{"id":101359,"date":"2021-09-21T22:22:43","date_gmt":"2021-09-21T20:22:43","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predstavlen-modul-yadra-sposobnyj-v-razy-uskorit-openvpn"},"modified":"2021-09-21T22:22:43","modified_gmt":"2021-09-21T20:22:43","slug":"predstavlen-modul-yadra-sposobnyj-v-razy-uskorit-openvpn","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/predstavlen-modul-yadra-sposobnyj-v-razy-uskorit-openvpn","title":{"rendered":"Un module noyau a \u00e9t\u00e9 pr\u00e9sent\u00e9, capable d'acc\u00e9l\u00e9rer consid\u00e9rablement OpenVPN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Les d\u00e9veloppeurs du package de cr\u00e9ation de r\u00e9seaux priv\u00e9s virtuels OpenVPN ont pr\u00e9sent\u00e9 le module noyau ovpn-dco, qui permet d'am\u00e9liorer consid\u00e9rablement les performances VPN. Bien que le module soit encore en d\u00e9veloppement en se basant uniquement sur la branche linux-next et ait le statut exp\u00e9rimental, il a d\u00e9j\u00e0 atteint un niveau de stabilit\u00e9 permettant de l'utiliser pour faire fonctionner le service OpenVPN Cloud.    <\/p>\n<p>Compar\u00e9 \u00e0 la configuration bas\u00e9e sur l'interface tun, l'utilisation du module c\u00f4t\u00e9 client et serveur avec le chiffrement AES-256-GCM a permis d'atteindre une augmentation de la bande passante de 8 fois (de 370 Mbit\/s \u00e0 2950 Mbit\/s). En appliquant le module uniquement c\u00f4t\u00e9 client, la bande passante a \u00e9t\u00e9 tripl\u00e9e pour le trafic sortant et est rest\u00e9e inchang\u00e9e pour le trafic entrant. Lors de l'application du module uniquement du c\u00f4t\u00e9 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/fr\/server\/dts-los-angeles\/\"   title=\"de serveurs\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3753\">de serveurs<\/a>  la bande passante a \u00e9t\u00e9 multipli\u00e9e par 4 pour le trafic entrant et a augment\u00e9 de 35 % pour le trafic sortant.    <center><img decoding=\"async\" alt=\"Un module noyau a \u00e9t\u00e9 pr\u00e9sent\u00e9, capable d&#039;acc\u00e9l\u00e9rer consid\u00e9rablement OpenVPN\" src=\"\/wp-content\/uploads\/2021\/09\/31c2b2ba9c04019c30b2dc5fd87e9afa.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>        <\/p>\n<p>L'acc\u00e9l\u00e9ration est obtenue gr\u00e2ce \u00e0 l'externalisation de toutes les op\u00e9rations de chiffrement, de traitement des paquets et de gestion du canal de communication vers le noyau Linux, ce qui permet d'\u00e9liminer les surcharges li\u00e9es aux changements de contexte, d'optimiser le fonctionnement gr\u00e2ce \u00e0 un acc\u00e8s direct aux API internes du noyau et d'\u00e9viter les transferts de donn\u00e9es lents entre le noyau et l'espace utilisateur (le chiffrement, le d\u00e9chiffrement et le routage sont effectu\u00e9s par le module sans envoyer le trafic au gestionnaire dans l'espace utilisateur).     <\/p>\n<p>Il est not\u00e9 que l'impact n\u00e9gatif sur les performances <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/fr\/vpn\/\"   title=\"VPN\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"181\">VPN<\/a> est principalement d\u00fb aux op\u00e9rations de chiffrement gourmandes en ressources et aux latences caus\u00e9es par les changements de contexte. Pour acc\u00e9l\u00e9rer le chiffrement, des extensions processeur telles qu'Intel AES-NI ont \u00e9t\u00e9 utilis\u00e9es, mais les changements de contexte demeuraient un goulot d'\u00e9tranglement jusqu'\u00e0 l'apparition d'ovpn-dco. En plus de l'utilisation des instructions fournies par le processeur pour acc\u00e9l\u00e9rer le chiffrement, le module ovpn-dco assure \u00e9galement une s\u00e9paration des op\u00e9rations de chiffrement en segments distincts et leur traitement en mode multithreading, ce qui permet d'utiliser tous les c\u0153urs de CPU disponibles.      <\/p>\n<p>Parmi les limitations actuelles de la mise en \u0153uvre, qui seront corrig\u00e9es \u00e0 l'avenir, on note le support uniquement des modes AEAD et 'none' (sans authentification) ainsi que des chiffrements AES-GCM et CHACHA20POLY1305. Le support de DCO est pr\u00e9vu pour \u00eatre inclus dans la version OpenVPN 2.6, pr\u00e9vue pour le quatri\u00e8me trimestre de cette ann\u00e9e. Actuellement, le module est pris en charge dans le client Linux OpenVPN3 en phase de b\u00eata test et dans les versions exp\u00e9rimentales du serveur OpenVPN pour Linux. Un module similaire, ovpn-dco-win, est \u00e9galement en cours de d\u00e9veloppement pour le noyau Windows.<br \/>\n<br \/>Source : <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=55843\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \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 OpenVPN \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0438 \u043c\u043e\u0434\u0443\u043b\u044c \u044f\u0434\u0440\u0430 ovpn-dco, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u0443\u0441\u043a\u043e\u0440\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c VPN. \u041d\u0435\u0441\u043c\u043e\u0442\u0440\u044f \u043d\u0430 \u0442\u043e, \u0447\u0442\u043e \u043c\u043e\u0434\u0443\u043b\u044c \u043f\u043e\u043a\u0430 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0441 \u043e\u0433\u043b\u044f\u0434\u043a\u043e\u0439 \u0442\u043e\u043b\u044c\u043a\u043e \u043d\u0430 \u0432\u0435\u0442\u043a\u0443 linux-next \u0438 \u0438\u043c\u0435\u0435\u0442 \u0441\u0442\u0430\u0442\u0443\u0441 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u043e\u0433\u043e, \u043e\u043d \u0443\u0436\u0435 \u0434\u043e\u0441\u0442\u0438\u0433 \u0443\u0440\u043e\u0432\u043d\u044f \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0441\u0442\u0438, \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0432\u0448\u0435\u0433\u043e \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u0442\u044c \u0435\u0433\u043e \u0434\u043b\u044f \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441\u0435\u0440\u0432\u0438\u0441\u0430 OpenVPN Cloud. \u041f\u043e \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044e \u0441 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0435\u0439 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":101360,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-101359","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All 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