{"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\/novosti-interneta\/vypusk-ntp-serverov-ntpsec-1-2-0-i-shrony-4-0-s-podderzhkoj-zashhishhyonnogo-protokola-nts","title":{"rendered":"Uscita dei server NTP NTPsec 1.2.0 e Chrony 4.0 con supporto per il protocollo protetto NTS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Il Comitato IETF (Internet Engineering Task Force), responsabile dello sviluppo dei protocolli e dell'architettura di Internet, ha completato<\/a><\/noindex> generazione di RFC per il protocollo NTS (Network Time Security) e pubblicazione della specifica correlata con l'identificativo RFC 8915<\/a><\/noindex>. Il RFC ha ottenuto lo status di \u00abStandard Proposto\u00bb, dopodich\u00e9 inizier\u00e0 il lavoro per conferire al RFC lo status di Standard Bozza (Draft Standard), il che significa di fatto una completa stabilizzazione del protocollo e considerazione di tutti i commenti espressi. <\/p>\n

La standardizzazione di NTS \u00e8 un passo fondamentale per migliorare la sicurezza dei servizi di sincronizzazione dell'ora esatta e proteggere gli utenti dagli attacchi che imitano un server NTP a cui si collega il client. Le manomissioni degli aggressori legate all'impostazione di un orario errato possono essere sfruttate per compromettere la sicurezza di altri protocolli che tengono conto del tempo, come TLS. Ad esempio, una modifica dell'orario potrebbe portare a un'errata interpretazione dei dati riguardanti l'operativit\u00e0 dei certificati TLS. Fino ad ora, NTP e la crittografia simmetrica delle comunicazioni non hanno garantito che il client interagisca con il server NTP previsto e non con uno sostituito, mentre l'autenticazione basata su chiavi non ha trovato ampia diffusione a causa della sua complessit\u00e0 di configurazione.<\/p>\n

NTS utilizza elementi dell'infrastruttura a chiave pubblica (PKI) e consente l'uso di TLS e di crittografia autenticata AEAD (Authenticated Encryption with Associated Data) per la protezione crittografica delle interazioni tra client e server tramite il protocollo NTP (Network Time Protocol). NTS comprende due protocolli distinti: NTS-KE (NTS Key Establishment per la gestione dell'autenticazione iniziale e dell'accordo 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 memorizza tutte le informazioni sullo stato solo dal lato del client, utilizzando un meccanismo di trasmissione dei cookie. Per gestire le connessioni tramite il protocollo NTS, \u00e8 riservata la porta di rete 4460.<\/p>\n

\"Uscita<\/a><\/noindex><\/center><\/p>\n

Le prime implementazioni dello standard NTS sono state proposte nelle recenti versioni pubblicate NTPsec 1.2.0<\/a><\/noindex> e Chrony 4.0<\/a><\/noindex>. Chrony<\/a><\/noindex> fornisce un'implementazione autonoma del client e del server NTP, utilizzata per la sincronizzazione del tempo preciso in varie distribuzioni Linux, tra cui Fedora, Ubuntu, SUSE\/openSUSE e RHEL\/CentOS. NTPsec<\/a><\/noindex> si sviluppa<\/a><\/noindex> sotto la guida di Eric S. Raymond ed \u00e8 un fork dell'implementazione di riferimento del protocollo NTPv4 (NTP Classic 4.3.34), focalizzato sulla revisione della base di codice per migliorare la sicurezza (\u00e8 stata eseguita una pulizia del codice obsoleto, sono stati implementati metodi di prevenzione degli attacchi e funzioni sicure per gestire la memoria e le stringhe).<\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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 «\u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u043e\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430», \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 […]<\/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-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Uscita dei server NTP NTPsec 1.2.0 e Chrony 4.0 con supporto per il protocollo sicuro NTS | ProHoster","description":"Il Comitato IETF (Internet Engineering Task Force), che si occupa dello sviluppo dei protocolli e dell'architettura di Internet, ha completato la stesura del RFC per il protocollo NTS (Network Time Security) e ha pubblicato la relativa specifica con l'identificativo RFC 8915. Il RFC ha ottenuto lo status di \"Standard Proposto\", dopo di che inizier\u00e0 il processo per conferire al RFC lo status di Standard Bozza (Draft Standard), il che significa sostanzialmente la completa stabilizzazione del protocollo e la considerazione.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/vypusk-ntp-serverov-ntpsec-1-2-0-i-shrony-4-0-s-podderzhkoj-zashhishhyonnogo-protokola-nts","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\u0412\u044b\u043f\u0443\u0441\u043a NTP-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 NTPsec 1.2.0 \u0438 \u0421hrony 4.0 \u0441 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 NTS | ProHoster","og:description":"\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. 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