{"id":13222,"date":"2026-05-18T07:34:31","date_gmt":"2026-05-18T05:34:31","guid":{"rendered":"https:\/\/flyingsupporter.ch\/?p=13222"},"modified":"2026-05-18T09:12:51","modified_gmt":"2026-05-18T07:12:51","slug":"pourquoi-les-serveurs-de-sauvegarde-ne-devraient-jamais-faire-partie-du-meme-domaine","status":"publish","type":"post","link":"https:\/\/flyingsupporter.ch\/fr\/2026\/05\/18\/warum-backupserver-niemals-teil-derselben-domaene-sein-sollten\/","title":{"rendered":"Pourquoi les serveurs de sauvegarde ne devraient jamais faire partie du m\u00eame domaine"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"13222\" class=\"elementor elementor-13222\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-52adb76 e-flex e-con-boxed e-con e-parent\" data-id=\"52adb76\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-68f15df e-con-full e-flex e-con e-child\" data-id=\"68f15df\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-44cba34 e-con-full e-flex e-con e-child\" data-id=\"44cba34\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-48725cb elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"48725cb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Les sauvegardes sont souvent consid\u00e9r\u00e9es comme le dernier recours apr\u00e8s une cyber-attaque, un d\u00e9faut mat\u00e9riel ou une erreur humaine. Pourtant, une erreur de s\u00e9curit\u00e9 centrale est encore ignor\u00e9e aujourd'hui dans de nombreuses entreprises : Le serveur de sauvegarde se trouve dans le m\u00eame domaine Active Directory que les syst\u00e8mes de production.<\/strong><\/p><p><b>C'est pr\u00e9cis\u00e9ment ce qui peut conduire, en cas d'urgence, \u00e0 ce que les sauvegardes soient \u00e9galement compromises ou supprim\u00e9es.<br \/><br \/><\/b><\/p><h4>Le probl\u00e8me de base : l'administrateur du domaine contr\u00f4le tout<\/h4><p>Dans un environnement Windows classique, un administrateur de domaine dispose de droits \u00e9tendus. Si ce compte est compromis - par exemple par un hame\u00e7onnage, un logiciel malveillant ou un ransomware - l'attaquant obtient souvent l'acc\u00e8s \u00e0 tous les syst\u00e8mes au sein du domaine.<\/p><p>Si le serveur de sauvegarde se trouve \u00e9galement dans ce domaine, les cons\u00e9quences sont graves :<\/p><ul><li>Les sauvegardes peuvent \u00eatre supprim\u00e9es<\/li><li>Les t\u00e2ches de sauvegarde peuvent \u00eatre manipul\u00e9es<\/li><li>Les points de restauration disparaissent<\/li><li>Le logiciel de sauvegarde peut \u00eatre d\u00e9sactiv\u00e9<\/li><li>Les chevaux de Troie de chiffrement atteignent aussi les sauvegardes<\/li><\/ul><p><br \/>La sauvegarde perd ainsi son objectif premier : la restauration ind\u00e9pendante en cas de catastrophe.<br \/><br \/><\/p><h4>Le principe le plus important : s\u00e9parer l'infrastructure de sauvegarde<\/h4><p>Une strat\u00e9gie de sauvegarde s\u00fbre repose sur l'isolation. Le serveur de sauvegarde ne devrait donc jamais d\u00e9pendre enti\u00e8rement du m\u00eame domaine dont il doit prot\u00e9ger les syst\u00e8mes.<\/p><p>Les approches qui ont fait leurs preuves sont<\/p><ul><li>propre domaine s\u00e9par\u00e9<\/li><li>Workgroup au lieu de l'adh\u00e9sion au domaine<\/li><li>des r\u00e9seaux de gestion d\u00e9di\u00e9s<\/li><li>comptes d'administrateur s\u00e9par\u00e9s<\/li><li>des r\u00e8gles de pare-feu limit\u00e9es<\/li><li>Stockage immuable ou sauvegardes hors ligne<\/li><\/ul><p><br \/>L'objectif est clair : m\u00eame si le domaine de production est compromis, l'environnement de sauvegarde doit continuer \u00e0 fonctionner de mani\u00e8re ind\u00e9pendante.<br \/><br \/><\/p><h4>Utilisateur de service au lieu de l'administrateur de domaine<\/h4><p>Une autre erreur fr\u00e9quente est l'utilisation d'un compte d'administrateur de domaine pour les t\u00e2ches de sauvegarde.<\/p><p>De nombreuses solutions de sauvegarde n\u00e9cessitent certes un acc\u00e8s aux serveurs, aux bases de donn\u00e9es ou aux machines virtuelles, mais elles ne requi\u00e8rent pas les droits d'administration complets du domaine.<\/p><p>Il convient plut\u00f4t d'utiliser des comptes de service d\u00e9di\u00e9s :<\/p><ul><li>avec les autorisations minimales n\u00e9cessaires<\/li><li>uniquement pour les syst\u00e8mes d\u00e9finis<\/li><li>sans inscription interactive<\/li><li>avec un mot de passe fort et une rotation<\/li><li>s\u00e9par\u00e9ment par service de sauvegarde ou zone syst\u00e8me<\/li><\/ul><p><br \/>Cela r\u00e9duit consid\u00e9rablement la surface d'attaque.<br \/><br \/><\/p><h4>Principe des droits minimaux<\/h4><p>Le principe dit du \u00abmoindre privil\u00e8ge\u00bb fait partie des principes de s\u00e9curit\u00e9 les plus importants des infrastructures informatiques modernes.<\/p><p>Un service de sauvegarde n\u00e9cessite par exemple<\/p><ul><li>Acc\u00e8s \u00e0 certains partages<\/li><li>Droits de snapshot sur les hyperviseurs<\/li><li>Droits de lecture de la base de donn\u00e9es<\/li><li>Droits de s\u00e9curisation de certains syst\u00e8mes<\/li><\/ul><p><br \/>Toutefois, il n'a g\u00e9n\u00e9ralement pas besoin d'un contr\u00f4le total sur l'ensemble du domaine.<\/p><p>Moins un compte compromis poss\u00e8de de droits, moins les dommages potentiels sont importants.<br \/><br \/><\/p><h4>Aujourd'hui, les ransomwares pensent d'abord aux sauvegardes<\/h4><p>Depuis longtemps, les attaques modernes ne visent plus seulement les donn\u00e9es productives. Les groupes professionnels de ransomware recherchent activement<\/p><ul><li>Serveurs de sauvegarde<\/li><li>Logiciel de sauvegarde<\/li><li>Syst\u00e8mes NAS<\/li><li>Instances Veeam<\/li><li>Acc\u00e8s \u00e0 l'hyperviseur<\/li><li>Syst\u00e8mes de stockage<\/li><\/ul><p><br \/>Car les pirates le savent : Sans sauvegardes fonctionnelles, la probabilit\u00e9 de paiement d'une ran\u00e7on augmente massivement.<\/p><p>C'est pourquoi il ne suffit plus d'avoir \u00abune sauvegarde quelque part\u00bb. L'environnement de sauvegarde lui-m\u00eame doit \u00eatre particuli\u00e8rement prot\u00e9g\u00e9.<br \/><br \/><\/p><h4>Meilleures pratiques pour des environnements de sauvegarde s\u00e9curis\u00e9s<\/h4><p>Les mesures suivantes ont fait leurs preuves :<\/p><p><strong>1. isoler le serveur de sauvegarde<br \/><\/strong>Pas d'adh\u00e9sion directe au domaine productif ou s\u00e9paration claire via des positions de confiance distinctes.<\/p><p><strong>2. utiliser ses propres comptes de service<br \/><\/strong>Ne pas utiliser les comptes d'administrateur de domaine pour les logiciels de sauvegarde.<\/p><p><strong>3. utiliser des sauvegardes immuables<br \/><\/strong>Les sauvegardes ne doivent pas pouvoir \u00eatre supprim\u00e9es ou modifi\u00e9es pendant des p\u00e9riodes d\u00e9finies.<\/p><p><strong>4. tester la restauration des sauvegardes<br \/><\/strong>Une sauvegarde n'a de valeur que si la restauration est fiable.<\/p><p><strong>5. faire des copies hors ligne ou des copies air gap<br \/><\/strong>Au moins une copie de sauvegarde doit \u00eatre s\u00e9par\u00e9e physiquement ou logiquement.<br \/><br \/><\/p><p><strong>Une sauvegarde dans la m\u00eame zone de s\u00e9curit\u00e9 que les syst\u00e8mes de production n'offre souvent qu'une s\u00e9curit\u00e9 illusoire. Si le domaine est compromis, les sauvegardes le sont souvent aussi.<\/strong><\/p><p><strong>C'est pourquoi les serveurs de sauvegarde devraient si possible \u00eatre exploit\u00e9s en dehors du domaine \u00e0 prot\u00e9ger - combin\u00e9 avec des comptes de service s\u00e9par\u00e9s et des autorisations minimales.<\/strong><\/p><p><strong>Car une sauvegarde ne prot\u00e8ge vraiment que si elle reste inviolable en cas d'urgence.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e20699 elementor-blockquote--skin-boxed elementor-blockquote--align-center elementor-widget elementor-widget-blockquote\" data-id=\"5e20699\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"blockquote.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<blockquote class=\"elementor-blockquote\">\n\t\t\t<p class=\"elementor-blockquote__content\">\n\t\t\t\t<b>Votre partenaire pour les serveurs et les sauvegardes - Flying Supporter<br><br><\/b> <b><a href=\"https:\/\/flyingsupporter.ch\/fr\/contact-equipe\/#form\">Vous avez des questions<\/a>?<\/b>\n<br>Nous nous ferons un plaisir de vous aider.\t\t\t<\/p>\n\t\t\t\t\t<\/blockquote>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-605597d elementor-align-center elementor-widget elementor-widget-button\" data-id=\"605597d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/flyingsupporter.ch\/fr\/contact-equipe\/#form\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contactez-nous maintenant<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Les sauvegardes sont souvent consid\u00e9r\u00e9es comme le dernier recours apr\u00e8s une cyber-attaque, un d\u00e9faut mat\u00e9riel ou une erreur humaine. Pourtant, une erreur de s\u00e9curit\u00e9 centrale est encore ignor\u00e9e aujourd'hui dans de nombreuses entreprises : Le serveur de sauvegarde se trouve dans le m\u00eame domaine Active Directory que les syst\u00e8mes de production.<\/p>","protected":false},"author":25,"featured_media":13223,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"page_builder":"","footnotes":""},"categories":[95,74,77,73],"tags":[],"post_folder":[138],"class_list":["post-13222","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-empfehlungen","category-news","category-sicherheit","category-technik"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Backups gelten oft als letzte Rettung nach einem Cyberangriff, einem Hardwaredefekt oder menschlichen Fehlern. Trotzdem wird ein zentraler Sicherheitsfehler in vielen Unternehmen bis heute ignoriert: Der Backupserver befindet sich innerhalb derselben Active-Directory-Dom\u00e4ne wie die produktiven Systeme.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Jonny R\u00fcegger\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/flyingsupporter.ch\/fr\/2026\/05\/18\/warum-backupserver-niemals-teil-derselben-domaene-sein-sollten\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\n\t\t<!-- Google tag (gtag.js) -->\n<script async src=\"https:\/\/www.googletagmanager.com\/gtag\/js?id=UA-260236989-1\"><\/script>\n<script>\n  window.dataLayer = window.dataLayer || [];\n  function gtag(){dataLayer.push(arguments);}\n  gtag('js', new Date());\n\n  gtag('config', 'UA-260236989-1');\n<\/script>\n\t\t<meta property=\"og:locale\" content=\"fr_FR\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Flyingsupporter GmbH\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Warum Backupserver niemals Teil derselben Dom\u00e4ne sein sollten \u00bb Flyingsupporter GmbH\" \/>\n\t\t<meta property=\"og:description\" content=\"Backups gelten oft als letzte Rettung nach einem Cyberangriff, einem Hardwaredefekt oder menschlichen Fehlern. 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Trotzdem wird ein zentraler Sicherheitsfehler in vielen Unternehmen bis heute ignoriert: Der Backupserver befindet sich innerhalb derselben Active-Directory-Dom\u00e4ne wie die produktiven Systeme.\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/flyingsupporter.ch\/wp-content\/uploads\/2021\/07\/favcicon3-1.png\" \/>\n\t\t<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t\t<meta name=\"twitter:data1\" content=\"Jonny R\u00fcegger\" \/>\n\t\t<meta name=\"twitter:label2\" content=\"Estimation du temps de lecture\" \/>\n\t\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/2026\\\/05\\\/18\\\/warum-backupserver-niemals-teil-derselben-domaene-sein-sollten\\\/#blogposting\",\"name\":\"Warum Backupserver niemals Teil derselben Dom\\u00e4ne sein sollten \\u00bb Flyingsupporter GmbH\",\"headline\":\"Warum Backupserver niemals Teil derselben Dom\\u00e4ne sein sollten\",\"author\":{\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/author\\\/jonny-rueegger\\\/#author\"},\"publisher\":{\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/#organization\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/flyingsupporter.ch\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/heladodementa-technology-1587673_1280.webp\",\"width\":1280,\"height\":960},\"datePublished\":\"2026-05-18T07:34:31+02:00\",\"dateModified\":\"2026-05-18T09:12:51+02:00\",\"inLanguage\":\"fr-FR\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/2026\\\/05\\\/18\\\/warum-backupserver-niemals-teil-derselben-domaene-sein-sollten\\\/#webpage\"},\"isPartOf\":{\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/2026\\\/05\\\/18\\\/warum-backupserver-niemals-teil-derselben-domaene-sein-sollten\\\/#webpage\"},\"articleSection\":\"Empfehlungen, News, Sicherheit, Technik, 2026\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/2026\\\/05\\\/18\\\/warum-backupserver-niemals-teil-derselben-domaene-sein-sollten\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/category\\\/technik\\\/#listItem\",\"name\":\"Technik\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/category\\\/technik\\\/#listItem\",\"position\":2,\"name\":\"Technik\",\"item\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/category\\\/technik\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/2026\\\/05\\\/18\\\/warum-backupserver-niemals-teil-derselben-domaene-sein-sollten\\\/#listItem\",\"name\":\"Warum Backupserver niemals Teil derselben Dom\\u00e4ne sein sollten\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/2026\\\/05\\\/18\\\/warum-backupserver-niemals-teil-derselben-domaene-sein-sollten\\\/#listItem\",\"position\":3,\"name\":\"Warum Backupserver niemals Teil derselben Dom\\u00e4ne sein sollten\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/category\\\/technik\\\/#listItem\",\"name\":\"Technik\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/flyingsupporter.ch\\\/fr\\\/#organization\",\"name\":\"Flying Supporter GmbH\",\"description\":\"IT L\\u00f6sungen f\\u00fcr Ihr KMU. 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