{"id":80500,"date":"2020-05-06T13:42:29","date_gmt":"2020-05-06T11:42:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/protokoly-sftp-i-ftps"},"modified":"2020-05-06T13:42:29","modified_gmt":"2020-05-06T11:42:29","slug":"protokoly-sftp-i-ftps","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/protokoly-sftp-i-ftps","title":{"rendered":"Protokollet SFTP dhe FTPS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<h1>Parath\u00ebnie<\/h1>\n<p><\/p>\n<p>Para nj\u00eb jav\u00eb, un\u00eb shkrova nj\u00eb ese mbi tem\u00ebn e p\u00ebrmendur n\u00eb titull dhe u p\u00ebrballa me faktin se, le t\u00eb themi, informacione p\u00ebrdorimore nuk ka kaq shum\u00eb n\u00eb internet. Kryesisht ka vet\u00ebm fakte t\u00eb thata dhe udh\u00ebzime p\u00ebr konfigurimin. Prandaj, vendosa t\u00eb rregulloja pak tekstin dhe ta publikoj si nj\u00eb artikull.<\/p>\n<p>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h1>\u00c7far\u00eb \u00ebsht\u00eb FTP<\/h1>\n<p><\/p>\n<p>FTP (Protokolli i Transferimit t\u00eb Skedar\u00ebve) \u2013 \u00ebsht\u00eb nj\u00eb protokoll p\u00ebr transferimin e skedar\u00ebve n\u00eb rrjet. Ai \u00ebsht\u00eb nj\u00eb nga protokollet baz\u00eb t\u00eb Ethernet. U shfaq n\u00eb vitin 1971 dhe fillimisht ka funksionuar n\u00eb rrjetet e DARPA. Tani, ashtu si dhe HTTP, transferimi i skedar\u00ebve bazohet n\u00eb nj\u00eb model q\u00eb p\u00ebrfshin nj\u00eb grup protokollesh TCP\/IP (Protokolli i Kontrollit t\u00eb Transferimit\/Protokolli i Internetit). \u00cbsht\u00eb p\u00ebrcaktuar n\u00eb RFC 959.<\/p>\n<p><\/p>\n<p>Protokolli p\u00ebrcakton t\u00eb following:<\/p>\n<\/p>\n<ul>\n<li>Si do t\u00eb b\u00ebhet kontrolli p\u00ebr gabime<\/li>\n<li>Metoda e paketimit t\u00eb t\u00eb dh\u00ebnave (n\u00ebse p\u00ebrdoret paketimi)<\/li>\n<li>Si i d\u00ebrgon pajisja d\u00ebrguese sinjalin se ka p\u00ebrfunduar mesazhin<\/li>\n<li>Si pajisja marr\u00ebse tregon se ka pranuar mesazhin<\/li>\n<\/ul>\n<p><\/p>\n<h2>Interaksioni nd\u00ebrmjet klientit dhe serverit<\/h2>\n<p><\/p>\n<p>Le t\u00eb shqyrtojm\u00eb proceset q\u00eb ndodhin gjat\u00eb funksionimit t\u00eb FTP-s\u00eb m\u00eb n\u00eb detaje. Koneksioni inicializohet nga interpretuesi i protokollit t\u00eb p\u00ebrdoruesit. Menaxhimi i shk\u00ebmbimit b\u00ebhet p\u00ebrmes nj\u00eb kanali menaxhimi sipas standartit TELNET. Komandat FTP gjenerohen nga interpretuesi i protokollit t\u00eb p\u00ebrdoruesit dhe d\u00ebrgohen n\u00eb server. P\u00ebgjigjet e serverit d\u00ebrgohen po ashtu te p\u00ebrdoruesi p\u00ebrmes kanalit t\u00eb menaxhimit. N\u00eb rastin e zakonsh\u00ebm, p\u00ebrdoruesi ka mund\u00ebsin\u00eb t\u00eb krijoj\u00eb kontakt me interpretuesin e protokollit t\u00eb serverit me mjete t\u00eb ndryshme nga ato t\u00eb interpretuesit t\u00eb p\u00ebrdoruesit.<\/p>\n<p><\/p>\n<p>Ve\u00e7oria kryesore e FTP-s\u00eb \u00ebsht\u00eb se p\u00ebrdor nj\u00eb lidhje t\u00eb dyfisht\u00eb. Nj\u00ebra nga ato p\u00ebrdoret p\u00ebr t\u00eb d\u00ebrguar komanda n\u00eb server dhe ndodh p\u00ebr default p\u00ebrmes portit TCP 21, i cili mund t\u00eb ndryshohet. Lidhja menaxhuese ekziston gjith\u00eb koh\u00ebn sa klienti komunikon me serverin. Kanali i menaxhimit duhet t\u00eb jet\u00eb i hapur gjat\u00eb transferimit t\u00eb t\u00eb dh\u00ebnave nd\u00ebrmjet makinave. N\u00ebse ajo mbyllet, transferimi i t\u00eb dh\u00ebnave ndalon. P\u00ebrmes lidhjes s\u00eb dyt\u00eb ndodh transferimi direkt i t\u00eb dh\u00ebnave. Kjo hapet \u00e7do her\u00eb kur kryhet nj\u00eb transferim i skedar\u00ebve nd\u00ebrmjet klientit dhe serverit. N\u00ebse disa skedar\u00eb transferohen nj\u00ebkoh\u00ebsisht, p\u00ebr secilin prej tyre hapet nj\u00eb kanal transferimi i ve\u00e7ant\u00eb.<\/p>\n<p><\/p>\n<p>FTP mund t\u00eb funksionoj\u00eb n\u00eb m\u00ebnyr\u00eb aktive ose pasive, nga zgjedhja e s\u00eb cil\u00ebs varet m\u00ebnyra e krijimit t\u00eb lidhjes. N\u00eb m\u00ebnyr\u00ebn aktive, klienti krijon nj\u00eb lidhje menaxhuese TCP me serverin dhe i d\u00ebrgon atij adres\u00ebn e tij IP dhe nj\u00eb num\u00ebr porti t\u00eb rast\u00ebsish\u00ebm, pas t\u00eb cilit pret q\u00eb serveri t\u00eb filloj\u00eb nj\u00eb lidhje TCP me k\u00ebt\u00eb adres\u00eb dhe num\u00ebr porti. N\u00ebse klienti \u00ebsht\u00eb pas nj\u00eb mur zjarrmi dhe nuk mund t\u00eb pranoj\u00eb lidhje TCP t\u00eb hyra, mund t\u00eb p\u00ebrdoret m\u00ebnyra pasive. N\u00eb k\u00ebt\u00eb m\u00ebnyr\u00eb, klienti p\u00ebrdor kanalin e menaxhimit p\u00ebr t\u2019i d\u00ebrguar serverit komand\u00ebn PASV, dhe m\u00eb pas merr nga serveri adres\u00ebn e tij IP dhe numrin e portit, t\u00eb cilat m\u00eb pas p\u00ebrdoren nga klienti p\u00ebr t\u00eb hapur nj\u00eb kanalin e t\u00eb dh\u00ebnave nga porti i tij t\u00eb rast\u00ebsish\u00ebm. <\/p>\n<p><\/p>\n<p>Ka mund\u00ebsi q\u00eb t\u00eb dh\u00ebnat t\u00eb transferohen n\u00eb nj\u00eb makin\u00eb t\u00eb tret\u00eb. N\u00eb k\u00ebt\u00eb rast, p\u00ebrdoruesi organizon nj\u00eb kanal menaxhimi me dy servera dhe organizon nj\u00eb kanal t\u00eb drejtp\u00ebrdrejt t\u00eb t\u00eb dh\u00ebnave nd\u00ebrmjet tyre. Komandat e menaxhimit kalojn\u00eb p\u00ebrmes p\u00ebrdoruesit, nd\u00ebrsa t\u00eb dh\u00ebnat transferohen direkt nd\u00ebrmjet serverave.<\/p>\n<p><\/p>\n<p>Gjat\u00eb transferimit t\u00eb t\u00eb dh\u00ebnave mbi rrjet mund t\u00eb p\u00ebrdoren kat\u00ebr p\u00ebrfytyrime t\u00eb t\u00eb dh\u00ebnave:<\/p>\n<p><\/p>\n<ul>\n<li>ASCII \u2013 p\u00ebrdoret p\u00ebr tekst. T\u00eb dh\u00ebnat, n\u00ebse \u00ebsht\u00eb e nevojshme, konvertohen para transferimit nga p\u00ebrfaq\u00ebsimi karakteror n\u00eb hostin d\u00ebrgues n\u00eb \"ASCII me tet\u00eb bit\u00eb\", dhe (po ashtu, n\u00ebse \u00ebsht\u00eb e nevojshme) n\u00eb p\u00ebrfaq\u00ebsimin karakteror t\u00eb hostit marr\u00ebs. N\u00eb k\u00ebt\u00eb rast, ndryshojn\u00eb simbolet p\u00ebr kalimin e linj\u00ebs. Si pasoj\u00eb, ky mod p\u00ebrdoret p\u00ebr skedar\u00eb q\u00eb p\u00ebrmbajn\u00eb vet\u00ebm tekst t\u00eb zakonsh\u00ebm.<\/li>\n<li>M\u00ebnyra binarike \u2013 pajisja d\u00ebrguese d\u00ebrgon \u00e7do skedar byte p\u00ebr byte, nd\u00ebrsa marr\u00ebsi ruan fluxin e byteve gjat\u00eb marrjes. Mb\u00ebshtetje p\u00ebr k\u00ebt\u00eb mod \u00ebsht\u00eb rekomanduar p\u00ebr t\u00eb gjitha realizimet e FTP.<\/li>\n<li>EBCDIC \u2013 p\u00ebrdoret p\u00ebr transferimin e tekstit t\u00eb zakonsh\u00ebm nd\u00ebrmjet hosteve n\u00eb kodimin EBCDIC. P\u00ebrndryshe, ky mod \u00ebsht\u00eb i ngjash\u00ebm me modin ASCII.<\/li>\n<li>M\u00ebnyra lokale \u2013 lejon dy kompjuter\u00eb me konfigurime identike t\u00eb d\u00ebrgojn\u00eb t\u00eb dh\u00ebna n\u00eb formatin e tyre t\u00eb egen duke mos b\u00ebr\u00eb konvertimin n\u00eb ASCII.<\/li>\n<\/ul>\n<p><\/p>\n<p>Transferimi i t\u00eb dh\u00ebnave mund t\u00eb kryhet n\u00eb cilindo nga tre modet:<\/p>\n<p><\/p>\n<ul>\n<li>M\u00ebnyra e k\u00ebtij transferimi \u2013 t\u00eb dh\u00ebnat d\u00ebrgohen si nj\u00eb flux t\u00eb vazhduesh\u00ebm, duke e liruar FTP-n\u00eb nga t\u00eb b\u00ebrit \u00e7do lloj p\u00ebrpunimi. N\u00eb vend t\u00eb k\u00ebsaj, e gjith\u00eb p\u00ebrpunimi kryhet nga TCP. Nj\u00eb tregues i fundit t\u00eb skedarit nuk \u00ebsht\u00eb i nevojsh\u00ebm, p\u00ebrve\u00e7 ndarjes s\u00eb t\u00eb dh\u00ebnave n\u00eb regjistra.<\/li>\n<li>Rejimi bllok \u2013 FTP e ndan t\u00eb dh\u00ebnat n\u00eb disa blloqe (blloku i titullit, numri i bajtave, fusha e t\u00eb dh\u00ebnave) dhe m\u00eb pas i transmeton ato p\u00ebrmes TCP.<\/li>\n<li>Rejimi i kompresimit \u2013 t\u00eb dh\u00ebnat kompresohen me nj\u00eb algorit\u00ebm t\u00eb vet\u00ebm (zakonisht me kodimin e seri t\u00eb gjata).<\/li>\n<\/ul>\n<p><\/p>\n<p>Serveri FTP \u00ebsht\u00eb nj\u00eb server q\u00eb mb\u00ebshtet p\u00ebrdorimin e protokollit t\u00eb transferimit t\u00eb skedar\u00ebve. Ai ka disa ve\u00e7ori q\u00eb e ndajn\u00eb at\u00eb nga server\u00ebt e zakonsh\u00ebm t\u00eb uebit:<\/p>\n<p><\/p>\n<ul>\n<li>Nevojitet identifikimi i p\u00ebrdoruesve<\/li>\n<li>T\u00eb gjitha operacionet kryhen brenda sesionit aktual<\/li>\n<li>Mund\u00ebsia p\u00ebr t\u00eb kryer veprime t\u00eb ndryshme me sistemin e skedar\u00ebve<\/li>\n<li>P\u00ebrdoret nj\u00eb kanal i ve\u00e7ant\u00eb p\u00ebr \u00e7do lidhje<\/li>\n<\/ul>\n<p><\/p>\n<p>Klienti FTP \u00ebsht\u00eb nj\u00eb program q\u00eb lejon lidhjen me nj\u00eb server t\u00eb larg\u00ebt p\u00ebrmes FTP dhe gjithashtu kryen veprimet e nevojshme me element\u00ebt e sistemit t\u00eb skedar\u00ebve. Nj\u00eb shfletues mund t\u00eb funksionoj\u00eb si klient, duke futur n\u00eb shiritin e adres\u00ebs adres\u00ebn q\u00eb p\u00ebrfaq\u00ebson nj\u00eb rrug\u00eb deri n\u00eb nj\u00eb katalog ose skedar t\u00eb caktuar n\u00eb serverin e larg\u00ebt, n\u00eb p\u00ebrputhje me skem\u00ebn e p\u00ebrgjithshme t\u00eb URL:<\/p>\n<p><\/p>\n<p><code>ftp:\/\/user:pass@address:port\/directory\/file<\/code><\/p>\n<p><\/p>\n<p>Megjithat\u00eb, p\u00ebrdorimi i shfletuesit web n\u00eb k\u00ebt\u00eb m\u00ebnyr\u00eb lejon vet\u00ebm shikimin ose shkarkimin e skedar\u00ebve t\u00eb interesit. P\u00ebr t\u00eb shfryt\u00ebzuar t\u00eb gjitha p\u00ebrfitimet e FTP, duhet p\u00ebrdorur nj\u00eb software i specializuar si klient. <\/p>\n<p><\/p>\n<p>Identifikimi i FTP p\u00ebrdor nj\u00eb skem\u00eb emri p\u00ebrdoruesi\/fjal\u00ebkalimi p\u00ebr t\u00eb ofruar akses. Emri i p\u00ebrdoruesit d\u00ebrgohet serverit me komand\u00ebn USER, nd\u00ebrsa fjala kalim d\u00ebrgohet me komand\u00ebn PASS. N\u00ebse informacioni i dh\u00ebn\u00eb nga klienti pranohet nga serveri, at\u00ebher\u00eb serveri i d\u00ebrgon klientit nj\u00eb ftes\u00eb dhe nisi nj\u00eb sesion. P\u00ebrdoruesit mund, n\u00ebse serveri e mb\u00ebshtet k\u00ebt\u00eb ve\u00e7ori, t\u00eb hyjn\u00eb n\u00eb sistem pa ofruar kredencialet, por serveri mund t\u00eb ofroj\u00eb vet\u00ebm akses t\u00eb kufizuar p\u00ebr k\u00ebto sesione.<\/p>\n<p><\/p>\n<p>Host-i q\u00eb ofron sh\u00ebrbimin FTP mund t\u00eb ofroj\u00eb akses anonim n\u00eb FTP. P\u00ebrdoruesit zakonisht hyjn\u00eb si \"anonymous\" (mund t\u00eb jet\u00eb karakter ndjesh\u00ebm n\u00eb disa server\u00eb FTP) si emri i p\u00ebrdoruesit. Edhe pse zakonisht k\u00ebrkohet q\u00eb p\u00ebrdoruesit t\u00eb d\u00ebrgojn\u00eb adres\u00ebn e tyre t\u00eb emailit n\u00eb vend t\u00eb fjal\u00ebkalimit, asnj\u00eb verifikim nuk kryhet realisht. Shum\u00eb hoste FTP, q\u00eb ofrojn\u00eb p\u00ebrdit\u00ebsime softuerike, mb\u00ebshtesin aksesin anonim.<\/p>\n<p><\/p>\n<h2>Skema e protokollit<\/h2>\n<p><\/p>\n<p>Nd\u00ebrveprimi \"klient-server\" n\u00eb lidhjen FTP mund t\u00eb p\u00ebrshkruhet n\u00eb k\u00ebt\u00eb m\u00ebnyr\u00eb:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Protokollet SFTP dhe FTPS\" src=\"\/wp-content\/uploads\/2020\/05\/9513d1898a0938a30b0f87d7956bc98f.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h1>FTP i sigurt<\/h1>\n<p><\/p>\n<p>FTP nuk \u00ebsht\u00eb nd\u00ebrtuar fillimisht si i sigurt, pasi kishte p\u00ebr q\u00ebllim komunikimin midis disa objekteve dhe institucioneve ushtarake. Por me zhvillimin dhe p\u00ebrhapjen e internetit, rreziku i qasjes s\u00eb paautorizuar \u00ebsht\u00eb rritur shum\u00ebfish. Ka lindur nevoja p\u00ebr t\u00eb mbrojtur server\u00ebt nga lloje t\u00eb ndryshme sulmesh. N\u00eb maj 1999, autor\u00ebt e RFC 2577 grupuan dob\u00ebsit\u00eb n\u00eb k\u00ebt\u00eb list\u00eb problemi:<\/p>\n<p><\/p>\n<ul>\n<li>Sulmet e fshehura (bounce attacks)<\/li>\n<li>Sulmet e spoof (spoof attacks)<\/li>\n<li>Sulmet me forc\u00eb brutale (brute force attacks)<\/li>\n<li>Kapja e paketeve, sniffing (packet capture, sniffing)<\/li>\n<li>Kapja e portave (port stealing)<\/li>\n<\/ul>\n<p><\/p>\n<p>FTP i zakonsh\u00ebm nuk ka mund\u00ebsin\u00eb p\u00ebr t\u00eb transferuar t\u00eb dh\u00ebna n\u00eb form\u00eb t\u00eb enkriptuar, si pasoj\u00eb, emrat e p\u00ebrdoruesve, fjal\u00ebkalimet, komandat dhe informacioni tjet\u00ebr mund t\u00eb kapen leht\u00ebsisht nga sulmuesit. Zgjidhja standarde p\u00ebr k\u00ebt\u00eb problem \u00ebsht\u00eb p\u00ebrdorimi i versioneve \"t\u00eb sigurta\", t\u00eb mbrojtura nga TLS t\u00eb protokolleve t\u00eb vulnerab\u00ebl (FTPS) ose nj\u00eb protokoll tjet\u00ebr m\u00eb t\u00eb sigurt, si SFTP\/SCP, q\u00eb ofrohen nga shumica e implementimeve t\u00eb protokollit Secure Shell.<\/p>\n<p><\/p>\n<h2>FTPS<\/h2>\n<p><\/p>\n<p>FTPS (FTP + SSL) \u2013 \u00ebsht\u00eb nj\u00eb zgjerim i protokollit standard t\u00eb transferimit t\u00eb skedar\u00ebve, q\u00eb shton n\u00eb funksionalitetin e tij bazik mund\u00ebsin\u00eb p\u00ebr t\u00eb krijuar sesione t\u00eb enkriptuara duke p\u00ebrdorur protokollin SSL (Secure Sockets Layer \u2013 niveli i soketeve t\u00eb mbrojtura). Sot mbrojtja sigurohet nga analogu i tij m\u00eb t\u00eb avancuar TLS (Transport Layer Security \u2013 mbrojtja e nivelit t\u00eb transportit).<\/p>\n<p><\/p>\n<h3>SSL<\/h3>\n<p><\/p>\n<p>Protokolli SSL u propozuar nga kompania Netscape Communications n\u00eb vitin 1996 me q\u00ebllimin e sigurimit t\u00eb siguris\u00eb dhe fsheht\u00ebsis\u00eb s\u00eb lidhjeve n\u00eb internet. Protokolli mb\u00ebshtet identifikimin (v\u00ebrtetimin) e klientit dhe serverit, nuk varett nga aplikacionet dhe \u00ebsht\u00eb transparent p\u00ebr protokollet HTTP, FTP dhe Telnet.<\/p>\n<p><\/p>\n<p>Protokolli SSL Handshake p\u00ebrb\u00ebhet nga dy faza: v\u00ebrtetimi i serverit dhe v\u00ebrtetim i opsional i klientit. N\u00eb faz\u00ebn e par\u00eb, serveri, n\u00eb p\u00ebrgjigje t\u00eb k\u00ebrkes\u00ebs s\u00eb klientit, d\u00ebrgon certifikat\u00ebn e tij dhe parametrat e enkriptimit. Pastaj klienti gjeneron nj\u00eb \u00e7el\u00ebs master, e enkripton at\u00eb me \u00e7el\u00ebsin publik t\u00eb serverit dhe ia d\u00ebrgon serverit. Serveri e dekripton \u00e7el\u00ebsin master me \u00e7el\u00ebsin e tij privat dhe konfirmon v\u00ebrtet\u00ebsin\u00eb e tij p\u00ebr klientin, duke i kthyer nj\u00eb mesazh t\u00eb vulosur me \u00e7el\u00ebsin master t\u00eb klientit.<\/p>\n<p><\/p>\n<p>T\u00eb dh\u00ebnat e m\u00ebtejshme enkriptohen dhe verifikohen me \u00e7el\u00ebsat e marr\u00eb n\u00eb baz\u00eb t\u00eb k\u00ebtij \u00e7el\u00ebsi-master. N\u00eb faz\u00ebn e dyt\u00eb, e cila nuk \u00ebsht\u00eb e detyrueshme, serveri d\u00ebrgon nj\u00eb k\u00ebrkes\u00eb klientit, dhe klienti e konfirmon autentikimin e tij ndaj serverit duke kthyer k\u00ebrkes\u00ebn me n\u00ebnshkrimin digjital dhe certifikat\u00ebn e \u00e7el\u00ebsit publik.<\/p>\n<p><\/p>\n<p>SSL mb\u00ebshtet nj\u00eb shum\u00ebllojshm\u00ebri algoritmesh kriptografik\u00eb. Gjat\u00eb vendosjes s\u00eb lidhjes, p\u00ebrdoret sistemi i \u00e7el\u00ebsit t\u00eb hapur RSA. Pas shk\u00ebmbimit t\u00eb \u00e7el\u00ebsave, p\u00ebrdoren shum\u00eb enigma t\u00eb ndryshme: RC2, RC4, IDEA, DES dhe TripleDES. Po ashtu p\u00ebrdoret MD5 - algoritmi p\u00ebr krijimin e mesazheve digeste. Sintaksa e certifikatave t\u00eb \u00e7el\u00ebsit publik p\u00ebrshkruhet n\u00eb X.509.<\/p>\n<p><\/p>\n<p>Nj\u00eb nga avantazhet e r\u00ebnd\u00ebsishme t\u00eb SSL \u00ebsht\u00eb pavar\u00ebsia e tij e plot\u00eb nga platformat dhe programet. Protokolli \u00ebsht\u00eb zhvilluar mbi parimet e portabilitetit, dhe ideologjia e nd\u00ebrtimit t\u00eb tij nuk varet nga aplikacionet me t\u00eb cilat p\u00ebrdoret. P\u00ebrve\u00e7 k\u00ebsaj, \u00ebsht\u00eb e r\u00ebnd\u00ebsishme q\u00eb mbi protokollin SSL mund t\u00eb vendosen pa probleme protokolle t\u00eb tjera; ose p\u00ebr t\u00eb rritur m\u00eb tej nivelin e mbrojtjes s\u00eb rrjedhave informative, ose p\u00ebr t\u00eb adaptuar aft\u00ebsit\u00eb kriptografike t\u00eb SSL p\u00ebr ndonj\u00eb detyr\u00eb tjet\u00ebr t\u00eb caktuar.<\/p>\n<p><\/p>\n<h3>Lidhja SSL<\/h3>\n<p>\n<img decoding=\"async\" alt=\"Protokollet SFTP dhe FTPS\" src=\"\/wp-content\/uploads\/2020\/05\/5c002ffba19382c1d3b330d7c948692b.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Kanalin e siguruar SSL ka tri vet\u00ebsi kryesore: <\/p>\n<p><\/p>\n<ul>\n<li>Kanalin \u00ebsht\u00eb privat. Enkriptimi p\u00ebrdoret p\u00ebr t\u00eb gjitha mesazhet pas nj\u00eb dialogu t\u00eb thjesht\u00eb, q\u00eb sh\u00ebrben p\u00ebr t\u00eb p\u00ebrcaktuar \u00e7el\u00ebsin sekret.<\/li>\n<li>Kanalin \u00ebsht\u00eb autentik. Ana e serverit t\u00eb dialogut gjithmon\u00eb autentikohet, nd\u00ebrsa ana e klientit autentikohet opsionalisht.<\/li>\n<li>Kanalin \u00ebsht\u00eb i besuesh\u00ebm. Transporti i mesazheve p\u00ebrfshin verifikimin e integritetit (n\u00ebp\u00ebrmjet MAC).<\/li>\n<\/ul>\n<p><\/p>\n<h3>Karakteristikat e FTPS<\/h3>\n<p><\/p>\n<p>Ka dy realizime t\u00eb FTPS, t\u00eb cilat p\u00ebrdorin metoda t\u00eb ndryshme p\u00ebr sigurimin e siguris\u00eb: <\/p>\n<p><\/p>\n<ul>\n<li>Metoda e fsheht\u00eb n\u00ebnkupton p\u00ebrdorimin e protokollit standard SSL me vendosjen e sesionit p\u00ebrpara d\u00ebrgimit t\u00eb t\u00eb dh\u00ebnave, e cila, nga ana tjet\u00ebr, d\u00ebmton kompatibilitetin me klient\u00ebt dhe server\u00ebt e zakonsh\u00ebm FTP. P\u00ebr t\u00eb ruajtur kompatibilitetin me klient\u00ebt q\u00eb nuk mb\u00ebshtesin FTPS, p\u00ebr lidhjen e kontrollit p\u00ebrdoret porta TCP 990, dhe p\u00ebr d\u00ebrgimin e t\u00eb dh\u00ebnave - 989. Kjo lejon ruajtjen e port\u00ebs standarde 21 p\u00ebr protokollin FTP. Kjo metod\u00eb \u00ebsht\u00eb e njohur si e vjet\u00ebruar.<\/li>\n<li>Metoda e hapur \u00ebsht\u00eb shum\u00eb m\u00eb e p\u00ebrshtatshme, pasi p\u00ebrdor komandat standarde FTP, por gjat\u00eb p\u00ebrgjigjes enkripton t\u00eb dh\u00ebnat, duke lejuar p\u00ebrdorimin e t\u00eb nj\u00ebjt\u00ebs lidhje menaxhuese p\u00ebr FTP dhe FTPS. Klienti duhet t\u00eb k\u00ebrkoj\u00eb shprehimisht transmetimin e sigurt t\u00eb t\u00eb dh\u00ebnave nga serveri dhe m\u00eb pas t\u00eb miratoj\u00eb metod\u00ebn e kodimit. N\u00ebse klienti nuk k\u00ebrkon transmetim t\u00eb sigurt, serveri FTPS ka t\u00eb drejt\u00eb t\u00eb ruaj\u00eb ose t\u00eb mbyll\u00eb lidhjen q\u00eb nuk \u00ebsht\u00eb e mbrojtur. Mekanizmi i negociat\u00ebs p\u00ebr identifikimin dhe mbrojtjen e t\u00eb dh\u00ebnave u shtua sipas RFC 2228, i cili p\u00ebrfshin nj\u00eb komand\u00eb t\u00eb re FTP AUTH. Megjithat\u00eb, ky standard nuk p\u00ebrcakton qart\u00eb mekanizmat e mbrojtjes, por p\u00ebrcakton q\u00eb lidhjen e sigurt duhet ta niste klienti duke p\u00ebrdorur algoritmin e p\u00ebrshkruar m\u00eb lart. N\u00ebse lidhjet e sigurta nuk mb\u00ebshteten nga serveri, duhet t\u00eb kthehet kodi i gabimit 504. Klient\u00ebt FTPS mund t\u00eb marrin informacion mbi protokollet e mbrojtjes t\u00eb mb\u00ebshtetur nga serveri p\u00ebrmes komand\u00ebs FEAT, ndon\u00ebse serveri nuk \u00ebsht\u00eb i detyruar t\u00eb zbulon se cilat nivele sigurie mb\u00ebshtet. Komandat m\u00eb t\u00eb p\u00ebrhapura FTPS jan\u00eb AUTH TLS dhe AUTH SSL, t\u00eb cilat ofrojn\u00eb mbrojtje p\u00ebrkat\u00ebse n\u00eb TLS dhe SSL.<\/li>\n<\/ul>\n<p><\/p>\n<h2>SFTP<\/h2>\n<p><\/p>\n<p>SFTP (Protocoli i Transferimit t\u00eb Dosjeve t\u00eb Sigurt) \u2013 nj\u00eb protokoll i nivelit aplikativ p\u00ebr transferimin e skedar\u00ebve, q\u00eb punon mbi nj\u00eb kanal t\u00eb sigurt. Mos e ngat\u00ebrroni me (Simple File Transfer Protocol), i cili ka t\u00eb nj\u00ebjt\u00ebn akronim. Ndryshe nga FTPS, i cili \u00ebsht\u00eb thjesht nj\u00eb zgjerim i FTP-s\u00eb, SFTP \u00ebsht\u00eb nj\u00eb protokoll i ve\u00e7ant\u00eb dhe aspak i lidhur me t\u00eb, q\u00eb p\u00ebrdor SSH (Secure Shell \u2013 nj\u00eb shell i sigurt) si baz\u00eb.<\/p>\n<p><\/p>\n<h3>Nj\u00eb Shell i Sigurt<\/h3>\n<p><\/p>\n<p>Zhvillimi i protokollit u realizua nga nj\u00eb grup i IETF t\u00eb quajtur Secsh. Dokumentacioni i pun\u00ebs p\u00ebr protokollin e ri SFTP nuk u b\u00eb standard zyrtar, megjithat\u00eb filloi t\u00eb aplikohej aktivisht p\u00ebr zhvillimin e aplikacioneve. M\u00eb pas u l\u00ebshuan gjasht\u00eb versione t\u00eb protokollit. N\u00ebse funksionaliteti e rriti gradualisht, m\u00eb 14 gusht 2006 u mor vendimi p\u00ebr t\u00eb pezulluar pun\u00ebn mbi zhvillimin e protokollit p\u00ebr shkak t\u00eb p\u00ebrfundimit t\u00eb objektivit kryesor t\u00eb projektit (zhvillimi i SSH) dhe munges\u00ebs s\u00eb mjaftueshme t\u00eb nivelit t\u00eb ekspertiz\u00ebs p\u00ebr t\u00eb kaluar n\u00eb zhvillimin e nj\u00eb protokolli t\u00eb plot\u00eb t\u00eb sistemit t\u00eb skedar\u00ebve t\u00eb larg\u00ebt.<\/p>\n<p><\/p>\n<p>SSH \u2013 \u00ebsht\u00eb nj\u00eb protokoll rrjeti q\u00eb lejon menaxhimin e larg\u00ebt t\u00eb sistemit operativ dhe tunelimin e lidhjeve TCP (p\u00ebr shembull, p\u00ebr transferimin e skedareve). Ai ka funksionalitete t\u00eb ngjashme me protokollet Telnet dhe rlogin, por, ndryshe nga ato, enkripton t\u00eb gjith\u00eb trafikun, p\u00ebrfshir\u00eb edhe fjal\u00ebkalimet e transmetuara. SSH lejon zgjedhjen e algoritmeve t\u00eb ndryshme t\u00eb enkriptimit. Klient\u00ebt dhe server\u00ebt SSH jan\u00eb t\u00eb disponuesh\u00ebm p\u00ebr shumic\u00ebn e sistemeve operativ\u00eb rrjetore.<\/p>\n<p><\/p>\n<p>SSH lejon transmetimin n\u00eb nj\u00eb mjedis t\u00eb pasigurt t\u00eb pothuajse \u00e7do protokolli tjet\u00ebr rrjeti. K\u00ebshtu, mund t\u00eb punoni n\u00eb m\u00ebnyr\u00eb t\u00eb larg\u00ebt n\u00eb kompjuter p\u00ebrmes nj\u00eb dritareje komande dhe t\u00eb transmetoni nj\u00eb rrjedh\u00eb audio ose video (p\u00ebr shembull, nga nj\u00eb kamer\u00eb web) p\u00ebrmes nj\u00eb kanali t\u00eb enkriptuar. Gjithashtu, SSH mund t\u00eb p\u00ebrdor\u00eb kompresionin e t\u00eb dh\u00ebnave t\u00eb transmetuara p\u00ebr enkriptimin e tyre t\u00eb m\u00ebpassh\u00ebm, gj\u00eb q\u00eb \u00ebsht\u00eb e favorshme, p.sh., p\u00ebr nisjen e klient\u00ebve t\u00eb X Window System-s\u00eb nga larg.<\/p>\n<p><\/p>\n<p>Versioni i par\u00eb i protokollit, SSH-1, u zhvillua n\u00eb vitin 1995 nga hulumtuesi Tatu Yl\u00f6nen nga Universiteti Teknik i Helsinkit (Finland\u00eb). SSH-1 u shkrua p\u00ebr t\u00eb ofruar m\u00eb shum\u00eb konfidencialitet sesa protokollet rlogin, telnet dhe rsh. N\u00eb vitin 1996, u zhvillua nj\u00eb version m\u00eb i sigurt i protokollit, SSH-2, i papajtuesh\u00ebm me SSH-1. Protokolli fitoi popullaritet akoma m\u00eb t\u00eb madh, dhe deri n\u00eb vitin 2000 kishte rreth dy milion p\u00ebrdorues. Aktualisht, termi \"SSH\" zakonisht i referohet SSH-2, pasi versioni i par\u00eb i protokollit, p\u00ebr shkak t\u00eb disavantazheve t\u00eb tij t\u00eb m\u00ebdha, t\u00ebr\u00ebsohet n\u00eb p\u00ebrdorim. N\u00eb vitin 2006, protokolli u miratua nga grupi i pun\u00ebs IETF si standard interneti.<\/p>\n<p><\/p>\n<p>Ka dy implementime t\u00eb zakonshme t\u00eb SSH: nj\u00eb komerciale private dhe nj\u00eb falas t\u00eb hapur. Implementimi i hapur quhet OpenSSH. Deri n\u00eb vitin 2006, 80% e kompjuter\u00ebve n\u00eb internet p\u00ebrdornin pik\u00ebrisht OpenSSH. Implementimi privat zhvillohet nga organizata SSH Communications Security, e cila \u00ebsht\u00eb nj\u00eb filiale 100% e korporat\u00ebs Tectia; ai \u00ebsht\u00eb falas p\u00ebr p\u00ebrdorim jo-komercial. K\u00ebto implementime p\u00ebrmbajn\u00eb pothuajse t\u00eb nj\u00ebjtin grup komandash.<\/p>\n<p><\/p>\n<p>Protokolli SSH-2, ndryshe nga protokolli telnet, \u00ebsht\u00eb i q\u00ebndruesh\u00ebm ndaj sulmeve t\u00eb p\u00ebrgjimit t\u00eb trafikut (\"sniffing\"), por \u00ebsht\u00eb i cenuesh\u00ebm ndaj sulmeve t\u00eb \"njeriut n\u00eb mes\". Protokolli SSH-2 \u00ebsht\u00eb gjithashtu i rezistuesh\u00ebm ndaj sulmeve t\u00eb p\u00ebrfshirjes n\u00eb mes (angl. session hijacking), pasi nuk \u00ebsht\u00eb e mundur t\u00eb lidheni me nj\u00eb seanc\u00eb t\u00eb vendosur tashm\u00eb ose ta kapni at\u00eb.<\/p>\n<p><\/p>\n<p>P\u00ebr t\u00eb parandaluar sulmet e \"njeriut n\u00eb mes\" kur lidhen me nj\u00eb host, \u00e7el\u00ebsi i t\u00eb cilit nuk dihet ende nga klienti, programi klient tregon p\u00ebrdoruesit \"nj\u00eb gjurm\u00eb t\u00eb \u00e7el\u00ebsit\" (angl. key fingerprint). Rekomandohet q\u00eb t\u00eb kontrolloni me kujdes gjurm\u00ebn e \u00e7el\u00ebsit t\u00eb treguar nga programi klient me gjurm\u00ebn e \u00e7el\u00ebsit t\u00eb serverit, preferohet q\u00eb t\u00eb merret p\u00ebrmes kanaleve t\u00eb sigurta t\u00eb komunikimit ose me t\u00eb drejt\u00eb.<\/p>\n<p><\/p>\n<p>Mb\u00ebshtetje p\u00ebr SSH \u00ebsht\u00eb implementuar n\u00eb t\u00eb gjitha sistemet operative t\u00eb ngjashme me UNIX, dhe n\u00eb shumic\u00ebn prej tyre, si nj\u00eb prej mjeteve standarde, ekziston klienti dhe serveri ssh. Ekzistojn\u00eb shum\u00eb implementime t\u00eb klient\u00ebve SSH dhe p\u00ebr OS pa UNIX. Protokolli fitoi nj\u00eb popullaritet t\u00eb madh pas zhvillimit t\u00eb gjer\u00eb t\u00eb analizator\u00ebve t\u00eb trafikut dhe m\u00ebnyrave p\u00ebr t\u00eb shkelur funksionimin e rrjeteve lokale, si nj\u00eb zgjidhje alternative p\u00ebr protokollet e pasigurta Telnet p\u00ebr menaxhimin e nyjeve t\u00eb r\u00ebnd\u00ebsishme.<\/p>\n<p><\/p>\n<h3>Lidhja me p\u00ebrdorimin e SSH<\/h3>\n<p><\/p>\n<p>P\u00ebr t\u00eb punuar me SSH nevojitet nj\u00eb server SSH dhe nj\u00eb klient SSH. Serveri d\u00ebgjon lidhjet nga makinat klient dhe, kur vendoset lidhja, kryen autentikimin, pas s\u00eb cil\u00ebs fillon sh\u00ebrbimin p\u00ebr klientin. Klienti p\u00ebrdoret p\u00ebr t\u00eb hyr\u00eb n\u00eb nj\u00eb makin\u00eb t\u00eb larg\u00ebt dhe p\u00ebr t\u00eb ekzekutuar komanda.<\/p>\n<p>\n<img decoding=\"async\" alt=\"Protokollet SFTP dhe FTPS\" src=\"\/wp-content\/uploads\/2020\/05\/2370127e0483cf579c3ae461819ada7c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h3>Krahasimi me FTPS<\/h3>\n<p><\/p>\n<p>E dyta q\u00eb dallon SFTP nga FTP dhe FTPS standard \u00ebsht\u00eb se SFTP enkripton t\u00eb gjitha komandat, emrat e p\u00ebrdoruesve, fjal\u00ebkalimet dhe t\u00eb tjera informacione konfidenciale.<\/p>\n<p><\/p>\n<p>T\u00eb dy protokollet FTPS dhe SFTP p\u00ebrdorin nj\u00eb kombinim t\u00eb algoritmeve asimetrik\u00eb (RSA, DSA), algoritmeve simetrik\u00eb (DES\/3DES, AES, Twhofish, etj.), si dhe algoritmin e shk\u00ebmbimit t\u00eb \u00e7el\u00ebsave. P\u00ebr autentikimin, FTPS (ose, p\u00ebr t\u00eb qen\u00eb m\u00eb t\u00eb sakt\u00eb, SSL\/TLS mbi protokollin FTP) p\u00ebrdor certifikatat X.509, nd\u00ebrsa SFTP (protokolli SSH) p\u00ebrdor \u00e7el\u00ebsa SSH.<\/p>\n<p><\/p>\n<p>Certifikatat X.509 p\u00ebrmbajn\u00eb nj\u00eb \u00e7el\u00ebs publik dhe disa informacione p\u00ebr certifikat\u00ebn e pronarit. K\u00ebto informacione lejojn\u00eb, nga ana tjet\u00ebr, verifikimin e integritetit t\u00eb certifikat\u00ebs vet\u00eb, autenticitetit dhe pronarit t\u00eb saj. \u00c7ertifikatat X.509 kan\u00eb nj\u00eb \u00e7el\u00ebs privat p\u00ebrkat\u00ebs, i cili zakonisht ruhet ve\u00e7mas nga certifikata p\u00ebr arsye sigurie.<\/p>\n<p><\/p>\n<p>\u00c7el\u00ebsi SSH p\u00ebrmban vet\u00ebm \u00e7el\u00ebsin publik (\u00e7el\u00ebsi privat p\u00ebrkat\u00ebs ruhet ndaras). Ai nuk p\u00ebrmban asnj\u00eb informacion rreth pronarit t\u00eb \u00e7el\u00ebsit. Disa implementime t\u00eb SSH p\u00ebrdorin certifikata X.509 p\u00ebr autentifikim, por n\u00eb t\u00eb v\u00ebrtet\u00eb ato nuk verifikojn\u00eb t\u00eb gjith\u00eb zinxhirin e certifikatave \u2014 vet\u00ebm \u00e7el\u00ebsi publik p\u00ebrdoret (\u00e7ka e b\u00ebn k\u00ebt\u00eb verifikim t\u00eb cz\u0119\u015bci t\u00eb paplot\u00eb).<\/p>\n<p><\/p>\n<h1>P\u00ebrfundimi<\/h1>\n<p><\/p>\n<p>Protokolli FTP, padyshim, luan ende nj\u00eb rol t\u00eb r\u00ebnd\u00ebsish\u00ebm n\u00eb ruajtjen dhe shp\u00ebrndarjen e informacionit n\u00eb rrjet, pavar\u00ebsisht mosh\u00ebs s\u00eb tij t\u00eb respektuar. Ai \u00ebsht\u00eb nj\u00eb protokoll i p\u00ebrshtatsh\u00ebm, multifunksional dhe standardizuar. Bazuar n\u00eb t\u00eb, jan\u00eb nd\u00ebrtuar shum\u00eb arkiva skedar\u00ebsh, pa t\u00eb cilat puna teknike do t\u00eb ishte m\u00eb pak efektive. P\u00ebr m\u00eb tep\u00ebr, ai \u00ebsht\u00eb i leht\u00eb p\u00ebr t'u konfiguruar, dhe programet server dhe klient ekzistojn\u00eb pothuajse p\u00ebr t\u00eb gjitha platformat aktuale dhe m\u00eb pak t\u00eb njohura.<\/p>\n<p><\/p>\n<p>Nga ana tjet\u00ebr, versionet e tij t\u00eb mbrojtura zgjidhin problemin e privat\u00ebsis\u00eb s\u00eb t\u00eb dh\u00ebnave t\u00eb ruajtuara dhe t\u00eb transmetuara n\u00eb bot\u00ebn moderne. T\u00eb dy protokollet e reja kan\u00eb p\u00ebrfitimet dhe disavantazhet e tyre dhe kryejn\u00eb role paksa t\u00eb ndryshme. N\u00eb ato fusha ku k\u00ebrkohet sakt\u00ebsisht arkivimi i skedar\u00ebve, preferohet p\u00ebrdorimi i FTPS, ve\u00e7an\u00ebrisht n\u00ebse m\u00eb par\u00eb ishte p\u00ebrdorur FTP klasik. SFTP \u00ebsht\u00eb m\u00eb pak i njohur p\u00ebr shkak t\u00eb papajtueshm\u00ebris\u00eb s\u00eb tij me protokollin e vjet\u00ebr, por \u00ebsht\u00eb m\u00eb i sigurt dhe ka funksionalitete m\u00eb t\u00eb m\u00ebdha, pasi b\u00ebn pjes\u00eb n\u00eb sistemin e menaxhimit t\u00eb distancuar.<\/p>\n<p><\/p>\n<h1>Lista e Burimeve<\/h1>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/topref.ru\/referat\/52883.html\">Referati \"Protokolli FTP. Informacione t\u00eb p\u00ebrgjithshme dhe ve\u00e7ori\"<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/studentlib.com\/referat-191865-protokoly_ssh_cmip_telnet.html\">Referati \"Protokollet SSH, CMIP, Telnet\"<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/works.doklad.ru\/view\/l4Ukh5_LHzk.html\">Relacioni \"SSL\/TLS\"<\/a><\/noindex><\/li>\n<\/ul>\n<p>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/500438\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0435\u0434\u0438\u0441\u043b\u043e\u0432\u0438\u0435 \u0411\u0443\u043a\u0432\u0430\u043b\u044c\u043d\u043e \u043d\u0435\u0434\u0435\u043b\u044e \u043d\u0430\u0437\u0430\u0434 \u044f \u043f\u0438\u0441\u0430\u043b \u0440\u0435\u0444\u0435\u0440\u0430\u0442 \u043f\u043e \u043e\u0431\u043e\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0439 \u0432 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0435 \u0442\u0435\u043c\u0435 \u0438 \u0441\u0442\u043e\u043b\u043a\u043d\u0443\u043b\u0441\u044f \u0441 \u0442\u0435\u043c, \u0447\u0442\u043e, \u0441\u043a\u0430\u0436\u0435\u043c \u0442\u0430\u043a, \u043f\u043e\u0437\u043d\u0430\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u0432 \u0441\u0435\u0442\u0438 \u043d\u0435 \u0442\u0430\u043a \u0443\u0436 \u043c\u043d\u043e\u0433\u043e. \u0412 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c \u0441\u0443\u0445\u0438\u0435 \u0444\u0430\u043a\u0442\u044b \u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0438 \u043f\u043e \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0435. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u044f \u0440\u0435\u0448\u0438\u043b \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043f\u043e\u0434\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0442\u0435\u043a\u0441\u0442 \u0438 \u0432\u044b\u043b\u043e\u0436\u0438\u0442\u044c \u0435\u0433\u043e \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0441\u0442\u0430\u0442\u044c\u0438. \u0427\u0442\u043e \u0442\u0430\u043a\u043e\u0435 FTP FTP (File Transfer Protocol) \u2013 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":80501,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-80500","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=\"\u041f\u0440\u0435\u0434\u0438\u0441\u043b\u043e\u0432\u0438\u0435 \u0411\u0443\u043a\u0432\u0430\u043b\u044c\u043d\u043e \u043d\u0435\u0434\u0435\u043b\u044e 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