{"id":125518,"date":"2025-05-23T15:05:07","date_gmt":"2025-05-23T13:05:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/ubuntu-25-10-perehodit-po-umolchaniyu-na-chrony-vmesto-systemd-timesyncd"},"modified":"2025-05-23T15:05:07","modified_gmt":"2025-05-23T13:05:07","slug":"ubuntu-25-10-perehodit-po-umolchaniyu-na-chrony-vmesto-systemd-timesyncd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/ubuntu-25-10-perehodit-po-umolchaniyu-na-chrony-vmesto-systemd-timesyncd","title":{"rendered":"Az Ubuntu 25.10 alap\u00e9rtelmez\u00e9s szerint a Chrony-ra v\u00e1lt a systemd-timesyncd helyett","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Az Ubuntu Linux fejleszt\u0151i elhat\u00e1rozt\u00e1k, hogy az Ubuntu 25.10 \u00f6sszes verzi\u00f3j\u00e1ban alap\u00e9rtelmezett\u00e9 teszik a Chrony projekt haszn\u00e1lat\u00e1t a pontos id\u0151 szinkroniz\u00e1l\u00e1s\u00e1ra. Kor\u00e1bban az Ubuntu a systemd-timesyncd szolg\u00e1ltat\u00e1st haszn\u00e1lta, amelyet a NTS (Network Time Security) protokoll alkalmaz\u00e1s\u00e1nak v\u00e1gya miatt d\u00f6nt\u00f6ttek el cser\u00e9lni, hogy titkos\u00edtott m\u00f3don szinkroniz\u00e1lj\u00e1k az id\u0151t. <\/p>\n

A Chrony projekt f\u00fcggetlen NTP kliens- \u00e9s szervermegval\u00f3s\u00edt\u00e1st biztos\u00edt, amelyet m\u00e1r haszn\u00e1lnak a pontos id\u0151 szinkroniz\u00e1l\u00e1s\u00e1ra Fedora, SUSE\/openSUSE \u00e9s RHEL rendszerekben. Az NTS garant\u00e1lja, hogy a kliens a c\u00e9l NTP szerverrel l\u00e9p kapcsolatba, nem pedig egy hamis\u00edtottal. A hamis\u00edtott NTP szerver biztons\u00e1gi kock\u00e1zatot jelent, mivel a helytelen id\u0151 be\u00e1ll\u00edt\u00e1sa m\u00e1s id\u0151\u00e9rz\u00e9keny protokollok, p\u00e9ld\u00e1ul TLS \u00e9s DNSSEC biztons\u00e1g\u00e1nak megs\u00e9rt\u00e9s\u00e9re haszn\u00e1lhat\u00f3. Az id\u0151 megv\u00e1ltoztat\u00e1sa a tan\u00fas\u00edtv\u00e1nyok \u00e9rv\u00e9nyess\u00e9gi idej\u00e9nek helytelen \u00e9rtelmez\u00e9s\u00e9t okozhatja. <\/p>\n

Az NTS protokoll titkos\u00edtott kommunik\u00e1ci\u00f3s csatorna l\u00e9trehoz\u00e1s\u00e1hoz a ny\u00edlt kulcs\u00fa infrastrukt\u00fara (PKI) elemeit haszn\u00e1lja, \u00e9s lehet\u0151v\u00e9 teszi a TLS \u00e9s az AEAD (Authenticated Encryption with Associated Data) alkalmaz\u00e1s\u00e1t, hogy v\u00e9dje a felhaszn\u00e1l\u00f3kat a hamis NTP szerverekkel szembeni t\u00e1mad\u00e1sokt\u00f3l. Az NTS k\u00e9t k\u00fcl\u00f6n protokollt tartalmaz: az NTS-KE-t (NTS Key Establishment), amelyet az els\u0151dleges hiteles\u00edt\u00e9s \u00e9s a TLS feletti kulcsszerz\u00e9s lebonyol\u00edt\u00e1s\u00e1ra haszn\u00e1lnak, \u00e9s az NTS-EF-t (NTS Extension Fields), amely a pontos id\u0151 szinkroniz\u00e1l\u00e1s\u00e1nak titkos\u00edt\u00e1s\u00e1\u00e9rt \u00e9s hiteles\u00edt\u00e9s\u00e9\u00e9rt felel. Az NTS kiterjesztett mez\u0151ket ad a NTP csomagokhoz, \u00e9s az \u00f6sszes \u00e1llapotinform\u00e1ci\u00f3t csak a kliens oldal\u00e1n t\u00e1rolja cookie \u00e1tviteli mechanizmus haszn\u00e1lat\u00e1val. Az NTS protokollt haszn\u00e1l\u00f3 kapcsolatok kezel\u00e9se a 4460-as h\u00e1l\u00f3zati portot ig\u00e9nyli. <\/p>\n

A Chrony csomag m\u00e1r a main t\u00e1rol\u00f3 r\u00e9sze, \u00e9s alap\u00e9rtelmezetten haszn\u00e1lj\u00e1k n\u00e9h\u00e1ny Ubuntu felh\u0151rendszer verzi\u00f3ban. A systemd-timesyncd Chrony-ra val\u00f3 cser\u00e9je j\u00fanius 2-\u00e1n kezd\u0151dik. A Chrony alkalmaz\u00e1sa a kiad\u00e1sokban tov\u00e1bbi \"libedit2\" f\u00fcgg\u0151s\u00e9get von maga ut\u00e1n, \u00e9s a k\u00e9pf\u00e1jl m\u00e9ret\u00e9nek 803 KB-os n\u00f6veked\u00e9s\u00e9vel j\u00e1r. A systemd-timesyncd Chrony-ra t\u00f6rt\u00e9n\u0151 cser\u00e9j\u00e9hez Ubuntu 25.04 eset\u00e9n haszn\u00e1lja a k\u00f6vetkez\u0151 parancsot: \"apt-mark auto systemd-timesyncd && apt install chrony\", a systemd-timesyncd-re val\u00f3 visszat\u00e9r\u00e9shez pedig: \"apt-mark auto chrony && apt install systemd-timesyncd\".
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 Ubuntu Linux \u043d\u0430\u043c\u0435\u0442\u0438\u043b\u0438 \u043f\u0435\u0440\u0435\u0445\u043e\u0434 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Chrony \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\u043e \u0432\u0441\u0435\u0445 \u0441\u0431\u043e\u0440\u043a\u0430\u0445 Ubuntu 25.10. \u0420\u0430\u043d\u0435\u0435 \u0432 Ubuntu \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0441\u044f \u0441\u0435\u0440\u0432\u0438\u0441 systemd-timesyncd, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0440\u0435\u0448\u0435\u043d\u043e \u0437\u0430\u043c\u0435\u043d\u0438\u0442\u044c \u0438\u0437-\u0437\u0430 \u0436\u0435\u043b\u0430\u043d\u0438\u044f \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b NTS (Network Time Security) \u0434\u043b\u044f \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0437\u0430\u0449\u0438\u0442\u044b \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u0440\u0435\u043c\u0435\u043d\u0438. \u041f\u0440\u043e\u0435\u043a\u0442 Chrony \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \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, \u0443\u0436\u0435 \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 […]<\/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-125518","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\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\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Az Ubuntu 25.10 alap\u00e9rtelmez\u00e9s szerint a Chrony-ra v\u00e1lt a systemd-timesyncd helyett | ProHoster","description":"Az Ubuntu Linux fejleszt\u0151i elhat\u00e1rozt\u00e1k, hogy az Ubuntu 25.10 \u00f6sszes verzi\u00f3j\u00e1ban alap\u00e9rtelmezett\u00e9 teszik a Chrony projekt haszn\u00e1lat\u00e1t a pontos id\u0151 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