{"id":126,"date":"2026-07-16T09:00:00","date_gmt":"2026-07-16T09:00:00","guid":{"rendered":"https:\/\/team-web-hosting.example\/?p=126"},"modified":"2026-07-16T09:00:00","modified_gmt":"2026-07-16T09:00:00","slug":"proteger-site-attaques-ddos","status":"publish","type":"post","link":"https:\/\/webhostingproduct.ovh\/?p=126","title":{"rendered":"Prot\u00e9ger son site des attaques DDoS"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"\/MEDIA_BASE_URL\/proteger-site-attaques-ddos.png\" alt=\"Illustration \u2014 Prot\u00e9ger son site des attaques DDoS\"\/><\/figure>\n\n<p>Une attaque par d\u00e9ni de service distribu\u00e9 (DDoS) vise \u00e0 rendre un site ou un service indisponible en le submergeant de trafic. Ces attaques se sont banalis\u00e9es et peuvent frapper toute organisation. La bonne nouvelle : des protections efficaces existent, souvent int\u00e9gr\u00e9es \u00e0 l&rsquo;infrastructure.<\/p>\n\n<h2>Le m\u00e9canisme d&rsquo;une attaque DDoS<\/h2>\n<p>Une attaque DDoS mobilise un grand nombre de machines compromises pour envoyer simultan\u00e9ment un volume massif de requ\u00eates vers une cible. D\u00e9bord\u00e9e, l&rsquo;infrastructure ne peut plus r\u00e9pondre aux utilisateurs l\u00e9gitimes. L&rsquo;objectif n&rsquo;est g\u00e9n\u00e9ralement pas le vol de donn\u00e9es, mais l&rsquo;indisponibilit\u00e9 \u2014 avec ses cons\u00e9quences commerciales et d&rsquo;image.<\/p>\n\n<h2>Les types d&rsquo;attaques<\/h2>\n<ul>\n<li><strong>Volum\u00e9triques :<\/strong> saturer la bande passante par un d\u00e9luge de trafic.<\/li>\n<li><strong>Protocolaires :<\/strong> \u00e9puiser les ressources des \u00e9quipements r\u00e9seau en exploitant le fonctionnement des protocoles.<\/li>\n<li><strong>Applicatives :<\/strong> cibler des fonctions pr\u00e9cises du site avec des requ\u00eates en apparence l\u00e9gitimes, plus difficiles \u00e0 distinguer.<\/li>\n<\/ul>\n\n<h2>Comment se prot\u00e9ger<\/h2>\n<p>La d\u00e9fense repose sur plusieurs couches :<\/p>\n<ul>\n<li><strong>Filtrage en amont :<\/strong> d\u00e9tecter et absorber le trafic malveillant avant qu&rsquo;il n&rsquo;atteigne le site.<\/li>\n<li><strong>Capacit\u00e9 r\u00e9seau :<\/strong> une infrastructure dimensionn\u00e9e pour encaisser des volumes importants.<\/li>\n<li><strong>Pare-feu applicatif :<\/strong> pour contrer les attaques ciblant la couche applicative.<\/li>\n<li><strong>R\u00e9partition de charge :<\/strong> diluer le trafic sur plusieurs ressources.<\/li>\n<\/ul>\n\n<h2>La protection par l&rsquo;infrastructure<\/h2>\n<p>Se prot\u00e9ger seul contre une attaque volum\u00e9trique majeure est hors de port\u00e9e de la plupart des organisations : cela demande une capacit\u00e9 r\u00e9seau consid\u00e9rable. C&rsquo;est pourquoi la protection anti-DDoS est de plus en plus assur\u00e9e au niveau de l&rsquo;infrastructure d&rsquo;h\u00e9bergement, en amont du site.<\/p>\n\n<h2>Un atout d&rsquo;un h\u00e9bergeur d&rsquo;envergure<\/h2>\n<p>Un h\u00e9bergeur disposant d&rsquo;un vaste r\u00e9seau peut absorber et filtrer les attaques \u00e0 grande \u00e9chelle, l\u00e0 o\u00f9 un site isol\u00e9 serait submerg\u00e9. OVHcloud int\u00e8gre une protection anti-DDoS \u00e0 son infrastructure, ce qui reporte l&rsquo;essentiel de cette d\u00e9fense sur l&rsquo;h\u00e9bergeur. Il reste toutefois pertinent de compl\u00e9ter par des mesures applicatives adapt\u00e9es \u00e0 votre site.<\/p>","protected":false},"excerpt":{"rendered":"<p>Les attaques par d\u00e9ni de service distribu\u00e9 saturent un site pour le rendre indisponible. Comprendre la menace et les moyens de s&rsquo;en prot\u00e9ger.<\/p>\n","protected":false},"author":1,"featured_media":1126,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[4],"tags":[],"class_list":["post-126","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-souverainete-securite"],"_links":{"self":[{"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/posts\/126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=126"}],"version-history":[{"count":0,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/posts\/126\/revisions"}],"wp:attachment":[{"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}