{"id":96270,"date":"2020-10-10T01:42:13","date_gmt":"2020-10-09T23:42:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-ntp-serverov-ntpsec-1-2-0-i-shrony-4-0-s-podderzhkoj-zashhishhyonnogo-protokola-nts"},"modified":"2020-10-10T01:42:13","modified_gmt":"2020-10-09T23:42:13","slug":"vypusk-ntp-serverov-ntpsec-1-2-0-i-shrony-4-0-s-podderzhkoj-zashhishhyonnogo-protokola-nts","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/vypusk-ntp-serverov-ntpsec-1-2-0-i-shrony-4-0-s-podderzhkoj-zashhishhyonnogo-protokola-nts","title":{"rendered":"Rilascio dei server NTP NTPsec 1.2.0 e \u0421hrony 4.0 con supporto per il protocollo sicuro NTS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Il Comitato IETF (Internet Engineering Task Force), che si occupa dello sviluppo dei protocolli e dell'architettura di Internet, <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.cloudflare.com\/nts-is-now-rfc\/\">completato<\/a><\/noindex> formazione di RFC per il protocollo NTS (Network Time Security) e pubblicato la relativa specifica con l'identificativo <noindex><a rel=\"nofollow\" href=\"https:\/\/www.rfc-editor.org\/info\/rfc8915\">RFC 8915<\/a><\/noindex>. L'RFC ha ottenuto lo status di \u00abStandard Proposto\u00bb, dopodich\u00e9 inizier\u00e0 il lavoro per conferire all'RFC lo status di standard bozza (Draft Standard), che significa di fatto la completa stabilizzazione del protocollo e la considerazione di tutti i commenti espressi. <\/p>\n<p>La standardizzazione di NTS \u00e8 un passo importante per aumentare la sicurezza dei servizi di sincronizzazione del tempo esatto e proteggere gli utenti da attacchi che imitano un server NTP a cui si connette il cliente. Le manipolazioni degli hacker, legate all'impostazione di orari errati, possono essere utilizzate per compromettere la sicurezza di altri protocolli che tengono conto del tempo, come TLS. Ad esempio, una modifica dell'orario pu\u00f2 portare a una corretta interpretazione dei dati sulle azioni dei certificati TLS. Fino ad ora, NTP e la crittografia simmetrica dei canali di comunicazione non hanno garantito che il cliente interagisse con il server NTP di destinazione e non con uno sostituito, mentre l'autenticazione tramite chiavi non si \u00e8 diffusa poich\u00e9 troppo complicata da configurare.<\/p>\n<p>NTS utilizza elementi di infrastruttura a chiave pubblica (PKI) e consente di utilizzare TLS e crittografia autenticata AEAD (Authenticated Encryption with Associated Data) per la protezione crittografica dell'interazione tra cliente e server attraverso il protocollo NTP (Network Time Protocol). NTS comprende due protocolli distinti: NTS-KE (NTS Key Establishment per gestire l'autenticazione iniziale e la n\u00e9gociation delle chiavi sopra TLS) e NTS-EF (NTS Extension Fields, responsabile della crittografia e dell'autenticazione della sessione di sincronizzazione temporale). NTS aggiunge ai pacchetti NTP diversi campi estesi e conserva tutte le informazioni sullo stato solo lato cliente, utilizzando un meccanismo di trasferimento cookie. Per gestire le connessioni attraverso il protocollo NTS \u00e8 riservata la porta di rete 4460.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/blog-cloudflare-com-assets.storage.googleapis.com\/2020\/10\/pasted-image-0.png\"><img decoding=\"async\" alt=\"Rilascio dei server NTP NTPsec 1.2.0 e \u0421hrony 4.0 con supporto per il protocollo sicuro NTS\" src=\"\/wp-content\/uploads\/2020\/10\/f97d82315d5964dc0cbbc22d95586ec3.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Le prime implementazioni standardizzate di NTS sono state proposte nei recenti rilasci pubblicati <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.ntpsec.org\/2020\/10\/06\/version-1.2.0.html\">NTPsec 1.2.0<\/a><\/noindex> e <noindex><a rel=\"nofollow\" href=\"https:\/\/listengine.tuxfamily.org\/chrony.tuxfamily.org\/chrony-announce\/2020\/10\/msg00000.html\">\u0421hrony 4.0<\/a><\/noindex>. <noindex><a rel=\"nofollow\" href=\"https:\/\/chrony.tuxfamily.org\/\">\u0421hrony<\/a><\/noindex> fornisce un'implementazione indipendente di cliente e server NTP, utilizzata per la sincronizzazione del tempo esatto in varie distribuzioni Linux, inclusi Fedora, Ubuntu, SUSE\/openSUSE e RHEL\/CentOS. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.ntpsec.org\/\">NTPsec<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47362\">\u00e8 in fase di sviluppo<\/a><\/noindex> sotto la direzione di Eric Raymond (Eric S. Raymond) ed \u00e8 un fork dell'implementazione di riferimento del protocollo NTPv4 (NTP Classic 4.3.34), concentrato sulla revisione della base di codice per migliorare la sicurezza (\u00e8 stata eseguita una pulizia del codice obsoleto, impiegati metodi di prevenzione degli attacchi e funzioni protette per la gestione di memoria e stringhe).<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53862\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u0438\u0442\u0435\u0442 IETF (Internet Engineering Task Force), \u0437\u0430\u043d\u0438\u043c\u0430\u044e\u0449\u0438\u0439\u0441\u044f \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0435\u043c \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u043e\u0432 \u0438 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442\u0430, \u0437\u0430\u0432\u0435\u0440\u0448\u0438\u043b \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 RFC \u0434\u043b\u044f \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 NTS (Network Time Security) \u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0443\u044e \u0441 \u043d\u0438\u043c \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e \u043f\u043e\u0434 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u043c RFC 8915. RFC \u043f\u043e\u043b\u0443\u0447\u0438\u043b \u0441\u0442\u0430\u0442\u0443\u0441 &#171;\u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u043e\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430&#187;, \u043f\u043e\u0441\u043b\u0435 \u0447\u0435\u0433\u043e \u043d\u0430\u0447\u043d\u0451\u0442\u0441\u044f \u0440\u0430\u0431\u043e\u0442\u0430 \u043f\u043e \u043f\u0440\u0438\u0434\u0430\u043d\u0438\u044e RFC \u0441\u0442\u0430\u0442\u0443\u0441\u0430 \u0447\u0435\u0440\u043d\u043e\u0432\u043e\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430 (Draft Standard), \u0444\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u043e\u0437\u043d\u0430\u0447\u0430\u044e\u0449\u0435\u0433\u043e \u043f\u043e\u043b\u043d\u0443\u044e \u0441\u0442\u0430\u0431\u0438\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 \u0438 \u0443\u0447\u0451\u0442 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":96271,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-96270","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\" content=\"\u041a\u043e\u043c\u0438\u0442\u0435\u0442 IETF (Internet Engineering Task Force), \u0437\u0430\u043d\u0438\u043c\u0430\u044e\u0449\u0438\u0439\u0441\u044f \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0435\u043c \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u043e\u0432 \u0438 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442\u0430, \u0437\u0430\u0432\u0435\u0440\u0448\u0438\u043b.\" \/>\n\t<meta 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