{"id":13709,"date":"2024-11-14T09:05:34","date_gmt":"2024-11-14T14:05:34","guid":{"rendered":"https:\/\/www.cscdbs.com\/blog\/?p=13709"},"modified":"2026-01-15T05:23:35","modified_gmt":"2026-01-15T10:23:35","slug":"apercu-du-protocole-dnssec","status":"publish","type":"post","link":"https:\/\/www.cscdbs.com\/blog\/apercu-du-protocole-dnssec\/","title":{"rendered":"Aper\u00e7u du protocole DNSSEC"},"content":{"rendered":"\n<p>Assurer la s\u00e9curit\u00e9 des noms de domaine et des sites Internet est essentiel pour les entreprises du monde d&#8217;aujourd&#8217;hui. Le protocole DNSSEC (abr\u00e9viation de Domain Name System Security Extensions) est un outil cl\u00e9 pour am\u00e9liorer cette s\u00e9curit\u00e9. Si vous ne connaissez pas le protocole DNSSEC, ne vous inqui\u00e9tez pas. Cet article vous expliquera de quoi il s&#8217;agit, pourquoi il est important, comment il fonctionne et comment vous pouvez commencer \u00e0 s\u00e9curiser vos actifs.<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>En quoi consiste le protocole DNSSEC&nbsp;?<\/strong><\/h2>\n\n\n\n<p>Pour comprendre le protocole DNSSEC, nous devons d&#8217;abord nous pencher sur le fonctionnement du syst\u00e8me de noms de domaine (DNS). Le DNS est en quelque sorte l&#8217;annuaire t\u00e9l\u00e9phonique d&#8217;Internet. Lorsque vous tapez le nom d&#8217;un site Internet, comme exemple.com, dans votre navigateur, le DNS traduit ce nom en une adresse de protocole Internet (IP) o\u00f9 le site Internet est h\u00e9berg\u00e9, afin que votre navigateur puisse charger le bon site.<\/p>\n\n\n\n<p>Le probl\u00e8me\u00a0? Le DNS n&#8217;a pas \u00e9t\u00e9 con\u00e7u en tenant compte des aspects s\u00e9curitaires. Cela le rend vuln\u00e9rable \u00e0 certains types de cyberattaques, telles que <a href=\"https:\/\/www.cscdbs.com\/fr\/ressources\/empoisonnement-dns\/\" target=\"_blank\" rel=\"noreferrer noopener\">l&#8217;empoisonnement du cache DNS <\/a>, o\u00f9 les hackers peuvent manipuler les r\u00e9ponses du DNS pour rediriger les utilisateurs vers un site Internet malveillant. Un <a href=\"https:\/\/www.cscdbs.com\/fr\/ressources\/detournement-dns\/\" target=\"_blank\" rel=\"noreferrer noopener\">d\u00e9tournement de DNS<\/a> est similaire, mais \u00e0 certains \u00e9gards pire, car il s&#8217;agit g\u00e9n\u00e9ralement d&#8217;une cyberattaque plus grave qui n\u00e9cessite des r\u00e9parations plus \u00e9tendues.<\/p>\n\n\n\n<p>Le protocole DNSSEC correspond \u00e0 une suite de sp\u00e9cifications IETF (Internet Engineering Task Force) permettant de s\u00e9curiser certains types d&#8217;informations fournies par le DNS.<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pourquoi le protocole DNSSEC est-il important&nbsp;?<\/strong><\/h2>\n\n\n\n<p>Les cyberattaques \u00e9voluent constamment et les attaquants trouvent des moyens de plus en plus sophistiqu\u00e9s d&#8217;exploiter les vuln\u00e9rabilit\u00e9s. Les attaques d&#8217;usurpation de DNS et d&#8217;empoisonnement du cache DNS, par exemple, sont des attaques courantes et dangereuses qui peuvent entra\u00eener&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Des vols de donn\u00e9es&nbsp;: les utilisateurs pourraient saisir sans le savoir des donn\u00e9es \u00e0 caract\u00e8re personnel sur un faux site Internet contr\u00f4l\u00e9 par des attaquants.<\/li>\n\n\n\n<li>Des infections par des maliciels&nbsp;: l&#8217;usurpation de DNS peut rediriger les utilisateurs vers des sites Internet qui envoient des logiciels malveillants sur leurs appareils.<\/li>\n\n\n\n<li>Des dommages \u00e0 la r\u00e9putation&nbsp;: si votre domaine est compromis, cela peut nuire \u00e0 la confiance accord\u00e9e \u00e0 votre marque et \u00e0 votre r\u00e9putation.<\/li>\n<\/ul>\n\n\n\n<p>En mettant en oeuvre&nbsp; le protocole DNSSEC, vous pouvez contribuer \u00e0 pr\u00e9venir ces risques en vous assurant que les enregistrements DNS de votre domaine sont authentiques et qu&#8217;ils n&#8217;ont pas \u00e9t\u00e9 modifi\u00e9s pendant le transit. Cela renforce la confiance de vos visiteurs et prot\u00e8ge votre pr\u00e9sence en ligne.<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Comment fonctionne le protocole DNSSEC<\/strong><\/h2>\n\n\n\n<p>Le protocole DNSSEC utilise un processus appel\u00e9 signature de zone pour prot\u00e9ger les informations DNS. Voici une version simplifi\u00e9e de son fonctionnement&nbsp;:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Authentification de l&#8217;origine des donn\u00e9es. DNSSEC v\u00e9rifie que les donn\u00e9es que vous recevez proviennent de la source attendue.<\/li>\n\n\n\n<li>Protection de l&#8217;int\u00e9grit\u00e9 des donn\u00e9es. DNSSEC garantit que les donn\u00e9es que vous recevez n&#8217;ont pas \u00e9t\u00e9 alt\u00e9r\u00e9es pendant la transmission.<\/li>\n\n\n\n<li>Cr\u00e9ation d&#8217;une cha\u00eene de confiance. Le protocole DNSSEC cr\u00e9e une cha\u00eene de confiance entre les serveurs racines du DNS et votre domaine, garantissant que chaque \u00e9tape du processus de recherche DNS est s\u00e9curis\u00e9e. Cette cha\u00eene de confiance permet d&#8217;emp\u00eacher les attaquants d&#8217;ins\u00e9rer de fausses informations DNS.<\/li>\n<\/ol>\n\n\n\n<p>Le protocole DNSSEC fonctionne donc en signant num\u00e9riquement les donn\u00e9es afin que vous puissiez \u00eatre certain qu&#8217;elles sont valides. Il propose une m\u00e9thode de v\u00e9rification des r\u00e9sultats d&#8217;une recherche DNS pour s&#8217;assurer que les r\u00e9sultats proviennent de la bonne source. Cependant, il ne chiffre pas les donn\u00e9es.<\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pour commencer<\/strong><\/h2>\n\n\n\n<p>Vous pouvez mettre en \u0153uvre le protocole DNSSEC en deux \u00e9tapes.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Signez la zone avec DNSSEC<\/strong>, avec une sortie appel\u00e9e un enregistrement de d\u00e9l\u00e9gation de signature (DS). Cette op\u00e9ration est effectu\u00e9e par le fournisseur DNS. C&#8217;est comme mettre un cadenas sur le DNS pour ce domaine sp\u00e9cifique.<\/li>\n\n\n\n<li><strong>Conservez les enregistrements DS au niveau du registre <\/strong>. Cette op\u00e9ration ne peut \u00eatre effectu\u00e9e que par le registrar et \u00e9quivaut \u00e0 la cl\u00e9 qui ne peut \u00eatre ins\u00e9r\u00e9e que dans le cadenas cr\u00e9\u00e9 par le fournisseur DNS.<\/li>\n<\/ol>\n\n\n\n<p>Pour obtenir des conseils et des bonnes pratiques, consultez l&#8217;article \u00ab&nbsp;<a href=\"https:\/\/www.cscglobal.com\/cscglobal\/pdfs\/DBS\/6_Ways_to_Strengthen_DNS_Security_FR.pdf\">6 fa\u00e7ons de renforcer la s\u00e9curit\u00e9 DNS<\/a>&nbsp;\u00bb.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Travailler avec un registrar de confiance<\/strong><\/h2>\n\n\n\n<p>Un registrar d&#8217;entreprise est beaucoup plus susceptible d&#8217;avoir des mesures de s\u00e9curit\u00e9 robustes pour prot\u00e9ger votre infrastructure. Avec le bon partenaire, vous pouvez ajouter rapidement et efficacement cette s\u00e9curit\u00e9 suppl\u00e9mentaire \u00e0 votre site Internet. CSC fournit&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DNSSEC cl\u00e9 en main pour la signature de zone<\/li>\n\n\n\n<li>Prise en charge de bout en bout de la mise en \u0153uvre du DNSSEC<\/li>\n\n\n\n<li>Identification automatique des domaines n\u00e9cessitant une mise en \u0153uvre du DNSSEC via CSC <a href=\"https:\/\/www.cscdbs.com\/fr\/surveillance-sous-domaine\/\" target=\"_blank\" rel=\"noreferrer noopener\">DomainSec\u2120<\/a><\/li>\n<\/ul>\n\n\n\n<p><a href=\"https:\/\/www.cscdbs.com\/fr\/solutions\/ddos-services-dns\/\" target=\"_blank\" rel=\"noreferrer noopener\">Apprenez-en plus<\/a> sur la protection de votre DNS.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Assurer la s\u00e9curit\u00e9 des noms de domaine et des sites Internet est essentiel pour les entreprises du monde d&#8217;aujourd&#8217;hui. Le protocole DNSSEC (abr\u00e9viation de Domain Name System Security Extensions) est un outil cl\u00e9 pour am\u00e9liorer cette s\u00e9curit\u00e9. Si vous ne connaissez pas le protocole DNSSEC, ne vous inqui\u00e9tez pas. Cet article vous expliquera de quoi [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":10451,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[545],"tags":[],"class_list":["post-13709","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aper\u00e7u du protocole DNSSEC | CSC<\/title>\n<meta name=\"description\" content=\"Assurer la s\u00e9curit\u00e9 des noms de domaine et des sites Internet est essentiel pour les entreprises du monde d&#039;aujourd&#039;hui. 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