{"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\/cs\/blog\/news\/vypusk-sistemy-sinhronizaczii-tochnogo-vremeni-chrony-4-2","title":{"rendered":"Vyd\u00e1n\u00ed syst\u00e9mu synchronizace p\u0159esn\u00e9ho \u010dasu Chrony 4.2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byl zve\u0159ejn\u011bn vyd\u00e1n\u00ed projektu Chrony 4.2, kter\u00fd poskytuje nez\u00e1vislou implementaci klienta a serveru NTP, pou\u017e\u00edvan\u00e9ho pro synchronizaci p\u0159esn\u00e9ho \u010dasu v r\u016fzn\u00fdch distribuc\u00edch Linuxu, v\u010detn\u011b Fedory, Ubuntu, SUSE\/openSUSE a RHEL\/CentOS. Program podporuje specifikaci NTPv4 (RFC 5905) a protokol NTS (Network Time Security), kter\u00fd vyu\u017e\u00edv\u00e1 prvky infrastruktury ve\u0159ejn\u00fdch kl\u00ed\u010d\u016f (PKI) a umo\u017e\u0148uje aplikaci TLS a autentizovan\u00e9ho \u0161ifrov\u00e1n\u00ed AEAD (Authenticated Encryption with Associated Data) pro kryptografickou ochranu synchronizace \u010dasu. K\u00f3d je naps\u00e1n v jazyce C a je distribuov\u00e1n pod licenc\u00ed GPLv2.    <\/p>\n<p>Pro z\u00edsk\u00e1n\u00ed dat o p\u0159esn\u00e9m \u010dase mohou b\u00fdt pou\u017eity jak extern\u00ed NTP servery, tak referen\u010dn\u00ed hodiny, nap\u0159\u00edklad na z\u00e1klad\u011b GPS p\u0159ij\u00edma\u010d\u016f, p\u0159i jejich\u017e pou\u017eit\u00ed m\u016f\u017ee b\u00fdt dosa\u017eeno p\u0159esnosti na \u00farovni zlomk\u016f mikrosekund. Projekt byl p\u016fvodn\u011b navr\u017een pro spr\u00e1vnou funkci v nestabiln\u00edch prost\u0159ed\u00edch, v\u010detn\u011b nespolehliv\u00fdch s\u00edt\u00ed s p\u0159eru\u0161en\u00fdmi spojen\u00edmi, velk\u00fdmi zpo\u017ed\u011bn\u00edmi a ztr\u00e1tami paket\u016f, a fungov\u00e1n\u00ed v <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/vps\/abuzoustojchivye-vps\/\"   title=\"virtual machines\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4260\">virtual machines<\/a> a syst\u00e9mech s m\u011bn\u00edc\u00edm se teplotn\u00edm re\u017eimem (na pr\u00e1ci hardwarov\u00fdch hodin m\u00e1 vliv teplota).    <\/p>\n<p>V nov\u00e9m vyd\u00e1n\u00ed:  <\/p>\n<ul>\n<li class=\"l\"> Byla p\u0159id\u00e1na experiment\u00e1ln\u00ed podpora pole, kter\u00e9 roz\u0161i\u0159uje mo\u017enosti protokolu NTPv4 a pou\u017e\u00edv\u00e1 se ke zv\u00fd\u0161en\u00ed stability synchronizace, stejn\u011b jako ke sn\u00ed\u017een\u00ed zpo\u017ed\u011bn\u00ed a rozptylu hodnot.\n<li class=\"l\"> Byla p\u0159id\u00e1na experiment\u00e1ln\u00ed podpora pro p\u0159enos NTP p\u0159es protokol PTP (Precision Time Protocol).\n<li class=\"l\"> Do implementace NTS byla p\u0159id\u00e1na podpora \u0161ifrovac\u00edho algoritmu AES-CMAC a mo\u017enost vyu\u017eit\u00ed hash funkc\u00ed z GnuTLS.\n<li class=\"l\"> Byl vylep\u0161en re\u017eim st\u0159\u00edd\u00e1n\u00ed <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/\"   title=\"servery\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1621\">servery<\/a> pro zv\u00fd\u0161en\u00ed spolehlivosti. Do zpr\u00e1vy serverstats byla p\u0159id\u00e1na statistika o re\u017eimu st\u0159\u00edd\u00e1n\u00ed.\n<li class=\"l\"> Byla zlep\u0161ena podpora v\u00edce klient\u016f za jedn\u00edm p\u0159eklada\u010dem adres (NAT).\n<li class=\"l\"> Byl aktualizov\u00e1n filtr syst\u00e9mov\u00fdch vol\u00e1n\u00ed na z\u00e1klad\u011b mechanismu seccomp.\n<li class=\"l\"> Podpora opera\u010dn\u00edho syst\u00e9mu Solaris byla p\u0159evedena na vyu\u017eit\u00ed jako referen\u010dn\u00ed projekt Illumos, kter\u00fd pokra\u010duje ve v\u00fdvoji j\u00e1dra, s\u00ed\u0165ov\u00e9ho z\u00e1sobn\u00edku, souborov\u00fdch syst\u00e9m\u016f, ovlada\u010d\u016f, knihoven a z\u00e1kladn\u00ed sady syst\u00e9mov\u00fdch utilit OpenSolaris. Pro Illumos bylo implementov\u00e1no vypnut\u00ed korekce j\u00e1drem syst\u00e9mov\u00fdch hodin.  <\/ul>\n<p>Zdroj: <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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synchronizace p\u0159esn\u00e9ho \u010dasu Chrony 4.2 | ProHoster","description":"Byl zve\u0159ejn\u011bn vyd\u00e1n\u00ed projektu Chrony 4.2, kter\u00fd poskytuje nez\u00e1vislou implementaci klienta a serveru NTP, pou\u017e\u00edvan\u00e9ho pro synchronizaci p\u0159esn\u00e9ho \u010dasu v r\u016fzn\u00fdch distribuc\u00edch Linuxu, v\u010detn\u011b Fedory, Ubuntu.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-sistemy-sinhronizaczii-tochnogo-vremeni-chrony-4-2","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","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 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