{"id":184,"date":"2026-11-02T09:00:00","date_gmt":"2026-11-02T08:00:00","guid":{"rendered":"https:\/\/www.cisilino.com\/?p=184"},"modified":"2026-11-02T09:00:04","modified_gmt":"2026-11-02T08:00:04","slug":"attaque-par-force-brute","status":"publish","type":"post","link":"https:\/\/www.cisilino.com\/fr\/2026\/11\/02\/attaque-par-force-brute\/","title":{"rendered":"Attaque par force brute sur WordPress : comment la bloquer sur la connexion"},"content":{"rendered":"<p>\u00c7a se passe ainsi : le site est lent la nuit et personne ne comprend pourquoi. Dans les logs, des centaines de requ\u00eates vers <code>wp-login.php<\/code> depuis quelques adresses. Les identifiants essay\u00e9s sont <em>admin<\/em> ou le nom du domaine. C&rsquo;est une <strong>attaque par force brute sur WordPress<\/strong>. Aucune faille \u00e0 exploiter, juste des essais jusqu&rsquo;\u00e0 ce qu&rsquo;un mot de passe c\u00e8de.<\/p>\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.cisilino.com\/wp-content\/uploads\/2026\/10\/attaque-brute-force-wordpress-connexion.webp\" alt=\"Attaque par force brute : de nombreuses lignes fines convergent vers un cercle jaune barr\u00e9\" width=\"1200\" height=\"630\"\/><\/figure>\n<h2>Ce que fait le plugin quand l&rsquo;attaque d\u00e9marre<\/h2>\n<p>Chaque connexion \u00e9chou\u00e9e pendant une attaque par force brute est not\u00e9e : IP, identifiant essay\u00e9, r\u00e9sultat, heure. Jamais le mot de passe. Quand une IP d\u00e9passe votre seuil, le plugin ajoute une r\u00e8gle \u00e0 <code>.htaccess<\/code> (compatible avec Apache 2.4 et 2.2). D\u00e8s lors, les requ\u00eates de cette adresse s&rsquo;arr\u00eatent au serveur web. WordPress n&rsquo;est m\u00eame pas charg\u00e9 : le site respire \u00e0 nouveau.<\/p>\n<p>Un d\u00e9tail qui compte : le compteur est une op\u00e9ration atomique sur la base de donn\u00e9es. Envoyer cent tentatives au m\u00eame instant ne permet pas de franchir le seuil.<\/p>\n<h2>O\u00f9 voir ce qui s&rsquo;est pass\u00e9<\/h2>\n<p>Dans <em>R\u00e9glages \u203a Cisilino Site Defense Network<\/em>, vous trouvez l&rsquo;onglet des IP bloqu\u00e9es apr\u00e8s une attaque par force brute. Un filtre est disponible, avec la liste des 50 derni\u00e8res d\u00e9tections. Si un client s&rsquo;est bloqu\u00e9 lui-m\u00eame, \u00ab D\u00e9bloquer \u00bb sur la ligne et c&rsquo;est r\u00e9gl\u00e9.<\/p>\n<h2>Quand les IP d&rsquo;une attaque par force brute sont nombreuses<\/h2>\n<p>Le blocage par IP a une limite connue. Si l&rsquo;attaque par force brute vient de centaines d&rsquo;adresses diff\u00e9rentes, chacune doit d&rsquo;abord franchir le seuil. Avec le r\u00e9seau Cisilino, une IP vue en \u00e9chec sur un autre site de votre client est bloqu\u00e9e d&rsquo;avance. Dans tous les cas, utilisez des identifiants peu \u00e9vidents et des mots de passe longs. Le plugin supprime le bruit, mais ne rend pas fort un mot de passe faible.<\/p>\n<p>Sur un h\u00e9bergement nginx, le plugin enregistre les tentatives mais ne peut pas \u00e9crire la r\u00e8gle au niveau du serveur.<\/p>\n<p>Pour aller plus loin, l&rsquo;<a href=\"https:\/\/owasp.org\/www-community\/controls\/Blocking_Brute_Force_Attacks\" target=\"_blank\" rel=\"noopener\">OWASP<\/a> d\u00e9crit les m\u00e9thodes pour bloquer ce type d&rsquo;attaque par force brute.<\/p>\n<h2>Questions fr\u00e9quentes<\/h2>\n<h3>Comment bloquer une attaque par force brute sur WordPress ?<\/h3>\n<p>En comptant les connexions \u00e9chou\u00e9es par IP et en bloquant celles qui d\u00e9passent un seuil. Le plugin le fait en \u00e9crivant une r\u00e8gle dans .htaccess : la requ\u00eate s&rsquo;arr\u00eate avant WordPress.<\/p>\n<h3>Le plugin enregistre-t-il les mots de passe essay\u00e9s ?<\/h3>\n<p>Non. Il enregistre l&rsquo;IP, l&rsquo;identifiant tent\u00e9, le r\u00e9sultat et l&rsquo;heure, jamais le mot de passe.<\/p>\n<h3>Puis-je d\u00e9bloquer une IP bloqu\u00e9e par erreur ?<\/h3>\n<p>Oui, depuis la liste des IP bloqu\u00e9es, avec le bouton D\u00e9bloquer sur chaque ligne.<\/p>\n<h2>\u00c0 lire aussi<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.cisilino.com\/?p=85\">Liste blanche d&rsquo;IP WordPress : d\u00e9blocage et bannissements manuels temporis\u00e9s<\/a><\/li>\n<li><a href=\"https:\/\/www.cisilino.com\/?p=103\">Blocage d&rsquo;IP partag\u00e9 entre sites WordPress avec le panneau<\/a><\/li>\n<li><a href=\"https:\/\/www.cisilino.com\/fr\/2026\/10\/29\/plugin-securite-wordpress-cisilino\/\">Cisilino Site Defense Network : le plugin de s\u00e9curit\u00e9 WordPress<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Une attaque par force brute sur wp-login.php peut durer toute la nuit. Comment le plugin bloque les IP dans .htaccess avant m\u00eame le chargement de WordPress.<\/p>\n","protected":false},"author":1,"featured_media":597,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"wpai_generated_summary":"","footnotes":""},"categories":[100],"tags":[157,12,205,15],"class_list":["post-184","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-csdn-fr","tag-blocage-d-ip","tag-brute-force","tag-connexion-wordpress","tag-wp-login-php"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Une attaque par force brute sur wp-login.php peut durer toute la nuit. 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