{"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\/da\/blog\/news\/vypusk-sistemy-sinhronizaczii-tochnogo-vremeni-chrony-4-2","title":{"rendered":"Udgivelsen af tidssynkroniseringssystemet Chrony 4.2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Udgivelsen af projektet Chrony 4.2, som leverer en uafh\u00e6ngig implementering af NTP-klient og server, der anvendes til pr\u00e6cisionssynkronisering af tid i forskellige Linux-distributioner, herunder Fedora, Ubuntu, SUSE\/openSUSE og RHEL\/CentOS. Programmet underst\u00f8tter NTPv4-specifikationen (RFC 5905) og protokollen NTS (Network Time Security), som bruger elementer fra en offentlig n\u00f8gleinfrastruktur (PKI) og muligg\u00f8r brug af TLS og autentificeret kryptering AEAD (Authenticated Encryption with Associated Data) til kryptografisk beskyttelse af tidssynkronisering. Koden er skrevet i C og distribueres under GPLv2-licensen.    <\/p>\n<p>Data om pr\u00e6cis tid kan hentes fra b\u00e5de eksterne NTP-servere og referenceur, for eksempel baseret p\u00e5 GPS-modtagere, hvor der kan opn\u00e5s n\u00f8jagtighed p\u00e5 mikroskunder. Projektet er oprindeligt designet til at fungere korrekt i ustabile milj\u00f8er, herunder up\u00e5lidelige netv\u00e6rk med forbindelsesbrud, store forsinkelser og pakktab, samt drift i <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/vps\/abuzoustojchivye-vps\/\"   title=\"virtuelle maskiner\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4260\">virtuelle maskiner<\/a> systemer med skiftende temperaturforhold (temperatur p\u00e5virker hardwarens ur).    <\/p>\n<p>I den nye version:  <\/p>\n<ul>\n<li class=\"l\"> Der er tilf\u00f8jet eksperimentel underst\u00f8ttelse af et felt, der udvider NTPv4-protokollens muligheder og bruges til at forbedre stabiliteten af synkronisering samt reducere forsinkelser og variabilitet i v\u00e6rdier.\n<li class=\"l\"> Der er tilf\u00f8jet eksperimentel underst\u00f8ttelse af NTP, der g\u00e5r over PTP (Precision Time Protocol).\n<li class=\"l\"> Implementeringen af NTS har f\u00e5et tilf\u00f8jet underst\u00f8ttelse af AES-CMAC krypteringsalgoritmen og muligheden for at bruge hash-funktioner fra GnuTLS.\n<li class=\"l\"> Ydeevnen i skiftetilstand er forbedret <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/\"   title=\"servere\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1621\">servere<\/a> for at \u00f8ge p\u00e5lideligheden. Rapporten serverstats har f\u00e5et tilf\u00f8jet statistik om skiftetilstand.\n<li class=\"l\"> Underst\u00f8ttelsen af flere klienter bag en NAT (Network Address Translation) er forbedret.\n<li class=\"l\"> Systemopkaldsfilteret er opdateret baseret p\u00e5 seccomp-mekanismen.\n<li class=\"l\"> Underst\u00f8ttelsen af Solaris OS er blevet overf\u00f8rt til at bruge Illumos-projektet som reference, som forts\u00e6tter udviklingen af kernen, netv\u00e6rkssystemet, filsystemerne, driverne, bibliotekerne og det grundl\u00e6ggende s\u00e6t systemv\u00e6rkt\u00f8jer fra OpenSolaris. For Illumos er der implementeret en mulighed for at deaktivere justeringen af systemuret af kernen.  <\/ul>\n<p>Kilde: <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 5.0.3 - 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 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Chrony 4.2, 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