{"id":102637,"date":"2021-12-17T15:36:45","date_gmt":"2021-12-17T13:36:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-sistemy-sinhronizaczii-tochnogo-vremeni-chrony-4-2"},"modified":"2021-12-17T15:36:45","modified_gmt":"2021-12-17T13:36:45","slug":"vypusk-sistemy-sinhronizaczii-tochnogo-vremeni-chrony-4-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/vypusk-sistemy-sinhronizaczii-tochnogo-vremeni-chrony-4-2","title":{"rendered":"Versione del sistema di sincronizzazione dell'ora esatta Chrony 4.2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Pubblicata la versione del progetto Chrony 4.2, che fornisce un'implementazione indipendente del client e del server NTP, utilizzata per la sincronizzazione dell'ora esatta in diverse distribuzioni Linux, tra cui Fedora, Ubuntu, SUSE\/openSUSE e RHEL\/CentOS. Il programma supporta la specifica NTPv4 (RFC 5905) e il protocollo NTS (Network Time Security), che utilizza elementi dell'infrastruttura a chiave pubblica (PKI) e consente l'uso di TLS e crittografia autenticata AEAD (Authenticated Encryption with Associated Data) per la protezione crittografica della sincronizzazione dell'ora. Il codice \u00e8 scritto in C e distribuito sotto licenza GPLv2.    <\/p>\n<p>Per ottenere dati sull'ora esatta possono essere utilizzati sia server NTP esterni che orologi di riferimento, ad esempio basati su ricevitori GPS, con l'uso dei quali \u00e8 possibile raggiungere una precisione nell'ordine di frazioni di microsecondo. Il progetto \u00e8 stato originariamente progettato per funzionare correttamente in ambienti instabili, comprese reti inaffidabili con interruzioni, grandi ritardi e perdita di pacchetti, per operare in <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/vps\/abuzoustojchivye-vps\/\"   title=\"macchine virtuali\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4260\">macchine virtuali<\/a> e sistemi con temperature variabili (la temperatura influisce sul funzionamento degli orologi hardware).    <\/p>\n<p>Nel nuovo rilascio:  <\/p>\n<ul>\n<li class=\"l\"> Aggiunto supporto sperimentale per un campo che espande le funzionalit\u00e0 del protocollo NTPv4 e utilizzato per migliorare la stabilit\u00e0 della sincronizzazione, oltre a ridurre latenza e dispersione dei valori.\n<li class=\"l\"> Aggiunto supporto esperimentale per il passaggio di NTP sopra il protocollo PTP (Precision Time Protocol).\n<li class=\"l\"> Nell'implementazione di NTS \u00e8 stato aggiunto il supporto per l'algoritmo di crittografia AES-CMAC e la possibilit\u00e0 di utilizzare funzioni hash da GnuTLS.\n<li class=\"l\"> Migliorato il funzionamento della modalit\u00e0 di alternanza <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1621\">server<\/a> per aumentare l'affidabilit\u00e0. Nel report serverstats \u00e8 stata aggiunta la statistica relativa alla modalit\u00e0 di alternanza.\n<li class=\"l\"> Migliorato il supporto per pi\u00f9 client dietro un traduttore di indirizzi (NAT).\n<li class=\"l\"> Aggiornato il filtro delle chiamate di sistema basato sul meccanismo seccomp.\n<li class=\"l\"> Il supporto per il sistema operativo Solaris \u00e8 stato spostato a utilizzare come riferimento il progetto Illumos, che continua lo sviluppo del kernel, dello stack di rete, dei file system, dei driver, delle librerie e del set di utilit\u00e0 di base di OpenSolaris. Per Illumos \u00e8 stata implementata la disattivazione della correzione della temperatura degli orologi di sistema da parte del kernel.  <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56363\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Chrony 4.2, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043d\u0435\u0437\u0430\u0432\u0438\u0441\u0438\u043c\u0443\u044e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 NTP, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u0443\u044e \u0434\u043b\u044f \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0442\u043e\u0447\u043d\u043e\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0432 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 Linux, \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u0432 Fedora, Ubuntu, SUSE\/openSUSE \u0438 RHEL\/CentOS. \u041f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e NTPv4 (RFC 5905) \u0438 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b NTS (Network Time Security), \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0439 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u044b \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0445 \u043a\u043b\u044e\u0447\u0435\u0439 (PKI) \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c TLS \u0438 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-102637","post","type-post","status-publish","format-standard","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=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a 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