{"id":8010,"date":"2026-09-05T23:41:35","date_gmt":"2026-09-05T21:41:35","guid":{"rendered":"https:\/\/scan-doc.fr\/blog\/articles\/nmapfe\/"},"modified":"2026-09-05T23:41:35","modified_gmt":"2026-09-05T21:41:35","slug":"nmapfe","status":"publish","type":"post","link":"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/nmapfe\/","title":{"rendered":"Nmap : Guide Scan R\u00e9seau Complet 2026"},"content":{"rendered":"<style>\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Space+Grotesk:wght@600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@500&display=swap');\n.sdoc-tuto-wrap{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;font-size:17px;line-height:1.65;color:#101828;max-width:100%;}\n.sdoc-tuto-wrap h2{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:clamp(24px,3.2vw,32px);letter-spacing:-0.01em;color:#0b1220;margin:52px 0 18px;}\n.sdoc-tuto-wrap h3{font-family:'Space 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0;}\n.sdoc-tuto-retain .h{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:16px;margin-bottom:12px;color:#fff!important;}\n.sdoc-tuto-retain ul{margin:0;padding-left:20px;}\n.sdoc-tuto-retain li,.sdoc-tuto-retain p,.sdoc-tuto-retain strong,.sdoc-tuto-retain a,.sdoc-tuto-retain span{color:#eef3f9!important;}\n.sdoc-tuto-retain strong,.sdoc-tuto-retain b{color:#fff!important;}\n.sdoc-tuto-retain li{margin-bottom:8px;font-size:15px;}\n.sdoc-tuto-morelinks{display:flex;flex-direction:column;gap:10px;margin:20px 0;}\n.sdoc-tuto-morelinks a{display:flex;align-items:center;gap:10px;text-decoration:none;border:1px solid #dbe4ff;border-radius:10px;padding:12px 16px;color:#0b1220;font-weight:500;font-size:14.5px;transition:.25s ease;}\n.sdoc-tuto-morelinks a:hover{transform:translateY(-3px);border-color:#2f5eea;box-shadow:0 12px 28px -16px rgba(16,24,40,.2);}\n.sdoc-tuto-morelinks a span.arw{color:#2f5eea;font-weight:700;}\n.sdoc-tuto-wrap details{border:1px solid #e6e8ee;border-radius:10px;padding:14px 18px;margin-bottom:12px;background:#fff;}\n.sdoc-tuto-wrap details summary{font-family:'Space Grotesk',sans-serif;font-weight:600;cursor:pointer;color:#0b1220;font-size:15.5px;}\n.sdoc-tuto-wrap details[open] summary{color:#2f5eea;}\n.sdoc-tuto-wrap details div.a{margin-top:10px;font-size:15px;color:#3b4457;}\n<\/style>\n<div class=\"sdoc-tuto-wrap\">\n<p>Nmap, ou \u00ab Network Mapper \u00bb, est un outil open source incontournable pour cartographier un r\u00e9seau et en auditer la s\u00e9curit\u00e9. En 2026, il reste une r\u00e9f\u00e9rence pour les administrateurs syst\u00e8me et les \u00e9quipes cybers\u00e9curit\u00e9. Ce guide couvre l&rsquo;installation, le premier scan, les options qui comptent vraiment \u2014 et le cadre l\u00e9gal \u00e0 conna\u00eetre avant de lancer la moindre commande.<\/p>\n<div class=\"sdoc-tuto-open\">\n<span class=\"sdoc-tuto-kicker\">Ce qu&rsquo;il vous faut<\/span><\/p>\n<div class=\"sdoc-tuto-open-grid\">\n<div class=\"sdoc-tuto-open-item\"><span class=\"lbl\">Syst\u00e8me<\/span><span class=\"val\">Linux, Windows ou macOS<\/span><\/div>\n<div class=\"sdoc-tuto-open-item\"><span class=\"lbl\">Droits<\/span><span class=\"val\">Acc\u00e8s administrateur\/root pour les scans avanc\u00e9s<\/span><\/div>\n<div class=\"sdoc-tuto-open-item\"><span class=\"lbl\">Temps<\/span><span class=\"val\">10 minutes pour l&rsquo;installation et le premier scan<\/span><\/div>\n<div class=\"sdoc-tuto-open-item\"><span class=\"lbl\">Niveau<\/span><span class=\"val\">D\u00e9butant \u00e0 interm\u00e9diaire<\/span><\/div>\n<\/div>\n<div class=\"sdoc-tuto-steps\">\n<div class=\"step\"><span class=\"num\">1<\/span><span>Installer Nmap sur votre machine<\/span><\/div>\n<div class=\"step\"><span class=\"num\">2<\/span><span>Lancer un premier scan sur un h\u00f4te ou un r\u00e9seau que vous \u00eates autoris\u00e9 \u00e0 tester<\/span><\/div>\n<div class=\"step\"><span class=\"num\">3<\/span><span>Choisir la bonne option selon ce que vous cherchez \u00e0 r\u00e9v\u00e9ler<\/span><\/div>\n<div class=\"step\"><span class=\"num\">4<\/span><span>Aller plus loin avec le scripting NSE si besoin<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"sdoc-tuto-table-wrap\">\n<table class=\"sdoc-tuto-table\">\n<thead>\n<tr>\n<th>Objectif<\/th>\n<th>Commande<\/th>\n<th>Ce qu&rsquo;elle r\u00e9v\u00e8le<\/th>\n<th>Pr\u00e9caution<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Rep\u00e9rer les h\u00f4tes actifs<\/td>\n<td><code>nmap -sn 192.168.1.0\/24<\/code><\/td>\n<td>La liste des machines allum\u00e9es sur le r\u00e9seau, sans scanner leurs ports<\/td>\n<td>Toujours limit\u00e9 \u00e0 un p\u00e9rim\u00e8tre que vous poss\u00e9dez ou \u00eates autoris\u00e9 \u00e0 tester<\/td>\n<\/tr>\n<tr>\n<td>Lister les ports ouverts<\/td>\n<td><code>nmap 192.168.1.10<\/code><\/td>\n<td>Les ports TCP ouverts et les services associ\u00e9s, en scan par d\u00e9faut<\/td>\n<td>Peut \u00eatre journalis\u00e9 par un pare-feu ou un IDS c\u00f4t\u00e9 cible<\/td>\n<\/tr>\n<tr>\n<td>Scanner en SYN (stealth)<\/td>\n<td><code>nmap -sS 192.168.1.10<\/code><\/td>\n<td>Les ports ouverts via un scan TCP SYN, plus discret qu&rsquo;une connexion compl\u00e8te<\/td>\n<td>N\u00e9cessite les droits root\/administrateur<\/td>\n<\/tr>\n<tr>\n<td>Identifier les versions de service<\/td>\n<td><code>nmap -sV 192.168.1.10<\/code><\/td>\n<td>La nature et la version des logiciels qui \u00e9coutent sur chaque port<\/td>\n<td>Plus intrusif : envoie des sondes suppl\u00e9mentaires \u00e0 chaque port<\/td>\n<\/tr>\n<tr>\n<td>Estimer le syst\u00e8me d&rsquo;exploitation<\/td>\n<td><code>nmap -O 192.168.1.10<\/code><\/td>\n<td>Une estimation heuristique de l&rsquo;OS de la cible<\/td>\n<td>R\u00e9sultat probabiliste, jamais une certitude<\/td>\n<\/tr>\n<tr>\n<td>Auditer un p\u00e9rim\u00e8tre complet<\/td>\n<td><code>nmap -A 192.168.1.10<\/code><\/td>\n<td>OS, versions, scripts NSE par d\u00e9faut et traceroute en un seul passage<\/td>\n<td>Scan bruyant et d\u00e9taill\u00e9, \u00e0 r\u00e9server \u00e0 un p\u00e9rim\u00e8tre explicitement autoris\u00e9 par \u00e9crit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"sdoc-tuto-legal\">\n<span class=\"sdoc-tuto-kicker\">Cadre l\u00e9gal \u2014 \u00e0 lire avant de scanner<\/span><\/p>\n<div class=\"ttl\">Nmap est un outil l\u00e9gal. Scanner sans autorisation ne l&rsquo;est pas.<\/div>\n<ul>\n<li><strong>Usage l\u00e9gitime<\/strong> : votre propre r\u00e9seau, un p\u00e9rim\u00e8tre couvert par une autorisation \u00e9crite du propri\u00e9taire, ou un lab de test d\u00e9di\u00e9.<\/li>\n<li><strong>Rappel l\u00e9gal<\/strong> : acc\u00e9der ou se maintenir frauduleusement dans un syst\u00e8me de traitement automatis\u00e9 de donn\u00e9es est puni de 3 ans d&#8217;emprisonnement et 100 000 \u20ac d&rsquo;amende (Code p\u00e9nal, article 323-1), et jusqu&rsquo;\u00e0 5 ans \/ 150 000 \u20ac en cas d&rsquo;alt\u00e9ration du syst\u00e8me ou de ses donn\u00e9es (art. 323-2 et 323-3).<\/li>\n<li><strong>Pour s&rsquo;entra\u00eener sans r\u00e9seau \u00e0 soi<\/strong> : nmap.org cite lui-m\u00eame, dans sa documentation officielle, l&rsquo;h\u00f4te <span class=\"sdoc-tuto-mono\">scanme.nmap.org<\/span> comme exemple de cible de test.<\/li>\n<\/ul>\n<div class=\"foot\">Ceci n&rsquo;est pas un conseil juridique individualis\u00e9 : en cas de doute, demandez une autorisation \u00e9crite avant de scanner.<\/div>\n<\/div>\n<h2>Qu&rsquo;est-ce que Nmap ?<\/h2>\n<p>Nmap est un outil open source con\u00e7u pour d\u00e9couvrir des h\u00f4tes et des services sur un r\u00e9seau informatique. Il envoie des paquets IP pour d\u00e9terminer quels h\u00f4tes r\u00e9pondent, quels services ils exposent et quelles versions de logiciels tournent derri\u00e8re chaque port. Son usage va de l&rsquo;audit de s\u00e9curit\u00e9 \u00e0 la simple gestion d&rsquo;inventaire r\u00e9seau.<\/p>\n<h3>Caract\u00e9ristiques cl\u00e9s<\/h3>\n<div class=\"sdoc-tuto-cards\">\n<div class=\"sdoc-tuto-card\">\n<div class=\"h\">Scan de ports<\/div>\n<div class=\"txt\">Identifie les ports ouverts sur une machine cible.<\/div>\n<\/div>\n<div class=\"sdoc-tuto-card\">\n<div class=\"h\">D\u00e9tection de version<\/div>\n<div class=\"txt\">Remonte la version des services en cours d&rsquo;ex\u00e9cution (option <span class=\"sdoc-tuto-mono\">-sV<\/span>).<\/div>\n<\/div>\n<div class=\"sdoc-tuto-card\">\n<div class=\"h\">D\u00e9tection d&rsquo;OS<\/div>\n<div class=\"txt\">Estime le syst\u00e8me d&rsquo;exploitation de l&rsquo;h\u00f4te cible (option <span class=\"sdoc-tuto-mono\">-O<\/span>).<\/div>\n<\/div>\n<div class=\"sdoc-tuto-card\">\n<div class=\"h\">Scripting NSE<\/div>\n<div class=\"txt\">Automatise des v\u00e9rifications via des scripts \u00e9crits en Lua (option <span class=\"sdoc-tuto-mono\">&#8211;script<\/span>).<\/div>\n<\/div>\n<\/div>\n<h2>\u00c9tape 1 : installer Nmap<\/h2>\n<p>Pour installer Nmap sur une machine Linux (Debian\/Ubuntu), utilisez la commande suivante :<\/p>\n<pre><code class=\"language-bash\">sudo apt install nmap<\/code><\/pre>\n<p>Pour Windows, t\u00e9l\u00e9chargez le programme d&rsquo;installation depuis le site officiel de Nmap. macOS dispose \u00e9galement d&rsquo;un installeur officiel, ou peut passer par Homebrew.<\/p>\n<h2>\u00c9tape 2 : lancer votre premier scan<\/h2>\n<p>Un scan simple d&rsquo;un h\u00f4te donne la liste des ports ouverts et des services associ\u00e9s :<\/p>\n<pre><code class=\"language-bash\">nmap 192.168.1.1<\/code><\/pre>\n<p>Pour un scan plus complet, combinant d\u00e9tection d&rsquo;OS et de version, l&rsquo;option <span class=\"sdoc-tuto-mono\">-A<\/span> agr\u00e8ge plusieurs analyses en une seule commande :<\/p>\n<pre><code class=\"language-bash\">nmap -A 192.168.1.1<\/code><\/pre>\n<p>Cette derni\u00e8re commande est plus longue \u00e0 ex\u00e9cuter et plus visible sur le r\u00e9seau qu&rsquo;un scan simple \u2014 r\u00e9servez-la \u00e0 un p\u00e9rim\u00e8tre que vous savez autoris\u00e9.<\/p>\n<h2>\u00c9tape 3 : aller plus loin avec le scripting NSE<\/h2>\n<p>Le Nmap Scripting Engine (NSE) permet d&rsquo;automatiser des v\u00e9rifications suppl\u00e9mentaires via des scripts \u00e9crits en <strong>Lua<\/strong>, ex\u00e9cut\u00e9s en parall\u00e8le du scan. Chaque script d\u00e9crit sa fonction, ses cat\u00e9gories, puis une r\u00e8gle (<span class=\"sdoc-tuto-mono\">portrule<\/span> ou <span class=\"sdoc-tuto-mono\">hostrule<\/span>) qui d\u00e9termine quand il s&rsquo;applique, avant d&rsquo;ex\u00e9cuter son action :<\/p>\n<pre><code class=\"language-lua\">description = [[\n  D\u00e9crit ce que fait le script (affich\u00e9 par --script-help)\n]]\ncategories = {\"discovery\", \"safe\"}\nlocal shortport = require \"shortport\"\nportrule = shortport.port_or_service(80, \"http\")\naction = function(host, port)\n  -- code ex\u00e9cut\u00e9 quand la r\u00e8gle correspond \u00e0 la cible d\u00e9j\u00e0 scann\u00e9e\nend<\/code><\/pre>\n<p>Cette architecture rend Nmap extensible : la commande <span class=\"sdoc-tuto-mono\">-sC<\/span> lance les scripts de la cat\u00e9gorie \u00ab default \u00bb, et <span class=\"sdoc-tuto-mono\">&#8211;script=&lt;nom&gt;<\/span> cible un script pr\u00e9cis.<\/p>\n<h2>Erreurs \u00e0 \u00e9viter<\/h2>\n<div class=\"sdoc-tuto-checklist\">\n<div class=\"sdoc-tuto-checkbox ok\">\n<div class=\"h\">\u00c0 faire<\/div>\n<ul>\n<li>Obtenir une autorisation \u00e9crite avant de scanner un p\u00e9rim\u00e8tre qui n&rsquo;est pas le v\u00f4tre.<\/li>\n<li>Commencer par un scan simple avant de passer \u00e0 <span class=\"sdoc-tuto-mono\">-A<\/span> ou <span class=\"sdoc-tuto-mono\">-sV<\/span>.<\/li>\n<li>Garder Nmap \u00e0 jour (<span class=\"sdoc-tuto-mono\">sudo apt update &amp;&amp; sudo apt upgrade nmap<\/span>) pour b\u00e9n\u00e9ficier des correctifs et nouvelles signatures.<\/li>\n<\/ul>\n<\/div>\n<div class=\"sdoc-tuto-checkbox ko\">\n<div class=\"h\">\u00c0 \u00e9viter<\/div>\n<ul>\n<li>Lancer un scan agressif (<span class=\"sdoc-tuto-mono\">-A<\/span>) sur un r\u00e9seau sans autorisation pr\u00e9alable.<\/li>\n<li>Traiter une d\u00e9tection d&rsquo;OS comme une certitude : c&rsquo;est une estimation heuristique.<\/li>\n<li>Confondre un port \u00ab filtered \u00bb (pare-feu silencieux) avec un port ferm\u00e9.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"sdoc-tuto-retain\">\n<div class=\"h\">\u00c0 retenir<\/div>\n<ul>\n<li>Nmap cartographie un r\u00e9seau et ses services ; l&rsquo;outil est l\u00e9gal, l&rsquo;usage sans autorisation ne l&rsquo;est pas.<\/li>\n<li><span class=\"sdoc-tuto-mono\">-sS<\/span>, <span class=\"sdoc-tuto-mono\">-sV<\/span>, <span class=\"sdoc-tuto-mono\">-O<\/span> et <span class=\"sdoc-tuto-mono\">-A<\/span> r\u00e9pondent chacun \u00e0 un objectif diff\u00e9rent \u2014 voir le tableau en t\u00eate d&rsquo;article.<\/li>\n<li>Commencez toujours par un scan simple sur un p\u00e9rim\u00e8tre que vous ma\u00eetrisez.<\/li>\n<li>Le scripting NSE (Lua) \u00e9tend Nmap, mais reste soumis aux m\u00eames r\u00e8gles d&rsquo;autorisation.<\/li>\n<\/ul>\n<\/div>\n<h2>Pour aller plus loin sur scan-doc.fr<\/h2>\n<div class=\"sdoc-tuto-morelinks\">\n<a href=\"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/nmap\/\"><span class=\"arw\">\u2192<\/span> Nmap dans une strat\u00e9gie de s\u00e9curit\u00e9 r\u00e9seau (approche plus large que ce guide de prise en main)<\/a><br \/>\n<a href=\"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/nmap-nmap\/\"><span class=\"arw\">\u2192<\/span> Panorama des types de scans Nmap et de ses alternatives<\/a><br \/>\n<a href=\"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/open-vas\/\"><span class=\"arw\">\u2192<\/span> OpenVAS, un scanner de vuln\u00e9rabilit\u00e9s compl\u00e9mentaire \u00e0 Nmap<\/a>\n<\/div>\n<h2>Ressources officielles<\/h2>\n<ul>\n<li><a href=\"https:\/\/nmap.org\/docs.html\" rel=\"noopener nofollow\">Documentation officielle de Nmap<\/a><\/li>\n<li><a href=\"https:\/\/nmap.org\/mailinglist.html\" rel=\"noopener nofollow\">Forum communautaire<\/a><\/li>\n<\/ul>\n<h2>FAQ<\/h2>\n<details>\n<summary>Qu&rsquo;est-ce que Nmapfe ?<\/summary>\n<div class=\"a\">Nmapfe (NmapFE) \u00e9tait l&rsquo;ancienne interface graphique de Nmap. Elle a depuis \u00e9t\u00e9 remplac\u00e9e par Zenmap, l&rsquo;interface graphique officielle actuelle, pour ceux qui pr\u00e9f\u00e8rent ne pas travailler en ligne de commande.<\/div>\n<\/details>\n<details>\n<summary>Comment interpr\u00e9ter les r\u00e9sultats d&rsquo;un scan Nmap ?<\/summary>\n<div class=\"a\">Les r\u00e9sultats indiquent l&rsquo;\u00e9tat de chaque port scann\u00e9 (ouvert, ferm\u00e9 ou filtr\u00e9) et le service associ\u00e9, avec parfois la version du logiciel d\u00e9tect\u00e9 selon les options utilis\u00e9es.<\/div>\n<\/details>\n<details>\n<summary>Est-il l\u00e9gal d&rsquo;utiliser Nmap ?<\/summary>\n<div class=\"a\">L&rsquo;outil lui-m\u00eame est parfaitement l\u00e9gal. Ce qui est encadr\u00e9, c&rsquo;est son usage : scanner un r\u00e9seau dont vous \u00eates propri\u00e9taire, ou pour lequel vous avez une autorisation \u00e9crite explicite, est l\u00e9gal. Scanner un syst\u00e8me tiers sans autorisation rel\u00e8ve de l&rsquo;acc\u00e8s et du maintien frauduleux dans un syst\u00e8me de traitement automatis\u00e9 de donn\u00e9es (Code p\u00e9nal, art. 323-1 et suivants), passible de peines d&#8217;emprisonnement et d&rsquo;amende.<\/div>\n<\/details>\n<details>\n<summary>Quels syst\u00e8mes d&rsquo;exploitation prennent en charge Nmap ?<\/summary>\n<div class=\"a\">Nmap fonctionne sur Linux, Windows et macOS.<\/div>\n<\/details>\n<details>\n<summary>Comment mettre \u00e0 jour Nmap ?<\/summary>\n<div class=\"a\">Sur Linux, utilisez votre gestionnaire de paquets habituel (par exemple <span class=\"sdoc-tuto-mono\">sudo apt update &amp;&amp; sudo apt upgrade nmap<\/span>). Sur Windows et macOS, t\u00e9l\u00e9chargez la derni\u00e8re version depuis le site officiel.<\/div>\n<\/details>\n<details>\n<summary>Quelle est la diff\u00e9rence entre ce guide et les autres articles Nmap du site ?<\/summary>\n<div class=\"a\">Ce guide est centr\u00e9 sur la prise en main : installation, premier scan et lecture des r\u00e9sultats. Pour une approche orient\u00e9e strat\u00e9gie de s\u00e9curit\u00e9 r\u00e9seau, consultez <a href=\"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/nmap\/\">notre article d\u00e9di\u00e9<\/a> ; pour un panorama des types de scans et des alternatives \u00e0 Nmap, consultez <a href=\"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/nmap-nmap\/\">ce comparatif<\/a>.<\/div>\n<\/details>\n<hr>\n<div class=\"articles-lies\">\n<h3>\u00c0 lire aussi<\/h3>\n<ul>\n<li><a href=\"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/network-scanner\/\">Network Scanner : Top 5 Outils de Scan R\u00e9seau<\/a><\/li>\n<li><a href=\"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/ip-scan\/\">IP Scan : Top 5 outils gratuits 2026<\/a><\/li>\n<li><a href=\"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/ipscanner\/\">IP Scanner : Outils R\u00e9seau &#8211; Top 10 Gratuits<\/a><\/li>\n<li><a href=\"https:\/\/scan-doc.fr\/blog\/scan-reseau-securite\/ip-scanner\/\">IP Scanner : Top 8 Outils R\u00e9seau 2026<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":34,"featured_media":999999999,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"manual_indexmenow":false,"indexmenow_id_project":0,"footnotes":""},"categories":[4679],"tags":[4686,4685,3170,2191],"class_list":["post-8010","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scan-reseau-securite","tag-nmap","tag-scan-reseau","tag-securite","tag-securite-des-donnees","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-25"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.3 (Yoast SEO v26.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Nmap : Guide Scan R\u00e9seau Complet 2026<\/title>\n<meta name=\"description\" content=\"Nmap : installation, premier scan, options -sS\/-sV\/-O\/-A expliqu\u00e9es et le cadre l\u00e9gal (Code p\u00e9nal) avant de scanner un r\u00e9seau. 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