{"id":106493,"date":"2023-01-26T00:48:10","date_gmt":"2023-01-25T22:48:10","guid":{"rendered":"https:\/\/prohoster.info\/?p=106493"},"modified":"2023-01-26T10:23:05","modified_gmt":"2023-01-26T08:23:05","slug":"dostupen-openvpn-2-6-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/dostupen-openvpn-2-6-0","title":{"rendered":"Dostupn\u00fd OpenVPN 2.6.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po dvou a p\u016fl letech od vyd\u00e1n\u00ed verze 2.5 byl p\u0159ipraven release OpenVPN 2.6.0, bal\u00edku pro vytv\u00e1\u0159en\u00ed virtu\u00e1ln\u00edch priv\u00e1tn\u00edch s\u00edt\u00ed, kter\u00fd umo\u017e\u0148uje z\u0159\u00eddit \u0161ifrovan\u00e9 spojen\u00ed mezi dv\u011bma klientsk\u00fdmi stroji nebo zprovoznit centralizovan\u00fd VPN server pro sou\u010dasn\u00fd provoz n\u011bkolika klient\u016f. K\u00f3d OpenVPN je distribuov\u00e1n pod licenc\u00ed GPLv2, hotov\u00e9 bin\u00e1rn\u00ed bal\u00ed\u010dky jsou sestavov\u00e1ny pro Debian, Ubuntu, CentOS, RHEL a Windows.      <\/p>\n<p>Hlavn\u00ed novinky:  <\/p>\n<ul>\n<li class=\"l\"> Byla zaji\u0161t\u011bna podpora neomezen\u00e9ho po\u010dtu spojen\u00ed.\n<li class=\"l\"> Sou\u010d\u00e1st\u00ed je modul j\u00e1dra ovpn-dco, kter\u00fd v\u00fdrazn\u011b zrychluje v\u00fdkon. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/vpn\/\"   title=\"VPN\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"235\">VPN<\/a>. Zrychlen\u00ed se dosahuje t\u00edm, \u017ee v\u0161echny operace \u0161ifrov\u00e1n\u00ed, zpracov\u00e1n\u00ed paket\u016f a spr\u00e1vy spojen\u00ed jsou p\u0159esunuty na stranu j\u00e1dra Linuxu, co\u017e eliminuje re\u017eijn\u00ed n\u00e1klady spojen\u00e9 se zm\u011bnou kontextu, umo\u017e\u0148uje optimalizaci pr\u00e1ce skrze p\u0159\u00edm\u00fd p\u0159\u00edstup k intern\u00edmu API j\u00e1dra a vylu\u010duje pomal\u00fd p\u0159enos dat mezi j\u00e1drem a u\u017eivatelsk\u00fdm prostorem (\u0161ifrov\u00e1n\u00ed, de\u0161ifrov\u00e1n\u00ed a sm\u011brov\u00e1n\u00ed jsou prov\u00e1d\u011bny modulem bez odesl\u00e1n\u00ed provozu do zpracovatele v u\u017eivatelsk\u00e9m prostoru).\n<p>V proveden\u00fdch testech ve srovn\u00e1n\u00ed s konfigurac\u00ed zalo\u017eenou na rozhran\u00ed tun pou\u017eit\u00ed modulu na stran\u011b klienta a serveru p\u0159i pou\u017eit\u00ed \u0161ifry AES-256-GCM umo\u017enilo dos\u00e1hnout n\u00e1r\u016fstu propustnosti o 8x (ze 370 Mbit\/s na 2950 Mbit\/s). P\u0159i pou\u017eit\u00ed modulu pouze na stran\u011b klienta se propustnost zv\u00fd\u0161ila t\u0159ikr\u00e1t pro odchoz\u00ed provoz a nezm\u011bnila se pro p\u0159\u00edchoz\u00ed. P\u0159i pou\u017eit\u00ed modulu pouze na stran\u011b serveru se propustnost zv\u00fd\u0161ila 4x pro p\u0159\u00edchoz\u00ed provoz a o 35 % pro odchoz\u00ed.      <\/p>\n<li class=\"l\"> Byla poskytnuta mo\u017enost pou\u017eit\u00ed re\u017eimu TLS se sebe-podepsan\u00fdmi certifik\u00e1ty (p\u0159i pou\u017eit\u00ed volby &#171;&#8212;peer-fingerprint&#187; nen\u00ed nutn\u00e9 uv\u00e1d\u011bt parametry &#171;&#8212;ca&#187; a &#171;&#8212;capath&#187; a lze se obej\u00edt bez spu\u0161t\u011bn\u00ed PKI-serveru na z\u00e1klad\u011b Easy-RSA nebo podobn\u00e9ho softwaru).\n<li class=\"l\"> V UDP serveru byl implementov\u00e1n re\u017eim dohodov\u00e1n\u00ed spojen\u00ed na z\u00e1klad\u011b Cookie, p\u0159i kter\u00e9m se jako identifik\u00e1tor relace pou\u017e\u00edv\u00e1 Cookie zalo\u017een\u00e1 na HMAC, co\u017e umo\u017e\u0148uje serveru prov\u00e1d\u011bt verifikaci bez uchov\u00e1v\u00e1n\u00ed stavu.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora sestaven\u00ed s knihovnou OpenSSL 3.0. P\u0159id\u00e1n parametr &#171;&#8212;tls-cert-profile insecure&#187; pro v\u00fdb\u011br minim\u00e1ln\u00edho \u00farovn\u011b zabezpe\u010den\u00ed OpenSSL.\n<li class=\"l\"> Byly p\u0159id\u00e1ny nov\u00e9 \u0159\u00eddic\u00ed p\u0159\u00edkazy remote-entry-count a remote-entry-get pro po\u010d\u00edt\u00e1n\u00ed po\u010dtu extern\u00edch p\u0159ipojen\u00ed a v\u00fdpis jejich seznamu.\n<li class=\"l\"> P\u0159i souhlasu s kl\u00ed\u010di je prioritn\u011bj\u0161\u00edm zp\u016fsobem z\u00edsk\u00e1n\u00ed materi\u00e1lu pro generaci kl\u00ed\u010d\u016f te\u010f mechanismus EKM (Exported Keying Material, RFC 5705), nam\u00edsto specifick\u00e9ho mechanismu OpenVPN PRF. Pro pou\u017eit\u00ed EKM je pot\u0159eba knihovna OpenSSL nebo mbed TLS 2.18+.\n<li class=\"l\"> Byla zaji\u0161t\u011bna kompatibilita s OpenSSL v re\u017eimu FIPS, co\u017e umo\u017e\u0148uje pou\u017e\u00edvat OpenVPN na syst\u00e9mech spl\u0148uj\u00edc\u00edch bezpe\u010dnostn\u00ed po\u017eadavky FIPS 140-2.\n<li class=\"l\"> V mlock byla implementov\u00e1na kontrola rezervace dostate\u010dn\u00e9 velikosti pam\u011bti. P\u0159i dostupnosti m\u00e9n\u011b ne\u017e 100 MB RAM je pro zv\u00fd\u0161en\u00ed limitu prov\u00e1d\u011bn hovor setrlimit().\n<li class=\"l\"> Byla p\u0159id\u00e1na volba &#171;&#8212;peer-fingerprint&#187; pro ov\u011b\u0159ov\u00e1n\u00ed spr\u00e1vnosti nebo vazby certifik\u00e1tu podle otisku prstu na z\u00e1klad\u011b hash SHA256, bez pou\u017eit\u00ed tls-verify.\n<li class=\"l\"> Pro skripty byla poskytnuta mo\u017enost odlo\u017een\u00e9 (deferred) autentifikace, kter\u00e1 je realizov\u00e1na pomoc\u00ed volby &#171;&#8212;auth-user-pass-verify&#187;. Ve skriptech a pluginech byla p\u0159id\u00e1na podpora informov\u00e1n\u00ed klienta o \u010dekaj\u00edc\u00ed (pending) autentifikaci p\u0159i pou\u017eit\u00ed odlo\u017een\u00e9 autentifikace.\n<li class=\"l\"> Byl p\u0159id\u00e1n re\u017eim kompatibility (&#8212;compat-mode), kter\u00fd umo\u017e\u0148uje p\u0159ipojen\u00ed ke star\u00fdm server\u016fm, na kter\u00fdch se pou\u017e\u00edv\u00e1 OpenVPN 2.3.x nebo star\u0161\u00ed verze.\n<li class=\"l\"> V seznamu p\u0159ed\u00e1van\u00e9m prost\u0159ednictv\u00edm parametru &#171;&#8212;data-ciphers&#187; je povoleno uveden\u00ed p\u0159edpony &#171;?&#187; pro ur\u010den\u00ed voliteln\u00fdch \u0161ifrov\u00e1n\u00ed, kter\u00e1 budou vyu\u017eita pouze v p\u0159\u00edpad\u011b, \u017ee je podporov\u00e1na. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/ssl-sertifikat\/\"   title=\"SSL\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2316\">SSL<\/a>-knihovn\u011b.\n<li class=\"l\"> Byla p\u0159id\u00e1na volba &#171;&#8212;session-timeout&#187;, pomoc\u00ed kter\u00e9 lze omezit maxim\u00e1ln\u00ed dobu relace.\n<li class=\"l\"> V konfigura\u010dn\u00edm souboru je povoleno uv\u00e1d\u011bt jm\u00e9no a heslo pomoc\u00ed tagu .\n<li class=\"l\"> Byla poskytnuta mo\u017enost dynamick\u00e9ho nastaven\u00ed MTU klienta na z\u00e1klad\u011b \u00fadaj\u016f o MTU p\u0159edan\u00fdch serverem. Pro zm\u011bnu maxim\u00e1ln\u00ed velikosti MTU byla p\u0159id\u00e1na volba &#171;&#8212;tun-mtu-max&#187; (v\u00fdchoz\u00ed hodnota 1600).\n<li class=\"l\"> Byl p\u0159id\u00e1n parametr &#171;&#8212;max-packet-size&#187; pro ur\u010den\u00ed maxim\u00e1ln\u00ed velikosti \u0159\u00edd\u00edc\u00edch paket\u016f.\n<li class=\"l\"> Byla odstran\u011bna podpora re\u017eimu spu\u0161t\u011bn\u00ed OpenVPN p\u0159es inetd. Byla odstran\u011bna volba ncp-disable. Byly ozna\u010deny jako zastaral\u00e9 volba verify-hash a re\u017eim statick\u00fdch kl\u00ed\u010d\u016f (z\u016fst\u00e1v\u00e1 pouze TLS). Do kategorie zastaral\u00e9 byly p\u0159evedeny protokoly TLS 1.0 a 1.1 (parametr tls-version-min je v\u00fdchoz\u00ed hodnotou nastaven k 1.2). Byla odstran\u011bna vestav\u011bn\u00e1 implementace gener\u00e1toru pseudon\u00e1hodn\u00fdch \u010d\u00edsel (&#8212;prng), doporu\u010duje se pou\u017e\u00edvat implementaci PRNG z kryptoknihoven mbed TLS nebo OpenSSL. Byla ukon\u010dena podpora paketov\u00e9ho filtru PF (Packet Filtering). V\u00fdchoz\u00edm nastaven\u00edm je vypnuto kompresi (&#8212;allow-compression=no).\n<li class=\"l\"> Do v\u00fdchoz\u00edho seznamu \u0161ifrovac\u00edch algoritm\u016f byl p\u0159id\u00e1n CHACHA20-POLY1305.    <\/ul>\n<\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58549\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0434\u0432\u0443\u0445 \u0441 \u043f\u043e\u043b\u043e\u0432\u0438\u043d\u043e\u0439 \u043b\u0435\u0442 \u0441 \u043c\u043e\u043c\u0435\u043d\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438 \u0432\u0435\u0442\u043a\u0438 2.5 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 OpenVPN 2.6.0, \u043f\u0430\u043a\u0435\u0442\u0430 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0430\u0441\u0442\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043c\u0435\u0436\u0434\u0443 \u0434\u0432\u0443\u043c\u044f \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u043c\u0438 \u043c\u0430\u0448\u0438\u043d\u0430\u043c\u0438 \u0438\u043b\u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0443 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e VPN-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u0440\u0430\u0431\u043e\u0442\u044b \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u0432. \u041a\u043e\u0434 OpenVPN \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2, \u0433\u043e\u0442\u043e\u0432\u044b\u0435 \u0431\u0438\u043d\u0430\u0440\u043d\u044b\u0435 \u043f\u0430\u043a\u0435\u0442\u044b \u0444\u043e\u0440\u043c\u0438\u0440\u0443\u044e\u0442\u0441\u044f \u0434\u043b\u044f Debian, Ubuntu, CentOS, RHEL \u0438 Windows. [&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-106493","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=\"\u041f\u043e\u0441\u043b\u0435 \u0434\u0432\u0443\u0445 \u0441 \u043f\u043e\u043b\u043e\u0432\u0438\u043d\u043e\u0439 \u043b\u0435\u0442 \u0441 \u043c\u043e\u043c\u0435\u043d\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438 \u0432\u0435\u0442\u043a\u0438 2.5 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 OpenVPN 2.6.0, \u043f\u0430\u043a\u0435\u0442\u0430 \u0434\u043b\u044f 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