{"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\/ro\/blog\/news\/vypusk-ntp-serverov-ntpsec-1-2-0-i-shrony-4-0-s-podderzhkoj-zashhishhyonnogo-protokola-nts","title":{"rendered":"Lansarea serverelor NTP NTPsec 1.2.0 \u0219i Chrony 4.0 cu suport pentru protocolul securizat NTS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Comitetul IETF (Internet Engineering Task Force), care se ocup\u0103 cu dezvoltarea protocoalelor \u0219i arhitecturii internetului, a finalizat<\/a><\/noindex> formarea RFC pentru protocolul NTS (Network Time Security) \u0219i a publicat specifica\u021bia asociat\u0103 cu identificatorul RFC 8915<\/a><\/noindex>. RFC a primit statutul \u201eStandard Propus\u201d, dup\u0103 care va \u00eencepe lucrul pentru a conferi RFC-ului statutul de standard preliminar (Draft Standard), ceea ce \u00eenseamn\u0103, de fapt, stabilizarea complet\u0103 a protocolului \u0219i luarea \u00een considerare a tuturor observa\u021biilor formulate. <\/p>\n

Standardizarea NTS este un pas important pentru sporirea securit\u0103\u021bii serviciilor de sincronizare a timpului precis \u0219i protejarea utilizatorilor \u00eempotriva atacurilor care imit\u0103 serverul NTP cu care se conecteaz\u0103 clientul. Manipul\u0103rile atacatorilor legate de stabilirea unei ore gre\u0219ite pot fi utilizate pentru a compromite securitatea altor protocoale care iau \u00een considerare timpul, cum ar fi TLS. De exemplu, modificarea orei poate duce la interpretarea gre\u0219it\u0103 a datelor privind ac\u021biunea certificatelor TLS. P\u00e2n\u0103 acum, NTP \u0219i criptarea simetric\u0103 a canalelor de comunicare nu au permis garantarea faptului c\u0103 clientul interac\u021bioneaz\u0103 cu serverul NTP \u021bint\u0103 \u0219i nu cu un server NTP falsificat, iar autentificarea pe baza cheilor nu a fost r\u0103sp\u00e2ndit\u0103 deoarece este mult prea complicat\u0103 pentru configurare.<\/p>\n

NTS utilizeaz\u0103 elemente ale infrastructurii de chei publice (PKI) \u0219i permite utilizarea TLS \u0219i cript\u0103rii autentificate AEAD (Authenticated Encryption with Associated Data) pentru protec\u021bia criptografic\u0103 a interac\u021biunii \u00eentre client \u0219i server prin intermediul protocolului NTP (Network Time Protocol). NTS include dou\u0103 protocoale separate: NTS-KE (NTS Key Establishment pentru gestionarea autentific\u0103rii ini\u021biale \u0219i negocierea cheilor deasupra TLS) \u0219i NTS-EF (NTS Extension Fields, responsabil pentru criptarea \u0219i autentificarea sesiunii de sincronizare a timpului). NTS adaug\u0103 c\u00e2teva c\u00e2mpuri extinse \u00een pachetele NTP \u0219i stocheaz\u0103 toate informa\u021biile despre stare doar pe partea clientului, folosind un mecanism de transmitere a cookie-urilor. Un port de re\u021bea 4460 a fost rezervat pentru gestionarea conexiunilor prin protocolul NTS.<\/p>\n

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

Primele implement\u0103ri standardizate NTS au fost propuse \u00een versiunile recent publicate NTPsec 1.2.0<\/a><\/noindex> \u0219i Chrony 4.0<\/a><\/noindex>. Chrony<\/a><\/noindex> reprezint\u0103 o implementare independent\u0103 a clientului \u0219i serverului NTP, care este utilizat\u0103 pentru sincronizarea timpului exact \u00een diverse distribu\u021bii Linux, inclusiv Fedora, Ubuntu, SUSE\/openSUSE \u0219i RHEL\/CentOS. NTPsec<\/a><\/noindex> se dezvolt\u0103<\/a><\/noindex> sub conducerea lui Eric Raymond \u0219i este un fork al implement\u0103rii de referin\u021b\u0103 a protocolului NTPv4 (NTP Classic 4.3.34), concentr\u00e2ndu-se pe rescrierea bazei de cod pentru a \u00eembun\u0103t\u0103\u021bi securitatea (a fost efectuat\u0103 cur\u0103\u021barea codului \u00eenvechit, au fost utilizate metode de prevenire a atacurilor \u0219i func\u021bii sigure pentru gestionarea memoriei \u0219i a \u0219irurilor).<\/p>\n

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

Sursa: opennet.ro<\/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-news"],"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\udd47Lansarea serverelor NTP NTPsec 1.2.0 \u0219i Chrony 4.0 cu suport pentru protocolul securizat NTS | ProHoster","description":"Comitetul IETF (Internet Engineering Task Force), care se ocup\u0103 cu dezvoltarea protocoalelor \u0219i arhitecturii internetului, a 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