{"id":54351,"date":"2019-12-24T00:00:00","date_gmt":"2019-12-23T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/istoriya-sistemy-domennyh-imen-pervye-dns-servery"},"modified":"2020-02-18T14:02:21","modified_gmt":"2020-02-18T11:02:21","slug":"istoriya-sistemy-domennyh-imen-pervye-dns-servery","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/istoriya-sistemy-domennyh-imen-pervye-dns-servery","title":{"rendered":"Storia del sistema dei nomi di dominio: i primi server DNS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>L'ultima volta abbiamo <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/1cloud\/blog\/479452\/\">iniziato a raccontare la storia del DNS<\/a><\/noindex> \u2014 abbiamo ricordato da dove ha avuto inizio il progetto e quali problemi era stato creato per risolvere nella rete ARPANET. Oggi parleremo del primo server DNS BIND.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/1cloud\/blog\/480514\/\"><img decoding=\"async\" alt=\"Storia del sistema dei nomi di dominio: i primi server DNS\" src=\"\/wp-content\/uploads\/2019\/12\/c1e95bf16c7a3b9481ca75d102ac3edc.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<i>Foto \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.flickr.com\/photos\/nhoj\/8856003234\">John Markos O&#8217;Neill<\/a><\/noindex> \u2014 CC BY-SA<\/i><\/p>\n<h2>I primi server DNS<\/h2>\n<p>\nDopo che nel 1983 Paul Mockapetris e Jon Postel\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc882\">proposero il concetto<\/a><\/noindex>\u00a0di nomi di dominio per la rete ARPANET, esso ottenne abbastanza rapidamente l'approvazione della comunit\u00e0 IT. Tra i primi a implementarlo nella pratica ci furono ingegneri dell'Universit\u00e0 di Berkeley. Nel 1984 quattro studenti presentarono il primo server DNS \u2014 Berkeley Internet Name Domain (BIND). Lavorarono nell'ambito di una sovvenzione fornita dalla DARPA (Defense Advanced Research Projects Agency) degli Stati Uniti.<\/p>\n<p>Il sistema sviluppato dagli studenti universitari convertiva automaticamente nome DNS in indirizzo IP e viceversa. \u00c8 interessante notare che quando il suo codice fu caricato su <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/BSD\">BSD<\/a><\/noindex> (sistema di distribuzione software), le prime sorgenti avevano gi\u00e0 il numero di versione 4.3. All'inizio, il server DNS era utilizzato dal personale dei laboratori universitari. Fino alla versione 4.8.3, lo sviluppo di BIND era gestito dai membri del gruppo di ricerca dell'Universit\u00e0 di Berkeley \u2014 Computer Systems Research Group (CSRG), ma nella seconda met\u00e0 degli anni '80 il server DNS \u00e8 uscito dall'universit\u00e0 \u2014 \u00e8 stato trasferito a Paul Vixie della compagnia\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Digital_Equipment_Corporation\">DEC<\/a><\/noindex>. Paul ha rilasciato gli aggiornamenti 4.9 e 4.9.1, poi ha fondato l'Internet Software Consortium (ISC), che da allora si occupa del supporto di BIND. Secondo Paul, tutte le versioni precedenti si basavano sul codice degli studenti di Berkeley, e negli ultimi quindici anni ha completamente esaurito le sue possibilit\u00e0 di aggiornamento. Pertanto, nel 2000 BIND \u00e8 stato riscritto da zero.<\/p>\n<blockquote><p>Il server BIND include diverse librerie e componenti che implementano un'architettura \"client-server\" per DNS e si occupano della configurazione delle funzioni del server DNS. BIND \u00e8 ampiamente diffuso, specialmente su Linux, e rimane una implementazione popolare del server DNS. Questo <noindex><a rel=\"nofollow\" href=\"https:\/\/www.isc.org\/download\/\">soluzione<\/a><\/noindex> \u00e8 installato sui server che forniscono supporto per la <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%9A%D0%BE%D1%80%D0%BD%D0%B5%D0%B2%D1%8B%D0%B5_%D1%81%D0%B5%D1%80%D0%B2%D0%B5%D1%80%D1%8B_DNS\">zona radice<\/a><\/noindex>.<\/p><\/blockquote>\n<p>\nEsistono alternative a BIND. Ad esempio, PowerDNS, incluso nei pacchetti delle distribuzioni Linux. \u00c8 stato scritto da Bert Hubert della societ\u00e0 olandese PowerDNS.COM ed \u00e8 supportato dalla comunit\u00e0 open source. Nel 2005, PowerDNS \u00e8 stato implementato sui server della Fondazione Wikimedia. Questa soluzione \u00e8 utilizzata anche da grandi fornitori di servizi cloud, compagnie di telecomunicazioni europee e organizzazioni della lista Fortune 500.<\/p>\n<p>BIND e PowerDNS sono tra i server DNS pi\u00f9 diffusi, ma non sono gli unici. Vale la pena notare anche\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/NLnetLabs\/unbound\">Unbound<\/a><\/noindex>,\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Djbdns\">djbdns<\/a><\/noindex> e\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Dnsmasq\">Dnsmasq<\/a><\/noindex>.<\/p>\n<h2>Sviluppo del sistema dei nomi di dominio<\/h2>\n<p>\nNel corso della storia del DNS, sono state apportate numerose modifiche alla sua specifica. Uno dei primi e pi\u00f9 significativi aggiornamenti \u00e8 stato\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc1996\">\u00e8 stato aggiunto<\/a><\/noindex>\u00a0i meccanismi NOTIFY e IXFR nel 1996. Questi hanno semplificato la replicazione dei database del sistema dei nomi di dominio tra i server primari e secondari. La nuova soluzione ha permesso di configurare le notifiche sulle modifiche delle registrazioni DNS. Questo approccio garantiva l'identit\u00e0 tra la zona DNS secondaria e quella primaria, oltre a risparmiare traffico: la sincronizzazione avveniva solo quando necessario, anzich\u00e9 a intervalli fissi.<\/p>\n<p><img decoding=\"async\" alt=\"Storia del sistema dei nomi di dominio: i primi server DNS\" src=\"\/wp-content\/uploads\/2019\/12\/f9c27f2dfe738274503bdd95ca32bce5.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Foto \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.flickr.com\/photos\/bike\/266453254\">Richard Masoner<\/a><\/noindex> \u2014 CC BY-SA<\/i><\/p>\n<p>Inizialmente, la rete DNS non era accessibile al grande pubblico e i potenziali problemi di sicurezza informatica non erano una priorit\u00e0 durante lo sviluppo del sistema, ma questo approccio ha avuto ripercussioni nel tempo. Con l'evoluzione di Internet, le vulnerabilit\u00e0 del sistema hanno cominciato ad essere sfruttate: ad esempio, sono emersi attacchi come il DNS spoofing. In questo caso, la cache dei server DNS viene riempita con dati privi di una fonte autorevole e le richieste vengono reindirizzate a server maligni.<\/p>\n<p>Per risolvere il problema, nel DNS\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/www.icann.org\/resources\/pages\/dnssec-what-is-it-why-important-2019-03-05-en\">\u00e8 stato implementato<\/a><\/noindex>\u00a0le firme crittografiche per le risposte DNS (DNSSEC) sono un meccanismo che consente di costruire una catena di fiducia per il dominio a partire dalla zona radice. Vale la pena notare che un meccanismo simile \u00e8 stato aggiunto per l'autenticazione degli host durante il trasferimento della zona DNS \u2014 \u00e8 stato chiamato TSIG.<\/p>\n<p>Modifiche che semplificano la replica delle basi DNS e risolvono problemi di sicurezza sono state accolte con favore dalla comunit\u00e0 IT. Ma ci sono state anche modifiche che la comunit\u00e0 non ha accolto positivamente. In particolare, il passaggio dai nomi di dominio gratuiti a quelli a pagamento. Questo \u00e8 solo un esempio di una delle \"guerre\" nella storia del DNS. Ne parleremo pi\u00f9 nel dettaglio nel prossimo articolo.<\/p>\n<p><img decoding=\"async\" alt=\"Storia del sistema dei nomi di dominio: i primi server DNS\" src=\"\/wp-content\/uploads\/2019\/12\/1f42acb7d2b0e01063a51c01ecc08be6.jpg\" style=\"display:block;margin: 0 auto;\" \/>Noi di 1cloud offriamo il servizio \"<noindex><a rel=\"nofollow\" href=\"https:\/\/1cloud.ru\/services\/vps-vds?utm_source=habrahabr&amp;utm_medium=cpm&amp;utm_campaign=dns2&amp;utm_content=site\">Server virtuale<\/a><\/noindex>\u00bb. Con questo strumento puoi affittare e configurare un server VDS\/VPS remoto in pochi minuti.<br \/>\n<img decoding=\"async\" alt=\"Storia del sistema dei nomi di dominio: i primi server DNS\" src=\"\/wp-content\/uploads\/2019\/12\/83e0fdbcbe67addee00c0938949e6f7e.jpg\" style=\"display:block;margin: 0 auto;\" \/>C'\u00e8 anche una <noindex><a rel=\"nofollow\" href=\"https:\/\/1cloud.ru\/conditions\/referral?utm_source=habrahabr&amp;utm_medium=cpm&amp;utm_campaign=dns2&amp;utm_content=site\">programma di affiliazione<\/a><\/noindex> per tutti gli utenti. Pubblica i link di riferimento al nostro servizio e ricevi una ricompensa per i clienti portati.<\/p>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/1cloud\/blog\/480514\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u0440\u043e\u0448\u043b\u044b\u0439 \u0440\u0430\u0437 \u043c\u044b \u043d\u0430\u0447\u0430\u043b\u0438 \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u0438\u0441\u0442\u043e\u0440\u0438\u044e DNS \u2014 \u0432\u0441\u043f\u043e\u043c\u043d\u0438\u043b\u0438, \u0441 \u0447\u0435\u0433\u043e \u0441\u0442\u0430\u0440\u0442\u043e\u0432\u0430\u043b \u043f\u0440\u043e\u0435\u043a\u0442, \u0438 \u043a\u0430\u043a\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0431\u044b\u043b \u043f\u0440\u0438\u0437\u0432\u0430\u043d \u0440\u0435\u0448\u0438\u0442\u044c \u0432 \u0441\u0435\u0442\u0438 ARPANET. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u043f\u043e\u0433\u043e\u0432\u043e\u0440\u0438\u043c \u043e \u043f\u0435\u0440\u0432\u043e\u043c DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0435 BIND. \u0424\u043e\u0442\u043e \u2014 John Markos O&#8217;Neill \u2014 CC BY-SA \u041f\u0435\u0440\u0432\u044b\u0435 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u044b \u041f\u043e\u0441\u043b\u0435 \u0442\u043e\u0433\u043e \u043a\u0430\u043a \u0432 1983 \u0433\u043e\u0434\u0443 \u041f\u043e\u043b \u041c\u043e\u043a\u0430\u043f\u0435\u0442\u0440\u0438\u0441 (Paul Mockapetris) \u0438 \u0414\u0436\u043e\u043d \u041f\u043e\u0441\u0442\u0435\u043b (Jon Postel)\u00a0\u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b\u0438 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u044e\u00a0\u0434\u043e\u043c\u0435\u043d\u043d\u044b\u0445 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Oggi parleremo del primo server DNS BIND. Foto \u2014 John Markos O'Neill \u2014 CC BY-SA I primi server DNS Dopo che nel 1983 Paul Mockapetris e Jon Postel proposero il concetto di nomi di dominio.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/istoriya-sistemy-domennyh-imen-pervye-dns-servery","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0418\u0441\u0442\u043e\u0440\u0438\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0434\u043e\u043c\u0435\u043d\u043d\u044b\u0445 \u0438\u043c\u0435\u043d: \u043f\u0435\u0440\u0432\u044b\u0435 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