u00ebsat ose URL-t\u00eb e burimeve t\u00eb ndaluara, k\u00ebto mjete mund t\u00eb p\u00ebrdoren p\u00ebr nj\u00eb analiz\u00eb m\u00eb t\u00eb avancuar. K\u00ebto p\u00ebrfshijn\u00eb analiz\u00ebn statistike t\u00eb trafikut online\/offline dhe analiz\u00ebn e protokolleve t\u00eb identifikimit. K\u00ebto metoda jan\u00eb jasht\u00ebzakonisht k\u00ebrkuese p\u00ebr burime dhe aktualisht prova p\u00ebr p\u00ebrdorimin e tyre nga censuruesit n\u00eb nj\u00eb shkall\u00eb t\u00eb konsiderueshme thjesht nuk ekzistojn\u00eb.<\/p>\n<h2>Vet\u00ebcensura e ofruesve t\u00eb CDN<\/h2>\n<p>\nN\u00ebse censuruesi \u00ebsht\u00eb nj\u00eb shtet, at\u00ebher\u00eb ai ka t\u00eb gjitha mund\u00ebsit\u00eb p\u00ebr t\u00eb ndaluar pun\u00ebn n\u00eb vend t\u00eb ofruesve t\u00eb CDN q\u00eb nuk i p\u00ebrmbahen ligjeve vendase q\u00eb rregullojn\u00eb qasjen n\u00eb p\u00ebrmbajtje. Nuk ka asnj\u00eb m\u00ebnyr\u00eb p\u00ebr t\u00eb kund\u00ebrshtuar vet\u00ebcensur\u00ebn \u2013 prandaj n\u00ebse nj\u00eb kompani ofruese e CDN \u00ebsht\u00eb e interesuar t\u00eb punoj\u00eb n\u00eb nj\u00eb vend t\u00eb caktuar, ajo do t\u00eb detyrohet t\u00eb respektoj\u00eb ligjet vendase, edhe n\u00ebse ato kufizojn\u00eb lirin\u00eb e fjal\u00ebs.<\/p>\n<h2>Si Kina censuron p\u00ebrmbajtjen CDN<\/h2>\n<p>\nGjigandi kinez i zjarrit njihet si sistemi m\u00eb efektiv dhe m\u00eb i avancuar p\u00ebr sigurimin e censur\u00ebs n\u00eb internet. <\/p>\n<h3>Metodologjia e studimit<\/h3>\n<p>\nShkenc\u00ebtar\u00ebt kryen eksperimente me nj\u00eb nod\u00eb Linux t\u00eb vendosur brenda Kin\u00ebs. Po ashtu kishin akses n\u00eb disa kompjuter\u00eb jasht\u00eb vendit. Fillimisht, studiuesit kontrolluan se \u00e7far\u00eb kalonte n\u00ebp\u00ebr censur\u00ebn e ngjashme me at\u00eb q\u00eb u aplikohet p\u00ebrdoruesve t\u00eb tjer\u00eb kinez\u00eb \u2013 p\u00ebr k\u00ebt\u00eb ata provuan t\u00eb hapin nga kjo makin\u00eb disa faqe t\u00eb ndaluara. K\u00ebshtu u konfirmua se ishte e nj\u00ebjta nivel censur\u00eb. <\/p>\n<p>Lista e faqeve t\u00eb bllokuara n\u00eb Kin\u00eb q\u00eb p\u00ebrdorin CDN u mor nga faqja GreatFire.org. M\u00eb pas u krye analiza e m\u00ebnyr\u00ebs s\u00eb bllokimit n\u00eb \u00e7do rast. <\/p>\n<p>Sipas t\u00eb dh\u00ebnave t\u00eb hapura, ofruesi i vet\u00ebm i madh i tregut CDN me infrastruktur\u00eb t\u00eb vet n\u00eb Kin\u00eb \u00ebsht\u00eb Akamai. Ofruesit e tjer\u00eb t\u00eb p\u00ebrfshir\u00eb n\u00eb hulumtim jan\u00eb: CloudFlare, Amazon CloudFront, EdgeCast, Fastly dhe SoftLayer.<\/p>\n<p>Gjat\u00eb eksperimenteve, studiuesit zbuluan adresat e server\u00ebve edge t\u00eb Akamai brenda vendit, dhe m\u00eb pas provuan t\u00eb aksesojn\u00eb p\u00ebrmbajtjen e lejuar t\u00eb keshuar p\u00ebrmes tyre. Nuk arrit\u00ebn t\u00eb merrnin qasje n\u00eb p\u00ebrmbajtje t\u00eb ndaluar (u kthye nj\u00eb gabim HTTP 403 Forbidden) \u2013 \u00ebsht\u00eb e qart\u00eb se kompania kryen vet\u00ebcensur\u00eb p\u00ebr t\u00eb ruajtur mund\u00ebsin\u00eb e pun\u00ebs n\u00eb vend. Nd\u00ebrkoh\u00eb, jasht\u00eb vendit qasja n\u00eb k\u00ebto burime ishte e hapur.<\/p>\n<p>Ofruesit pa infrastruktur\u00eb n\u00eb Kin\u00eb nuk p\u00ebrdorin vet\u00ebcensur\u00ebn p\u00ebr p\u00ebrdoruesit vendas. <\/p>\n<p>N\u00eb rastin e ofruesve t\u00eb tjer\u00eb, m\u00ebnyra m\u00eb e shpesht\u00eb e bllokimit \u00ebsht\u00eb b\u00ebr\u00eb filtrimi DNS \u2013 k\u00ebrkesat p\u00ebr faqet e bllokuara zgjidhen n\u00eb adresa IP t\u00eb gabuara. N\u00eb k\u00ebt\u00eb rast, zjarri nuk bllokon vet\u00eb server\u00ebt edge t\u00eb CDN, pasi ata ruhen si informacion t\u00eb ndaluar ashtu edhe t\u00eb lejuar. <\/p>\n<p>Dhe n\u00ebse n\u00eb rastin e trafikut t\u00eb pazhvilluar autoritetet kan\u00eb mund\u00ebsin\u00eb t\u00eb bllokojn\u00eb faqe t\u00eb ve\u00e7anta t\u00eb faqeve duke p\u00ebrdorur DPI, at\u00ebher\u00eb kur p\u00ebrdoret HTTPS ata mund t\u00eb ndalojn\u00eb vet\u00ebm qasjen n\u00eb t\u00eb gjith\u00eb domain-in si t\u00ebr\u00ebsi. Kjo \u00e7on p\u00ebrfshir\u00eb n\u00eb bllokimin e p\u00ebrmbajtjes s\u00eb lejuar.<\/p>\n<p>P\u00ebr m\u00eb tep\u00ebr, n\u00eb Kin\u00eb ka gjithashtu ofrues t\u00eb vet CDN, duke p\u00ebrfshir\u00eb rrjete si ChinaCache, ChinaNetCenter dhe CDNetworks. T\u00eb gjitha k\u00ebto kompani plot\u00ebsisht zbatojn\u00eb legjislacionin e vendit dhe bllokojn\u00eb p\u00ebrmbajtjen e ndaluar.<\/p>\n<h2>CacheBrowser: nj\u00eb mjet p\u00ebr t\u00eb anashkaluar bllokadat p\u00ebrmes CDN<\/h2>\n<p>\nAnaliza tregoi se censori ka v\u00ebshtir\u00ebsi p\u00ebr t\u00eb bllokuar p\u00ebrmbajtjen e CDN. Prandaj, studiuesit vendos\u00ebn t\u00eb shkojn\u00eb p\u00ebrpara dhe t\u00eb zhvillojn\u00eb nj\u00eb instrument p\u00ebr anashkalimin e bllokadave online q\u00eb nuk do t\u00eb p\u00ebrdor\u00eb teknologjin\u00eb proxy. <\/p>\n<p>Ideja kryesore e instrumentit \u00ebsht\u00eb se p\u00ebr censurimin e CDN, censori duhet t\u00eb nd\u00ebrhyj\u00eb n\u00eb funksionimin e DNS, megjithat\u00eb, p\u00ebr t\u00eb ngarkuar p\u00ebrmbajtjen e CDN, nuk \u00ebsht\u00eb p\u00ebrgjith\u00ebsisht e nevojshme t\u00eb p\u00ebrdoret zgjidhja e emrave t\u00eb domain\u00ebve. k\u00ebshtu, p\u00ebrdoruesi mund t\u00eb marr\u00eb p\u00ebrmbajtjen q\u00eb i nevojitet duke kontaktuar drejtp\u00ebrdrejt me serverin edge, ku ajo \u00ebsht\u00eb tashm\u00eb e ruajtur. <\/p>\n<p>N\u00eb diagramin m\u00eb posht\u00eb \u00ebsht\u00eb paraqitur struktura e sistemit. <\/p>\n<p><img decoding=\"async\" alt=\"Eksperimenti CacheBrowser: kalimi p\u00ebrmes firewall-it kinez pa proxy duke p\u00ebrdorur caching t\u00eb p\u00ebrmbajtjes\" src=\"\/wp-content\/uploads\/2019\/09\/07d32c2f2118c8e2b8a09a6913ff978b.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSofti klient instalon n\u00eb kompjuterin e p\u00ebrdoruesit, p\u00ebr qasje n\u00eb p\u00ebrmbajtje p\u00ebrdoret nj\u00eb shfletues i zakonsh\u00ebm. <\/p>\n<p>Kur k\u00ebrkohet nj\u00eb URL ose nj\u00eb pjes\u00eb e p\u00ebrmbajtjes q\u00eb \u00ebsht\u00eb k\u00ebrkuar m\u00eb par\u00eb, shfletuesi d\u00ebrgon nj\u00eb k\u00ebrkes\u00eb n\u00eb sistemin lokal DNS (LocalDNS) p\u00ebr t\u00eb marr\u00eb adres\u00ebn IP t\u00eb hostimit. DNS-i i zakonsh\u00ebm k\u00ebrkohet vet\u00ebm p\u00ebr domain\u00ebt q\u00eb ende nuk jan\u00eb n\u00eb baz\u00ebn e t\u00eb dh\u00ebnave t\u00eb LocalDNS. Moduli Scraper vazhdimisht kalon n\u00ebp\u00ebr URL-t\u00eb e k\u00ebrkuara dhe k\u00ebrkon n\u00eb list\u00ebn e emrave t\u00eb domain\u00ebve q\u00eb mund t\u00eb blokohen. M\u00eb pas, Scraper i drejtohet modulit Resolver p\u00ebr t\u00eb zgjidhur domain\u00ebt e bllokuar t\u00eb sapo zbuluar, ky modul p\u00ebrfundon detyr\u00ebn dhe shton nj\u00eb hyrje n\u00eb LocalDNS. Pastaj, cache DNS i shfletuesit pastrohet p\u00ebr t\u00eb larguar regjistrimet e DNS t\u00eb ekzistuara p\u00ebr domene t\u00eb bllokuara.<\/p>\n<p>N\u00ebse moduli Resolver nuk mund t\u00eb kuptoj\u00eb se cilit ofrues CDN i p\u00ebrket domaini, ai do t\u00eb k\u00ebrkoj\u00eb ndihm\u00eb nga moduli Bootstrapper.<\/p>\n<h2>Si funksionon n\u00eb praktik\u00eb<\/h2>\n<p>\nSofti klient i produktit \u00ebsht\u00eb realizuar p\u00ebr Linux, por mund t\u00eb portet leht\u00ebsisht edhe p\u00ebr Windows. Nj\u00eb shfletues i zakonsh\u00ebm p\u00ebrdoret, si Mozilla<br \/>\nFirefox. Modul\u00ebt Scraper dhe Resolver jan\u00eb shkruar n\u00eb Python, dhe bazat e t\u00eb dh\u00ebnave Customer-to-CDN dhe CDN-to-IP ruhen n\u00eb skedar\u00eb .txt. Baza e t\u00eb dh\u00ebnave LocalDNS \u00ebsht\u00eb nj\u00eb skedar i zakonsh\u00ebm \/etc\/hosts n\u00eb Linux.<\/p>\n<p>P\u00ebrfundimisht, p\u00ebr nj\u00eb URL t\u00eb bllokuar t\u00eb tipit <noindex><a rel=\"nofollow\" href=\"https:\/\/blocked.com\/\">blocked.com<\/a><\/noindex> skripti do t\u00eb marr\u00eb adres\u00ebn IP t\u00eb serverit edge nga skedari \/etc\/hosts dhe do t\u00eb d\u00ebrgoj\u00eb nj\u00eb k\u00ebrkes\u00eb HTTP GET p\u00ebr t\u00eb hyr\u00eb n\u00eb BlockedURL.html me fushat e titullit HTTP Host:<\/p>\n<pre><code class=\"bash\">blocked.com\/ dhe User-Agent: Mozilla\/5.0 (Windows NT 5.1; rv:14.0) Gecko\/20100101 Firefox\/14.0.1<\/code><\/pre>\n<p>\nModuli Bootstrapper \u00ebsht\u00eb realizuar me ndihm\u00ebn e mjetit falas digwebinterface.com. Ky DNS-resolver nuk mund t\u00eb bllokohet dhe ai p\u00ebrgjigjet n\u00eb k\u00ebrkesat DNS n\u00eb em\u00ebr t\u00eb shum\u00eb server\u00ebve DNS t\u00eb shp\u00ebrndar\u00eb gjeografikisht n\u00eb rajone t\u00eb ndryshme t\u00eb rrjetit.<\/p>\n<p>Me ndihm\u00ebn e k\u00ebtij instrumenti, studiuesit arrit\u00ebn t\u00eb qasjejn\u00eb n\u00eb Facebook nga nodi i tyre kinez \u2013 edhe pse rrjeti social \u00ebsht\u00eb bllokuar p\u00ebr nj\u00eb koh\u00eb t\u00eb gjat\u00eb n\u00eb Kin\u00eb.<\/p>\n<p><img decoding=\"async\" alt=\"Eksperimenti CacheBrowser: kalimi p\u00ebrmes firewall-it kinez pa proxy duke p\u00ebrdorur caching t\u00eb p\u00ebrmbajtjes\" src=\"\/wp-content\/uploads\/2019\/09\/f33cf0e1544785bdb84234a4ac39f727.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>P\u00ebrfundimi<\/h2>\n<p>\nEksperimentimi tregoi se problemet q\u00eb censuruesit hasin n\u00eb p\u00ebrpjekjet p\u00ebr t\u00eb bllokuar p\u00ebrmbajtjen e CDN mund t\u00eb p\u00ebrdoren p\u00ebr t\u00eb krijuar nj\u00eb sistem anashkalimi. Ky instrument lejon anashkalimin e bllokimeve edhe n\u00eb Kin\u00eb, ku vepron nj\u00eb nga sistemi m\u00eb t\u00eb fuqish\u00ebm t\u00eb censur\u00ebs online.<\/p>\n<h2>Artikuj t\u00eb tjer\u00eb n\u00eb lidhje me p\u00ebrdorimin e <noindex><a rel=\"nofollow\" href=\"https:\/\/infatica.io\">proxies rezidenciale<\/a><\/noindex> p\u00ebr biznesin:<\/h2>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/infatica\/blog\/460509\/\">Si ndihmojn\u00eb proxy-t rezident\u00eb n\u00eb biznes: nj\u00eb rast real i p\u00ebrdorimit t\u00eb Infatica n\u00eb fush\u00ebn e Data Mining<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/infatica\/blog\/461537\/\">Analiz\u00eb. Si funksionon SOCKS proxy: p\u00ebrpar\u00ebsit\u00eb, disavantazhet, dallimet nga teknologjit\u00eb e tjera<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/infatica\/blog\/454442\/\">Si si duhet t\u00eb zgjidhni nj\u00eb rrjet proxy p\u00ebr biznesin: 3 k\u00ebshilla praktike<\/a><\/noindex><\/li>\n<\/ul>\n<p>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/infatica\/blog\/467201\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0435: Unsplash \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u0430\u044f \u0447\u0430\u0441\u0442\u044c \u0432\u0441\u0435\u0433\u043e \u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430 \u0432 \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442\u0435 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c CDN-\u0441\u0435\u0442\u0435\u0439. \u041f\u0440\u0438 \u044d\u0442\u043e\u043c \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0439 \u0442\u043e\u0433\u043e, \u043a\u0430\u043a \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0435 \u0446\u0435\u043d\u0437\u043e\u0440\u044b \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u044e\u0442 \u0441\u0432\u043e\u0435 \u0432\u043b\u0438\u044f\u043d\u0438\u0435 \u043d\u0430 \u0442\u0430\u043a\u0438\u0435 \u0441\u0435\u0442\u0438. \u0423\u0447\u0435\u043d\u044b\u0435 \u0438\u0437 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 \u041c\u0430\u0441\u0441\u0430\u0447\u0443\u0441\u0435\u0442\u0441\u0430 \u043f\u0440\u043e\u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043b\u0438 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0442\u043e\u0434\u044b \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0438 CDN-\u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430 \u043d\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u0435 \u043f\u0440\u0430\u043a\u0442\u0438\u043a \u0432\u043b\u0430\u0441\u0442\u0435\u0439 \u041a\u0438\u0442\u0430\u044f, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043b\u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442 \u043e\u0431\u0445\u043e\u0434\u0430 \u0442\u0430\u043a\u0438\u0445 \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043e\u043a. \u041c\u044b \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u0438\u043b\u0438 \u043e\u0431\u0437\u043e\u0440\u043d\u044b\u0439 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b \u0441 \u0433\u043b\u0430\u0432\u043d\u044b\u043c\u0438 \u0432\u044b\u0432\u043e\u0434\u0430\u043c\u0438 \u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":28594,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-38090","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0418\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0435: Unsplash \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u0430\u044f \u0447\u0430\u0441\u0442\u044c \u0432\u0441\u0435\u0433\u043e \u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430 \u0432 \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442\u0435 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