{"id":26704,"date":"2022-04-22T11:53:00","date_gmt":"2022-04-22T09:53:00","guid":{"rendered":"https:\/\/perseus.de\/ports-ouverts\/"},"modified":"2026-03-30T10:57:27","modified_gmt":"2026-03-30T08:57:27","slug":"ports-ouverts","status":"publish","type":"post","link":"https:\/\/perseus.de\/fr\/ports-ouverts\/","title":{"rendered":"Ports ouverts"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"26704\" class=\"elementor elementor-26704 elementor-22372\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cab3f18 e-flex e-con-boxed e-con e-parent\" data-id=\"cab3f18\" 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-2a02b8b e-con-full e-flex e-con e-child\" data-id=\"2a02b8b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-c435912 e-con-full e-flex e-con e-child\" data-id=\"c435912\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4f80ded elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"4f80ded\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Ports ouverts\n<\/h1>\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-2d061a7 elementor-widget elementor-widget-image\" data-id=\"2d061a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page-300x300.png\" class=\"attachment-medium size-medium wp-image-25818\" alt=\"\" srcset=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page-300x300.png 300w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page-150x150.png 150w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page-768x768.png 768w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page.png 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\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<div class=\"elementor-element elementor-element-52ce15be e-flex e-con-boxed e-con e-parent\" data-id=\"52ce15be\" 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-34573480 e-con-full e-flex e-con e-child\" data-id=\"34573480\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e839854 elementor-widget elementor-widget-text-editor\" data-id=\"e839854\" 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<header class=\"Single__header Background Background--lightBlue\"><div class=\"container\"><div class=\"grid grid--size12 grid--size6D\"><div class=\"Share\"><div class=\"Module Text Background Background--lightBlue\"><div class=\"container\"><div class=\"grid grid--size12 grid--size8T\"><div class=\"Module Text Background Background--lightBlue\"><div class=\"container\"><div class=\"grid grid--size12 grid--size8T\"><div class=\"Module Text Background Background--lightBlue\"><div class=\"container\"><div class=\"grid grid--size12 grid--size8T\"><div><p data-start=\"169\" data-end=\"432\">Un \u00ab port ouvert \u00bb est un point d\u2019acc\u00e8s sur un ordinateur ou un serveur qui est accessible et actif pour le trafic. Les programmes et services communiquent entre eux via des ports \u2013 ils sont donc n\u00e9cessaires, mais aussi potentiellement vuln\u00e9rables. <\/p><h4 data-start=\"434\" data-end=\"732\"> <\/h4><h4 data-start=\"434\" data-end=\"732\"><strong data-start=\"434\" data-end=\"465\">Qu&rsquo;est-ce que cela signifie en d\u00e9tail ?<\/strong><\/h4><p data-start=\"434\" data-end=\"732\">Un port fonctionne comme une porte : s\u2019il est ouvert, le trafic de donn\u00e9es peut \u00eatre autoris\u00e9 \u00e0 passer \u2013 par exemple, pour acc\u00e9der \u00e0 des sites web (port 80\/443) ou \u00e0 la maintenance \u00e0 distance (port 22 pour SSH). Un port \u00ab ouvert \u00bb signifie que ce service est accessible et accepte les connexions. <\/p><h4 data-start=\"734\" data-end=\"807\"> <\/h4><h4 data-start=\"734\" data-end=\"807\"><strong data-start=\"734\" data-end=\"768\">Pourquoi avez-vous besoin de ports ouverts ?<\/strong><\/h4><p data-start=\"734\" data-end=\"807\">Des ports ouverts sont n\u00e9cessaires afin que :<\/p><ul data-start=\"808\" data-end=\"981\"><li data-start=\"808\" data-end=\"837\"><p data-start=\"810\" data-end=\"837\">Les sites web sont accessibles<\/p><\/li><li data-start=\"838\" data-end=\"875\"><p data-start=\"840\" data-end=\"875\">La communication par e-mail fonctionne<\/p><\/li><li data-start=\"876\" data-end=\"937\"><p data-start=\"878\" data-end=\"937\">L\u2019acc\u00e8s \u00e0 distance (par exemple maintenance \u00e0 distance ou VPN) est possible<\/p><\/li><li data-start=\"938\" data-end=\"981\"><p data-start=\"940\" data-end=\"981\">Les serveurs peuvent communiquer avec les clients<\/p><\/li><\/ul><h4 data-start=\"983\" data-end=\"1042\"> <\/h4><h4 data-start=\"983\" data-end=\"1042\"><strong data-start=\"983\" data-end=\"1040\">O\u00f9 puis-je rencontrer ce sujet dans le travail quotidien d\u2019un expert ?<\/strong><\/h4><ul data-start=\"1043\" data-end=\"1537\"><li data-start=\"1043\" data-end=\"1130\"><p data-start=\"1045\" data-end=\"1130\"><strong data-start=\"1045\" data-end=\"1078\">Les fournisseurs de services informatiques ouvrent des ports<\/strong>, par exemple pour configurer un acc\u00e8s \u00e0 distance \u00e0 un syst\u00e8me<\/p><\/li><li data-start=\"1131\" data-end=\"1233\"><p data-start=\"1133\" data-end=\"1233\"><strong data-start=\"1133\" data-end=\"1162\">Les serveurs web ou de messagerie<\/strong> de l\u2019entreprise ont besoin que certains ports ouverts soient accessibles<\/p><\/li><li data-start=\"1234\" data-end=\"1336\"><p data-start=\"1236\" data-end=\"1336\">Les <strong data-start=\"1240\" data-end=\"1268\">configurations<\/strong> de pare-feu doivent d\u00e9cider quels ports sont ouverts ou ferm\u00e9s<\/p><\/li><li data-start=\"1337\" data-end=\"1423\"><p data-start=\"1339\" data-end=\"1423\"><strong data-start=\"1339\" data-end=\"1376\">Les analyses de vuln\u00e9rabilit\u00e9s ou les p\u00e9n\u00e9trations<\/strong> r\u00e9v\u00e8lent r\u00e9guli\u00e8rement des ports ouverts non s\u00e9curis\u00e9s<\/p><\/li><li data-start=\"1424\" data-end=\"1537\"><p data-start=\"1426\" data-end=\"1537\"><strong data-start=\"1426\" data-end=\"1443\">Les cyberattaques<\/strong> (par exemple les ransomwares) utilisent souvent des ports obsol\u00e8tes ou inutilement ouverts comme passerelle<\/p><\/li><\/ul><h4 data-start=\"1544\" data-end=\"1600\"> <\/h4><h4 data-start=\"1544\" data-end=\"1600\"><strong data-start=\"1544\" data-end=\"1600\">Protection contre les cyberattaques via des ports ouverts<\/strong><\/h4><ol data-start=\"1602\" data-end=\"2997\"><li data-start=\"1602\" data-end=\"1785\"><p data-start=\"1605\" data-end=\"1785\"><strong data-start=\"1605\" data-end=\"1642\">Ne laissez que les ports n\u00e9cessaires ouverts<\/strong><br data-start=\"1642\" data-end=\"1645\">Fermez syst\u00e9matiquement tous les ports qui ne sont pas absolument n\u00e9cessaires \u00e0 l\u2019exploitation. Chaque \u00ab porte ouverte \u00bb inutile augmente le risque. <\/p><\/li><li data-start=\"1787\" data-end=\"2010\"><p data-start=\"1790\" data-end=\"2010\"><strong data-start=\"1790\" data-end=\"1827\">Configurez votre pare-feu de mani\u00e8re coh\u00e9rente<\/strong><br data-start=\"1827\" data-end=\"1830\">Utilisez un pare-feu central (par exemple dans le routeur ou la solution UTM) pour permettre ou bloquer l\u2019acc\u00e8s de mani\u00e8re cibl\u00e9e. Les pare-feux Windows\/Linux devraient aussi \u00eatre activ\u00e9s. <\/p><\/li><li data-start=\"2012\" data-end=\"2207\"><p data-start=\"2015\" data-end=\"2207\"><strong data-start=\"2015\" data-end=\"2057\">Restreindre l\u2019acc\u00e8s (par exemple, bas\u00e9 sur IP)<\/strong><br data-start=\"2057\" data-end=\"2060\">Restreignez l\u2019acc\u00e8s \u00e0 distance \u00e0 des adresses IP ou \u00e0 des pays sp\u00e9cifiques. Cela emp\u00eache tout le monde dans le monde d\u2019acc\u00e9der \u00e0 des services ouverts. <\/p><\/li><li data-start=\"2209\" data-end=\"2434\"><p data-start=\"2212\" data-end=\"2434\"><strong data-start=\"2212\" data-end=\"2247\">VPN au lieu du partage direct des ports<\/strong><br data-start=\"2247\" data-end=\"2250\">Si possible, \u00e9vitez le partage direct de services sensibles tels que le bureau \u00e0 distance (RDP) ou le SSH. Utilisez plut\u00f4t un VPN s\u00e9curis\u00e9 pour permettre un acc\u00e8s \u00e0 distance. <\/p><\/li><li data-start=\"2436\" data-end=\"2601\"><p data-start=\"2439\" data-end=\"2601\"><strong data-start=\"2439\" data-end=\"2465\">Maintenir les services \u00e0 jour<\/strong><br data-start=\"2465\" data-end=\"2468\">Assurez-vous de mettre \u00e0 jour r\u00e9guli\u00e8rement les syst\u00e8mes et services qui fonctionnent derri\u00e8re les ports. Les logiciels obsol\u00e8tes sont souvent vuln\u00e9rables. <\/p><\/li><li data-start=\"2603\" data-end=\"2779\"><p data-start=\"2606\" data-end=\"2779\"><strong data-start=\"2606\" data-end=\"2640\">Effectuer des scans de port (les faire effectuer)<\/strong><br data-start=\"2640\" data-end=\"2643\">Effectuer des scans r\u00e9guliers des ports (par exemple avec l\u2019aide d\u2019un fournisseur de services informatiques) pour d\u00e9tecter les ports ouverts involontairement \u00e0 un stade pr\u00e9coce.<\/p><\/li><li data-start=\"2781\" data-end=\"2997\"><p data-start=\"2784\" data-end=\"2997\"><strong data-start=\"2784\" data-end=\"2809\">Installation de la surveillance<\/strong><br data-start=\"2809\" data-end=\"2812\">Surveillez l\u2019activit\u00e9 sur les ports ouverts \u2013 par exemple via un syst\u00e8me de d\u00e9tection d\u2019intrusion (IDS) ou une \u00e9valuation de journal. Ainsi, les attaques ou abus peuvent \u00eatre d\u00e9tect\u00e9s \u00e0 un stade pr\u00e9coce.<\/p><\/li><\/ol><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/header>\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<div class=\"elementor-element elementor-element-cb1ddf2 e-flex e-con-boxed e-con e-parent\" data-id=\"cb1ddf2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cfc7a61 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"cfc7a61\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\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>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Ports ouverts Un \u00ab port ouvert \u00bb est un point d\u2019acc\u00e8s sur un ordinateur ou un serveur qui est accessible et actif pour le trafic. Les programmes et services communiquent entre eux via des ports \u2013 ils sont donc n\u00e9cessaires, mais aussi potentiellement vuln\u00e9rables. Qu&rsquo;est-ce que cela signifie en d\u00e9tail ? Un port fonctionne comme [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[58],"tags":[],"class_list":["post-26704","post","type-post","status-publish","format-standard","hentry","category-cyberlexique"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ports ouverts - Perseus Technologies<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/perseus.de\/fr\/ports-ouverts\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ports ouverts - Perseus Technologies\" \/>\n<meta property=\"og:description\" content=\"Ports ouverts Un \u00ab port ouvert \u00bb est un point d\u2019acc\u00e8s sur un ordinateur ou un serveur qui est accessible et actif pour le trafic. Les programmes et services communiquent entre eux via des ports \u2013 ils sont donc n\u00e9cessaires, mais aussi potentiellement vuln\u00e9rables. Qu&rsquo;est-ce que cela signifie en d\u00e9tail ? 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Les programmes et services communiquent entre eux via des ports \u2013 ils sont donc n\u00e9cessaires, mais aussi potentiellement vuln\u00e9rables. Qu&rsquo;est-ce que cela signifie en d\u00e9tail ? Un port fonctionne comme [&hellip;]","og_url":"https:\/\/perseus.de\/fr\/ports-ouverts\/","og_site_name":"Perseus Technologies","article_published_time":"2022-04-22T09:53:00+00:00","article_modified_time":"2026-03-30T08:57:27+00:00","og_image":[{"width":800,"height":800,"url":"https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page.png","type":"image\/png"}],"author":"Xenia Silbe","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Xenia Silbe","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/perseus.de\/fr\/ports-ouverts\/#article","isPartOf":{"@id":"https:\/\/perseus.de\/fr\/ports-ouverts\/"},"author":{"name":"Xenia Silbe","@id":"https:\/\/perseus.de\/#\/schema\/person\/42cdb0ff9720a4c92a2613f686b32f46"},"headline":"Ports ouverts","datePublished":"2022-04-22T09:53:00+00:00","dateModified":"2026-03-30T08:57:27+00:00","mainEntityOfPage":{"@id":"https:\/\/perseus.de\/fr\/ports-ouverts\/"},"wordCount":514,"commentCount":0,"publisher":{"@id":"https:\/\/perseus.de\/#organization"},"image":{"@id":"https:\/\/perseus.de\/fr\/ports-ouverts\/#primaryimage"},"thumbnailUrl":"https:\/\/perseus.de\/wp-content\/uploads\/2025\/05\/Headerbild-Glossary-Page-300x300.png","articleSection":["Cyberlexique"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/perseus.de\/fr\/ports-ouverts\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/perseus.de\/fr\/ports-ouverts\/","url":"https:\/\/perseus.de\/fr\/ports-ouverts\/","name":"Ports ouverts - 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