{"id":47586,"date":"2026-04-01T13:05:00","date_gmt":"2026-04-01T13:05:00","guid":{"rendered":"\/fr\/tutoriels\/?p=47586"},"modified":"2026-04-01T11:05:43","modified_gmt":"2026-04-01T11:05:43","slug":"commande-netstat","status":"publish","type":"post","link":"\/fr\/tutoriels\/commande-netstat\/","title":{"rendered":"La commande netstat sous Linux"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>netstat<\/strong> (abr&eacute;viation de &laquo; <strong>network statistics<\/strong> &raquo;) est un outil en ligne de commande pour surveiller les connexions r&eacute;seau, diagnostiquer des probl&egrave;mes et collecter des donn&eacute;es importantes li&eacute;es au r&eacute;seau. Disponible sur Linux, Windows et macOS, il fournit des informations en temps r&eacute;el sur les connexions TCP et UDP actives, les ports &agrave; l&rsquo;&eacute;coute, les tables de routage et les interfaces r&eacute;seau.<\/p><p class=\"wp-block-paragraph\">Bien que les distributions Linux modernes soient pass&eacute;es &agrave; <strong>ss<\/strong> (socket statistics) en raison de ses meilleures performances et de sa sortie plus d&eacute;taill&eacute;e, <strong>netstat<\/strong> reste utile pour le d&eacute;pannage des probl&egrave;mes r&eacute;seau et l&rsquo;analyse de s&eacute;curit&eacute;.<\/p><p class=\"wp-block-paragraph\">Dans cet article, nous aborderons tout ce que vous devez savoir sur la commande <strong>netstat<\/strong> sous Linux, de la syntaxe et des options &agrave; des exemples pratiques. &Agrave; la fin de ce guide, vous saurez utiliser <strong>netstat<\/strong> efficacement pour g&eacute;rer l&rsquo;activit&eacute; r&eacute;seau sur votre syst&egrave;me.<\/p><h2 class=\"wp-block-heading\" id=\"h-netstat-command-syntax\"><strong>syntaxe de la commande netstat<\/strong> <\/h2><p class=\"wp-block-paragraph\">La syntaxe de base de la commande <strong>netstat<\/strong> est :<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat [options]<\/pre><p class=\"wp-block-paragraph\">L&rsquo;ex&eacute;cution de <strong>netstat<\/strong> sans options affichera une liste des connexions r&eacute;seau actives et des statistiques de sockets comme ceci :<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6020bff4\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6020bff4\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"305\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-netstat-du-terminal.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat affiche les connexions Internet actives et les sockets de domaine UNIX\" class=\"wp-image-47545\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-netstat-du-terminal.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-netstat-du-terminal.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-netstat-du-terminal.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-netstat-du-terminal.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><p class=\"wp-block-paragraph\">La premi&egrave;re section de la sortie affiche les connexions actives avec six colonnes :<\/p><ul class=\"wp-block-list\">\n<li><strong>Proto<\/strong> &ndash; affiche le protocole utilis&eacute; (TCP ou UDP).<\/li>\n\n\n\n<li><strong>Recv-Q<\/strong> &ndash; indique le nombre d&rsquo;octets re&ccedil;us en attente de traitement.<\/li>\n\n\n\n<li><strong>Send-Q<\/strong> &ndash; indique le nombre d&rsquo;octets dans la file d&rsquo;envoi en attente de transmission.<\/li>\n\n\n\n<li><strong>Adresse locale<\/strong> &ndash; affiche l&rsquo;adresse IP et le num&eacute;ro de port de la machine.<\/li>\n\n\n\n<li><strong>Adresse distante<\/strong> &ndash; affiche l&rsquo;adresse IP et le num&eacute;ro de port du syst&egrave;me distant connect&eacute; &agrave; la machine.<\/li>\n\n\n\n<li><strong>&Eacute;tat<\/strong> &ndash; indique l&rsquo;&eacute;tat de la connexion, comme <strong>LISTEN<\/strong>, <strong>ESTABLISHED<\/strong> ou <strong>TIME_WAIT<\/strong>.<\/li>\n<\/ul><p class=\"wp-block-paragraph\">Par ailleurs, vous verrez des statistiques du domaine UNIX dans la deuxi&egrave;me section, qui incluent :<\/p><ul class=\"wp-block-list\">\n<li><strong>Proto<\/strong> &ndash; indique le protocole utilis&eacute;.<\/li>\n\n\n\n<li><strong>RefCnt<\/strong> &ndash; affiche le compteur de r&eacute;f&eacute;rences du socket.<\/li>\n\n\n\n<li><strong>Drapeaux<\/strong> &ndash; affiche les drapeaux du socket, tels que <strong>ACC<\/strong> (acceptation) ou <strong>W<\/strong> (&eacute;criture possible).<\/li>\n\n\n\n<li><strong>Type<\/strong> &ndash; indique le type de socket, tels que <strong>STREAM<\/strong>, <strong>DGRAM<\/strong> ou <strong>SEQPACKET<\/strong>.<\/li>\n\n\n\n<li><strong>&Eacute;tat<\/strong> &ndash; affiche l&rsquo;&eacute;tat actuel du socket.<\/li>\n\n\n\n<li><strong>I-Node<\/strong> &ndash; repr&eacute;sente le num&eacute;ro d&rsquo;inode associ&eacute; au socket.<\/li>\n\n\n\n<li><strong>Path<\/strong> &ndash; affiche le chemin du syst&egrave;me de fichiers pour le socket, le cas &eacute;ch&eacute;ant.<\/li>\n<\/ul><h2 class=\"wp-block-heading\" id=\"h-netstat-command-options\"><strong>options de la commande netstat<\/strong> <\/h2><p class=\"wp-block-paragraph\">Comme la plupart des <a href=\"\/fr\/tutoriels\/commandes-linux\/\">commandes Linux<\/a>, <strong>netstat<\/strong> propose plusieurs options pour personnaliser sa sortie. Voici quelques-unes des options les plus couramment utilis&eacute;es :<\/p><figure tabindex=\"0\" class=\"wp-block-table\"><table><tbody><tr><td><strong>Option<\/strong> <\/td><td><strong>Description.<\/strong> <\/td><\/tr><tr><td><strong>-a<\/strong> <\/td><td>Affiche toutes les connexions actives, y compris les sockets en &eacute;coute et non en &eacute;coute.<\/td><\/tr><tr><td><strong>-l<\/strong> <\/td><td>R&eacute;pertorie uniquement les sockets &agrave; l&rsquo;&eacute;coute.<\/td><\/tr><tr><td><strong>-t<\/strong> <\/td><td>Affiche uniquement les connexions TCP.<\/td><\/tr><tr><td><strong>-u<\/strong> <\/td><td>Affiche uniquement les connexions UDP.<\/td><\/tr><tr><td><strong>-r<\/strong> <\/td><td>Affiche la table de routage du syst&egrave;me.<\/td><\/tr><tr><td><strong>p {<\/strong> <\/td><td>Affiche l&rsquo;identifiant de processus (PID) et le nom du programme associ&eacute;s &agrave; chaque connexion.<\/td><\/tr><tr><td><strong>-n<\/strong> <\/td><td>Affiche des adresses num&eacute;riques au lieu de r&eacute;soudre les noms d&rsquo;h&ocirc;te.<\/td><\/tr><tr><td><strong>-s<\/strong> <\/td><td>Affiche les statistiques des protocoles pour TCP, UDP et les autres protocoles pris en charge.<\/td><\/tr><tr><td><strong>-i<\/strong> <\/td><td>R&eacute;pertorie les interfaces r&eacute;seau et leurs statistiques.<\/td><\/tr><tr><td><strong>&ndash;version<\/strong> <\/td><td>V&eacute;rifie la version de <strong>netstat<\/strong> install&eacute;e sur le syst&egrave;me.<\/td><\/tr><\/tbody><\/table><\/figure><p class=\"wp-block-paragraph\">Vous pouvez &eacute;galement combiner plusieurs options pour filtrer des d&eacute;tails sp&eacute;cifiques. Par exemple, pour lister toutes les connexions TCP et UDP &agrave; l&rsquo;&eacute;coute avec des adresses num&eacute;riques et les processus associ&eacute;s, tapez :<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -tunlp<\/pre><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6020cc1a\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6020cc1a\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"410\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunlp-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -tunlp affiche toutes les connexions TCP et UDP &agrave; l&rsquo;&eacute;coute avec des adresses num&eacute;riques et les processus associ&eacute;s\" class=\"wp-image-47548\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunlp-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunlp-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunlp-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunlp-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><h2 class=\"wp-block-heading\" id=\"h-netstat-command-examples\"><strong>Exemples de la commande netstat<\/strong> <\/h2><p class=\"wp-block-paragraph\">Contrairement &agrave; d&rsquo;autres outils de surveillance du r&eacute;seau comme telnet, que vous devez installer manuellement sous Linux, <strong>netstat<\/strong> est pr&eacute;install&eacute; sur de nombreuses distributions, ce qui vous permet de commencer &agrave; ex&eacute;cuter des commandes imm&eacute;diatement dans le terminal.<\/p><p class=\"wp-block-paragraph\">Si vous souhaitez utiliser <strong>netstat<\/strong> sur votre serveur priv&eacute; virtuel (VPS) Linux, assurez-vous de disposer d&rsquo;un acc&egrave;s SSH &agrave; votre serveur. Les clients <a href=\"\/fr\/vps-hosting\">VPS de Hostinger<\/a> peuvent trouver leurs identifiants SSH dans hPanel en allant &agrave; <strong>VPS<\/strong> &rarr; <strong>G&eacute;rer<\/strong> &rarr; <strong>Aper&ccedil;u<\/strong>, puis en trouvant la section <strong>Informations du VPS<\/strong>.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6020d4bb\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6020d4bb\" class=\"aligncenter size-large is-resized wp-lightbox-container\"><img decoding=\"async\" width=\"1064\" height=\"342\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2024\/07\/informations-vps-actualise-04-23-2025_05_19_PM-04-23-2025_06_52_PM.png\/w=1024,h=1024,fit=scale-down\" alt=\"\" class=\"wp-image-39987\" style=\"width:840px;height:auto\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2024\/07\/informations-vps-actualise-04-23-2025_05_19_PM-04-23-2025_06_52_PM.png\/w=1064,fit=scale-down 1064w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2024\/07\/informations-vps-actualise-04-23-2025_05_19_PM-04-23-2025_06_52_PM.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2024\/07\/informations-vps-actualise-04-23-2025_05_19_PM-04-23-2025_06_52_PM.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2024\/07\/informations-vps-actualise-04-23-2025_05_19_PM-04-23-2025_06_52_PM.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2024\/07\/informations-vps-actualise-04-23-2025_05_19_PM-04-23-2025_06_52_PM.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1064px) 100vw, 1064px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Nous proposons &eacute;galement une fonctionnalit&eacute; de <strong>terminal dans le navigateur<\/strong> pour ex&eacute;cuter des commandes directement dans un onglet du navigateur, sans logiciel de terminal suppl&eacute;mentaire. Pour acc&eacute;der &agrave; cette fonctionnalit&eacute;, cliquez sur le bouton dans le coin sup&eacute;rieur droit du tableau de bord de votre VPS.<\/p><p class=\"wp-block-paragraph\">En outre, <strong>Kodee AI Assistant<\/strong> peut aider pour toutes les questions li&eacute;es au VPS, fournir des instructions adapt&eacute;es &agrave; la configuration de votre serveur et diagnostiquer ou d&eacute;panner les probl&egrave;mes de serveur. S&eacute;lectionnez-le simplement dans la barre lat&eacute;rale gauche du tableau de bord de votre VPS, saisissez votre requ&ecirc;te et Kodee vous fournira l&rsquo;assistance dont vous avez besoin.<\/p><figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.hostinger.com\/fr\/vps\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"1024\" height=\"300\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2022\/12\/FR-VPS-hosting_in-text-banner-1024x300-1.png\/public\" alt=\"\" class=\"wp-image-41471\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2022\/12\/FR-VPS-hosting_in-text-banner-1024x300-1.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2022\/12\/FR-VPS-hosting_in-text-banner-1024x300-1.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2022\/12\/FR-VPS-hosting_in-text-banner-1024x300-1.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2022\/12\/FR-VPS-hosting_in-text-banner-1024x300-1.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><h3 class=\"wp-block-heading\" id=\"h-view-all-active-connections\"><strong>Afficher toutes les connexions actives<\/strong> <\/h3><p class=\"wp-block-paragraph\">La commande <strong>netstat -a<\/strong> affiche toutes les connexions r&eacute;seau actives, y compris les sockets &agrave; l&rsquo;&eacute;coute et non &agrave; l&rsquo;&eacute;coute. Il aide &agrave; diagnostiquer l&rsquo;activit&eacute; r&eacute;seau, les ports ouverts et les risques potentiels de s&eacute;curit&eacute; en identifiant les connexions inattendues.<\/p><p class=\"wp-block-paragraph\">Ex&eacute;cutez la commande suivante :<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -a<\/pre><p class=\"wp-block-paragraph\">Par exemple, si l&rsquo;&eacute;tat d&rsquo;une connexion est <strong>ESTABLISHED<\/strong>, cela signifie qu&rsquo;il existe une communication bidirectionnelle active entre votre machine et un syst&egrave;me distant. Si l&rsquo;&eacute;tat est <strong>LISTEN<\/strong>, le port est ouvert et en attente de connexions entrantes.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6020e4bf\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6020e4bf\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"698\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-a.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -a affiche toutes les connexions actives, y compris les ports en &eacute;coute et non en &eacute;coute.\" class=\"wp-image-47552\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-a.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-a.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-a.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-a.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><h3 class=\"wp-block-heading\" id=\"h-check-tcp-connections\"><strong>V&eacute;rifiez les connexions TCP<\/strong> <\/h3><p class=\"wp-block-paragraph\">Si vous souhaitez afficher uniquement les connexions actives du protocole de contr&ocirc;le de transmission (TCP), utilisez <strong>netstat<\/strong> avec les options <strong>-a <\/strong>et <strong>-t<\/strong>. Cela vous permet d&rsquo;identifier rapidement les probl&egrave;mes affectant les services bas&eacute;s sur TCP, tels que les serveurs web, SSH et les connexions aux bases de donn&eacute;es.<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -at<\/pre><p class=\"wp-block-paragraph\">Si vous constatez de nombreuses connexions <strong>ESTABLISHED<\/strong>, cela peut indiquer une charge &eacute;lev&eacute;e sur un service sp&eacute;cifique ou une attaque en cours. Par ailleurs, la pr&eacute;sence de multiples &eacute;tats <strong>TIME_WAIT<\/strong> ou <strong>CLOSE_WAIT<\/strong> indique que le serveur peine &agrave; fermer correctement les connexions, ce qui peut entra&icirc;ner un &eacute;puisement des ressources.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6020ec25\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6020ec25\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"421\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-at-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -at affiche les connexions TCP actives.\" class=\"wp-image-47554\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-at-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-at-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-at-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-at-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><h3 class=\"wp-block-heading\" id=\"h-list-all-udp-connections\"><strong>Lister toutes les connexions UDP<\/strong> <\/h3><p class=\"wp-block-paragraph\">La surveillance des connexions User Datagram Protocol (UDP) permet d&rsquo;identifier les pertes de paquets, une latence &eacute;lev&eacute;e ou un trafic inattendu. Pour filtrer la sortie et n&rsquo;afficher que les activit&eacute;s r&eacute;seau bas&eacute;es sur UDP, y compris les ports UDP ouverts et connect&eacute;s, utilisez cette commande :<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -au<\/pre><p class=\"wp-block-paragraph\">Comme UDP est un protocole sans connexion, la sortie n&rsquo;inclut pas de valeurs dans la colonne <strong>State<\/strong>, contrairement &agrave; l&rsquo;exemple pr&eacute;c&eacute;dent qui affiche les connexions TCP actives.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6020f2bb\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6020f2bb\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"228\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-au-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -au affiche les connexions UDP actives\" class=\"wp-image-47556\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-au-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-au-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-au-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-au-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><p>\n\n        <div class=\"protip\">\n            <div class=\"protip__heading\">\n                <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                    <path d=\"M1.49234 23.5024C1.23229 23.5024 0.972242 23.4024 0.782206 23.2123C0.562165 22.9923 0.452144 22.6822 0.502153 22.3722C0.562165 21.9221 1.14227 17.9113 3.00262 16.351C3.63274 15.8209 4.43289 15.5509 5.26305 15.5609C6.09321 15.5909 6.87335 15.9109 7.47347 16.4911C8.6937 17.6913 8.76371 19.6717 7.6435 20.9919C6.0832 22.8523 2.08245 23.4324 1.63237 23.4924C1.59236 23.4924 1.54235 23.4924 1.50234 23.4924L1.49234 23.5024ZM5.16303 17.5613C4.84297 17.5613 4.53291 17.6713 4.29287 17.8813C3.60274 18.4614 3.07264 19.9317 2.75258 21.242C4.06282 20.9219 5.5331 20.3918 6.11321 19.7017C6.55329 19.1716 6.54329 18.3814 6.0832 17.9213C5.85316 17.7013 5.5431 17.5713 5.20304 17.5613C5.19304 17.5613 5.17303 17.5613 5.16303 17.5613ZM11.7243 21.8821C11.4942 21.8821 11.2642 21.8021 11.0841 21.652C10.8541 21.462 10.7241 21.1819 10.7241 20.8819V15.9109L8.08358 13.2705H3.11264C2.81259 13.2705 2.53254 13.1404 2.3425 12.9104C2.15246 12.6803 2.07245 12.3803 2.12246 12.0902C2.19247 11.7102 2.84259 8.36953 4.70294 7.12929C6.33325 6.04909 8.96375 6.49918 10.244 6.80923C11.5442 4.96889 13.2546 3.4286 15.2349 2.33839C17.4553 1.11816 19.9858 0.518051 22.4963 0.498047C23.0464 0.498047 23.4865 0.948132 23.4865 1.49824C23.4865 5.0389 22.3763 9.97983 17.1753 13.7605C17.4853 15.0408 17.9354 17.6613 16.8552 19.2816C15.615 21.1419 12.2744 21.7921 11.8943 21.8621C11.8343 21.8721 11.7743 21.8821 11.7143 21.8821H11.7243ZM12.7245 16.181V19.6016C13.7146 19.2916 14.7948 18.7915 15.2049 18.1814C15.675 17.4812 15.605 16.091 15.385 14.9008C14.5248 15.3808 13.6346 15.8109 12.7245 16.181ZM9.66388 12.0302L11.9643 14.3307C13.1845 13.8306 14.3648 13.2204 15.485 12.5103C19.9358 9.51974 21.2361 5.60901 21.4561 2.53843C19.6157 2.67846 17.8254 3.20856 16.2051 4.09872C14.2847 5.14892 12.6544 6.68921 11.4942 8.54956C10.7841 9.65977 10.174 10.82 9.66388 12.0302ZM4.39289 11.2701H7.81353C8.1936 10.3599 8.63368 9.46974 9.11377 8.60957C7.92355 8.38953 6.51329 8.31952 5.81315 8.78961C5.19304 9.19968 4.70294 10.3099 4.39289 11.2701Z\" fill=\"#673DE6\"\/>\n                <\/svg>\n                <p class=\"protip__title\">\n                    La diff&eacute;rence entre TCP et UDP                <\/p>\n            <\/div>\n            <p class=\"protip__content\"> TCP &eacute;tablit une connexion avant de transmettre des donn&eacute;es afin d&rsquo;assurer une communication fiable et sans erreur, ce qui est id&eacute;al pour la navigation web, les transferts de fichiers et le courrier &eacute;lectronique. En revanche, UDP envoie des paquets sans n&eacute;cessiter de handshake, ce qui le rend plus rapide mais moins fiable, ce qui convient aux applications &agrave; faible latence comme les requ&ecirc;tes DNS et la VoIP.<\/p>\n                    <\/div>\n        \n\n\n\n<\/p><h3 class=\"wp-block-heading\" id=\"h-show-numerical-addresses\"><strong>Afficher les adresses num&eacute;riques<\/strong> <\/h3><p class=\"wp-block-paragraph\">Par d&eacute;faut, <strong>netstat<\/strong> r&eacute;sout les noms d&rsquo;h&ocirc;te en noms de domaine lisibles par l&rsquo;humain, ce qui peut ralentir l&rsquo;ex&eacute;cution de la commande sur des r&eacute;seaux comportant de nombreuses connexions. Pour d&eacute;sactiver la r&eacute;solution des noms d&rsquo;h&ocirc;te et afficher des adresses IP num&eacute;riques, ajoutez l&rsquo;option <strong>-n<\/strong> :<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -n<\/pre><p class=\"wp-block-paragraph\">Lorsqu&rsquo;il est ex&eacute;cut&eacute;, <strong>netstat<\/strong> affiche les connexions sous forme num&eacute;rique, par exemple <strong>192.168.1.100 :443<\/strong> au lieu de <strong>example.tld :443<\/strong>. Cela est utile lors de l&rsquo;analyse des adresses locales et &eacute;trang&egrave;res dans les connexions actives, car cela offre une vue plus rapide et plus claire de l&rsquo;activit&eacute; r&eacute;seau.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6020fa9b\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6020fa9b\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"463\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-n.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -n affiche les connexions sous forme num&eacute;rique.\" class=\"wp-image-47558\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-n.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-n.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-n.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-sortie-de-netstat-n.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><h3 class=\"wp-block-heading\" id=\"h-display-listening-ports\"><strong>Afficher les ports &agrave; l&rsquo;&eacute;coute<\/strong> <\/h3><p class=\"wp-block-paragraph\">Vous pouvez identifier les services qui &eacute;coutent activement les connexions entrantes sur tous les ports ouverts en ex&eacute;cutant :<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -l<\/pre><p class=\"wp-block-paragraph\">La sortie affiche uniquement les sockets dans l&rsquo;&eacute;tat <strong>LISTEN<\/strong>, ce qui signifie qu&rsquo;ils attendent activement des connexions entrantes.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc60210210\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc60210210\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"641\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-l-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -l affiche les sockets &agrave; l&rsquo;&eacute;tat LISTEN.\" class=\"wp-image-47560\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-l-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-l-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-l-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-l-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Pour des r&eacute;sultats davantage filtr&eacute;s, combinez l&rsquo;option <strong>-l <\/strong>avec <strong>-t<\/strong> pour TCP ou <strong>-u<\/strong> pour des connexions UDP uniquement :<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -lt # Afficher uniquement les ports TCP en &eacute;coute<\/pre><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -lu # Afficher uniquement les ports UDP en &eacute;coute<\/pre><h3 class=\"wp-block-heading\" id=\"h-analyze-routing-tables\"><strong>Analysez les tables de routage<\/strong> <\/h3><p class=\"wp-block-paragraph\">La commande <strong>netstat -r<\/strong> examine la fa&ccedil;on dont votre syst&egrave;me achemine le trafic r&eacute;seau.<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -r<\/pre><p class=\"wp-block-paragraph\">Il fournit des d&eacute;tails tels que les r&eacute;seaux de destination, les passerelles et les informations d&rsquo;interface.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc60210a63\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc60210a63\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"158\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-r-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -r affiche une table de routage IP.\" class=\"wp-image-47562\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-r-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-r-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-r-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-r-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Voici ce que repr&eacute;sente chaque colonne dans la sortie :<\/p><ul class=\"wp-block-list\">\n<li><strong>Destination<\/strong> &ndash; le r&eacute;seau cible ou l&rsquo;adresse IP.<\/li>\n\n\n\n<li><strong>Passerelle<\/strong> &ndash; le prochain saut pour atteindre la destination.<\/li>\n\n\n\n<li><strong>Genmask<\/strong> &ndash; le masque de sous-r&eacute;seau d&eacute;finissant la plage du r&eacute;seau.<\/li>\n\n\n\n<li><strong>Drapeaux<\/strong> &ndash; indicateurs tels que <strong>UG<\/strong> (actif, passerelle) ou <strong>U<\/strong> (actif, route directe).<\/li>\n\n\n\n<li><strong>MSS <\/strong> &ndash; la taille maximale de segment (MSS) pour les connexions TCP sur la route.<\/li>\n\n\n\n<li><strong>Fen&ecirc;tre <\/strong> &ndash; la taille maximale de la fen&ecirc;tre TCP pour la route.<\/li>\n\n\n\n<li><strong>irtt <\/strong> &ndash; le temps aller-retour initial (RTT) pour les connexions TCP, mesur&eacute; en millisecondes.<\/li>\n\n\n\n<li><strong>Iface<\/strong> &ndash; l&rsquo;interface r&eacute;seau qui g&egrave;re la route.<\/li>\n<\/ul><h3 class=\"wp-block-heading\" id=\"h-identify-protocol-statistics\"><strong>Identifier les statistiques de protocole<\/strong> <\/h3><p class=\"wp-block-paragraph\">En utilisant <strong>netstat<\/strong> avec l&rsquo;option <strong>-s<\/strong>, vous pouvez obtenir des statistiques d&eacute;taill&eacute;es pour diff&eacute;rents protocoles r&eacute;seau, notamment TCP, UDP, ICMP et IP. Cela est utile pour identifier la perte de paquets, les erreurs de transmission et les connexions interrompues.<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -s<\/pre><p class=\"wp-block-paragraph\">La sortie organise les statistiques par protocole. Par exemple, les statistiques TCP incluent des valeurs pour les connexions actives, les retransmissions et les paquets abandonn&eacute;s, tandis que les statistiques UDP fournissent des d&eacute;tails sur les datagrammes re&ccedil;us, envoy&eacute;s ou &eacute;cart&eacute;s.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc602112a7\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc602112a7\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"784\" height=\"1024\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-de-netstat-s-dans-le-terminal.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -s affiche des statistiques pour diff&eacute;rents protocoles\" class=\"wp-image-47564\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-de-netstat-s-dans-le-terminal.png\/w=784,fit=scale-down 784w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-de-netstat-s-dans-le-terminal.png\/w=230,fit=scale-down 230w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-de-netstat-s-dans-le-terminal.png\/w=115,fit=scale-down 115w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/sortie-de-netstat-s-dans-le-terminal.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 784px) 100vw, 784px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><p>        <div class=\"protip\">\n            <div class=\"protip__heading\">\n                <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                    <path d=\"M1.49234 23.5024C1.23229 23.5024 0.972242 23.4024 0.782206 23.2123C0.562165 22.9923 0.452144 22.6822 0.502153 22.3722C0.562165 21.9221 1.14227 17.9113 3.00262 16.351C3.63274 15.8209 4.43289 15.5509 5.26305 15.5609C6.09321 15.5909 6.87335 15.9109 7.47347 16.4911C8.6937 17.6913 8.76371 19.6717 7.6435 20.9919C6.0832 22.8523 2.08245 23.4324 1.63237 23.4924C1.59236 23.4924 1.54235 23.4924 1.50234 23.4924L1.49234 23.5024ZM5.16303 17.5613C4.84297 17.5613 4.53291 17.6713 4.29287 17.8813C3.60274 18.4614 3.07264 19.9317 2.75258 21.242C4.06282 20.9219 5.5331 20.3918 6.11321 19.7017C6.55329 19.1716 6.54329 18.3814 6.0832 17.9213C5.85316 17.7013 5.5431 17.5713 5.20304 17.5613C5.19304 17.5613 5.17303 17.5613 5.16303 17.5613ZM11.7243 21.8821C11.4942 21.8821 11.2642 21.8021 11.0841 21.652C10.8541 21.462 10.7241 21.1819 10.7241 20.8819V15.9109L8.08358 13.2705H3.11264C2.81259 13.2705 2.53254 13.1404 2.3425 12.9104C2.15246 12.6803 2.07245 12.3803 2.12246 12.0902C2.19247 11.7102 2.84259 8.36953 4.70294 7.12929C6.33325 6.04909 8.96375 6.49918 10.244 6.80923C11.5442 4.96889 13.2546 3.4286 15.2349 2.33839C17.4553 1.11816 19.9858 0.518051 22.4963 0.498047C23.0464 0.498047 23.4865 0.948132 23.4865 1.49824C23.4865 5.0389 22.3763 9.97983 17.1753 13.7605C17.4853 15.0408 17.9354 17.6613 16.8552 19.2816C15.615 21.1419 12.2744 21.7921 11.8943 21.8621C11.8343 21.8721 11.7743 21.8821 11.7143 21.8821H11.7243ZM12.7245 16.181V19.6016C13.7146 19.2916 14.7948 18.7915 15.2049 18.1814C15.675 17.4812 15.605 16.091 15.385 14.9008C14.5248 15.3808 13.6346 15.8109 12.7245 16.181ZM9.66388 12.0302L11.9643 14.3307C13.1845 13.8306 14.3648 13.2204 15.485 12.5103C19.9358 9.51974 21.2361 5.60901 21.4561 2.53843C19.6157 2.67846 17.8254 3.20856 16.2051 4.09872C14.2847 5.14892 12.6544 6.68921 11.4942 8.54956C10.7841 9.65977 10.174 10.82 9.66388 12.0302ZM4.39289 11.2701H7.81353C8.1936 10.3599 8.63368 9.46974 9.11377 8.60957C7.92355 8.38953 6.51329 8.31952 5.81315 8.78961C5.19304 9.19968 4.70294 10.3099 4.39289 11.2701Z\" fill=\"#673DE6\"\/>\n                <\/svg>\n                <p class=\"protip__title\">\n                    Astuce                <\/p>\n            <\/div>\n            <p class=\"protip__content\">Lors du d&eacute;pannage de probl&egrave;mes r&eacute;seau avec <strong>netstat -s<\/strong>, recherchez : <\/p><li><strong>Un taux &eacute;lev&eacute; de retransmissions<\/strong> &ndash; indique une congestion du r&eacute;seau ou des connexions instables.\n<\/li><li><strong>Perte de paquets en UDP<\/strong> &ndash; indique une interf&eacute;rence r&eacute;seau ou une bande passante insuffisante.\n<\/li><li><strong>Erreurs ICMP<\/strong> &ndash; indiquent des probl&egrave;mes de routage ou des restrictions de pare-feu.<\/p>\n                    <\/div>\n         <\/li><h3 class=\"wp-block-heading\" id=\"h-find-connections-associated-with-a-specific-program\"><strong>Trouvez les connexions associ&eacute;es &agrave; un programme sp&eacute;cifique<\/strong> <\/h3><p class=\"wp-block-paragraph\">Pour identifier quel programme poss&egrave;de une connexion r&eacute;seau, utilisez la commande <strong>netstat -pt<\/strong>. Cela affiche les connexions TCP actives ainsi que l&rsquo;identifiant de processus (PID) et le nom du programme associ&eacute;, ce qui vous aide &agrave; surveiller les applications en cours d&rsquo;ex&eacute;cution et &agrave; d&eacute;tecter toute activit&eacute; suspecte.<\/p><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -pt<\/pre><p class=\"wp-block-paragraph\">Vous devriez voir la colonne <strong>PID\/Program name<\/strong> compl&egrave;tement &agrave; droite de la sortie, comme illustr&eacute; ci-dessous :<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc60211a31\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc60211a31\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"104\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-pt-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -pt affiche les programmes associ&eacute;s &agrave; chaque connexion r&eacute;seau.\" class=\"wp-image-47566\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-pt-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-pt-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-pt-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-pt-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Ici, <strong>318706<\/strong> est le PID, tandis que <strong>sshd<\/strong> est le programme associ&eacute; &agrave; la connexion.<\/p><p class=\"wp-block-paragraph\">Si plusieurs connexions partagent le m&ecirc;me PID, une seule application g&egrave;re plus d&rsquo;une session. De plus, un tiret (<strong>&ndash;<\/strong>) dans la colonne indique que <strong>netstat<\/strong> n&rsquo;a pas pu r&eacute;cup&eacute;rer le nom du programme, g&eacute;n&eacute;ralement en raison de restrictions de permissions.<\/p><h3 class=\"wp-block-heading\" id=\"h-filter-output-with-options\"><strong>Filtrer la sortie avec des options<\/strong> <\/h3><p class=\"wp-block-paragraph\">Comme expliqu&eacute; pr&eacute;c&eacute;demment, vous pouvez affiner la sortie de <strong>netstat<\/strong> et vous concentrer sur des d&eacute;tails sp&eacute;cifiques en combinant plusieurs options. Le filtrage des donn&eacute;es inutiles rend le d&eacute;pannage plus efficace et aide &agrave; rep&eacute;rer plus rapidement les probl&egrave;mes r&eacute;seau.<\/p><p class=\"wp-block-paragraph\">Voici quelques combinaisons utiles :<\/p><ul class=\"wp-block-list\">\n<li>R&eacute;pertoriez tous les ports TCP et UDP &agrave; l&rsquo;&eacute;coute avec des adresses num&eacute;riques :<\/li>\n<\/ul><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -tunl<\/pre><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6021242b\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6021242b\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"562\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunl-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -tunl affiche tous les ports TCP et UDP en &eacute;coute avec des adresses num&eacute;riques.\" class=\"wp-image-47570\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunl-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunl-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunl-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tunl-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Affichez toutes les connexions actives ainsi que les PID :<\/li>\n<\/ul><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -tapn<\/pre><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc60212b53\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc60212b53\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"329\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tapn-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -tapn affiche les connexions actives avec leurs PID.\n\" class=\"wp-image-47571\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tapn-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tapn-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tapn-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tapn-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Analysez les tables de routage avec des adresses num&eacute;riques :<\/li>\n<\/ul><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -rn<\/pre><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc602132cc\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc602132cc\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"156\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-rn-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -rn affiche une table de routage IP avec des adresses num&eacute;riques.\" class=\"wp-image-47573\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-rn-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-rn-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-rn-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-rn-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Surveillance des interfaces r&eacute;seau et de leurs statistiques :<\/li>\n<\/ul><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -ie<\/pre><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc60213a08\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc60213a08\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"541\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-ie-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -ie affiche les interfaces r&eacute;seau et leurs statistiques.\" class=\"wp-image-47575\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-ie-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-ie-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-ie-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-ie-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><h3 class=\"wp-block-heading\" id=\"h-use-netstat-with-other-commands\"><strong>Utilisez netstat avec d&rsquo;autres commandes<\/strong> <\/h3><p class=\"wp-block-paragraph\">Outre la combinaison de plusieurs options pour filtrer des d&eacute;tails sp&eacute;cifiques, vous pouvez rediriger la sortie de <strong>netstat<\/strong> vers d&rsquo;autres outils en ligne de commande comme <strong>grep<\/strong>, <strong>awk<\/strong> et <strong>wc<\/strong>. Cela permet d&rsquo;extraire les donn&eacute;es r&eacute;seau pertinentes et de les pr&eacute;senter dans un format plus lisible.<\/p><ul class=\"wp-block-list\">\n<li>Filtrer les connexions par num&eacute;ro de port :<\/li>\n<\/ul><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -an | grep \":80\"<\/pre><p class=\"wp-block-paragraph\">Ici, <a href=\"\/fr\/tutoriels\/commande-grep-sous-linux\/\">grep<\/a> filtre et affiche uniquement les connexions li&eacute;es au port <strong>80<\/strong> (HTTP).<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6021427d\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6021427d\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"113\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-80-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"\" class=\"wp-image-47577\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-80-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-80-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-80-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-80-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Afficher uniquement les connexions &agrave; l&rsquo;&eacute;coute :<\/li>\n<\/ul><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -an | grep LISTEN<\/pre><p class=\"wp-block-paragraph\">Cela filtre les r&eacute;sultats pour n&rsquo;afficher que les ports &agrave; l&rsquo;&eacute;tat <strong>LISTEN<\/strong>.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc60214b93\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc60214b93\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"536\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-ecoute-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La commande netstat -an | grep LISTEN affiche les ports &agrave; l&rsquo;&eacute;tat LISTEN.\" class=\"wp-image-47579\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-ecoute-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-ecoute-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-ecoute-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-grep-ecoute-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Extraire les PID associ&eacute;s aux connexions :<\/li>\n<\/ul><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -tpn | awk '{print $7}'<\/pre><p class=\"wp-block-paragraph\">Dans cette commande, awk extrait la <strong>7e<\/strong> colonne contenant les PID et les noms de programmes.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc6021538b\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc6021538b\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"174\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tpn-awk-print-7-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -tpn | awk '{print }' affiche les PID et les noms de programmes.\" class=\"wp-image-47581\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tpn-awk-print-7-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tpn-awk-print-7-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tpn-awk-print-7-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-tpn-awk-print-7-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Comptez le nombre de connexions actives :<\/li>\n<\/ul><pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">netstat -an | wc -l<\/pre><p class=\"wp-block-paragraph\"><strong>wc -l <\/strong>compte le nombre total de connexions actuellement actives.<\/p><div class=\"wp-block-image\">\n<figure data-wp-context='{\"imageId\":\"6a8bc60215b7e\"}' data-wp-interactive=\"core\/image\" data-wp-key=\"6a8bc60215b7e\" class=\"aligncenter size-large wp-lightbox-container\"><img decoding=\"async\" width=\"1024\" height=\"121\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-wc-l-sortie.png\/w=1024,h=1024,fit=scale-down\" alt=\"La sortie de la commande netstat -an | wc -l affiche le total des connexions actives.\" class=\"wp-image-47585\" srcset=\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-wc-l-sortie.png\/w=1024,fit=scale-down 1024w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-wc-l-sortie.png\/w=300,fit=scale-down 300w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-wc-l-sortie.png\/w=150,fit=scale-down 150w, https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/46\/2026\/03\/terminal-netstat-an-wc-l-sortie.png\/w=768,fit=scale-down 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><button class=\"lightbox-trigger\" type=\"button\" aria-haspopup=\"dialog\" data-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\" data-wp-init=\"callbacks.initTriggerButton\" data-wp-on--click=\"actions.showLightbox\" data-wp-style--right=\"state.thisImage.buttonRight\" data-wp-style--top=\"state.thisImage.buttonTop\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\"><\/path>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><h2 class=\"wp-block-heading\" id=\"h-conclusion\"><strong>Conclusion<\/strong> <\/h2><p class=\"wp-block-paragraph\">La commande <strong>netstat<\/strong> est un outil puissant pour surveiller les informations li&eacute;es au r&eacute;seau sur divers syst&egrave;mes d&rsquo;exploitation, notamment Linux. Dans cet article, nous avons explor&eacute; sa syntaxe, ses options courantes et des cas d&rsquo;utilisation concrets, tels que l&rsquo;affichage des statistiques de protocole, la liste des connexions actives et l&rsquo;analyse des tables de routage.<\/p><p class=\"wp-block-paragraph\">En explorant diff&eacute;rentes options et en combinant netstat avec d&rsquo;autres commandes comme <strong>grep<\/strong> et <strong>awk<\/strong>, vous pouvez obtenir des informations plus d&eacute;taill&eacute;es sur l&rsquo;activit&eacute; r&eacute;seau et diagnostiquer les probl&egrave;mes plus efficacement.<\/p><p class=\"wp-block-paragraph\">Cependant, <strong>netstat<\/strong> a &eacute;t&eacute; d&eacute;pr&eacute;ci&eacute; dans certaines distributions Linux r&eacute;centes. Bien qu&rsquo;il reste utile pour des t&acirc;ches simples, nous recommandons d&rsquo;utiliser <strong>ss<\/strong> (pour les statistiques de sockets) et <strong>ip route<\/strong> (pour l&rsquo;analyse du routage) comme alternatives modernes, car ils offrent des performances plus rapides et un affichage plus d&eacute;taill&eacute;.<\/p><p class=\"wp-block-paragraph\">Si vous avez des questions &agrave; propos de <strong>netstat<\/strong> ou souhaitez partager votre exp&eacute;rience de son utilisation &mdash; ou de passage &agrave; des outils alternatifs &mdash; faites-le-nous savoir dans les commentaires ci-dessous.<\/p><h2 class=\"wp-block-heading\" id=\"h-netstat-command-faq\"><strong>FAQ sur la commande netstat<\/strong> <\/h2><div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-question-1775038750267\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">&Agrave; quoi sert la commande netstat ?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>La commande&nbsp;<strong>netstat<\/strong>&nbsp;surveille les connexions r&eacute;seau, affiche les tables de routage et fournit des statistiques sur les protocoles. Les administrateurs syst&egrave;me l&rsquo;utilisent pour diagnostiquer des probl&egrave;mes de connectivit&eacute;, trouver des ports ouverts et analyser le flux de trafic sous Linux, Windows et macOS.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1775038751770\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong><strong>Comment utiliser la commande netstat ?<\/strong><\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Pour utiliser la commande netstat, ouvrez une fen&ecirc;tre de terminal et saisissez&nbsp;<strong>netstat<\/strong>. Cela affiche les connexions actives et les statistiques des sockets. Vous pouvez ajouter des options pour obtenir une sortie plus d&eacute;taill&eacute;e, comme&nbsp;<strong>-t&nbsp;<\/strong>pour lister les connexions TCP et&nbsp;<strong>-l&nbsp;<\/strong>pour n&rsquo;afficher que les ports en &eacute;coute.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1775038752337\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong><strong>En quoi netstat est-il diff&eacute;rent de la commande ss ?<\/strong><\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>La commande&nbsp;<strong>ss<\/strong>&nbsp;constitue une alternative plus rapide &agrave;&nbsp;<strong>netstat<\/strong>, offrant des statistiques de sockets plus d&eacute;taill&eacute;es avec une moindre utilisation des ressources. Contrairement &agrave;&nbsp;<strong>netstat<\/strong>,&nbsp;<strong>ss<\/strong>&nbsp;r&eacute;cup&egrave;re en temps r&eacute;el des donn&eacute;es directement du noyau. De nombreuses distributions Linux modernes ont d&eacute;pr&eacute;ci&eacute;&nbsp;<strong>netstat<\/strong>&nbsp;au profit de&nbsp;<strong>ss<\/strong>&nbsp;pour de meilleures performances et une pr&eacute;cision accrue.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>netstat (abr&eacute;viation de &laquo; network statistics &raquo;) est un outil en ligne de commande pour surveiller les connexions r&eacute;seau, diagnostiquer des probl&egrave;mes et collecter des donn&eacute;es importantes li&eacute;es au r&eacute;seau. Disponible sur Linux, Windows et macOS, il fournit des informations en temps r&eacute;el sur les connexions TCP et UDP actives, les ports &agrave; l&rsquo;&eacute;coute, les [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"\/fr\/tutoriels\/commande-netstat\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":190,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"Comment utiliser la commande netstat sous Linux","rank_math_description":"La commande netstat affiche les connexions r\u00e9seau sous Linux. Apprenez \u00e0 l\u2019utiliser pour analyser et r\u00e9soudre les probl\u00e8mes.","rank_math_focus_keyword":"commande netstat","footnotes":""},"categories":[5877,5845],"tags":[],"class_list":["post-47586","post","type-post","status-publish","format-standard","hentry","category-surveillance-et-securite","category-vps"],"hreflangs":[{"locale":"en-US","link":"https:\/\/www.hostinger.com\/tutorials\/netstat-command\/","default":0},{"locale":"fr-FR","link":"https:\/\/www.hostinger.com\/fr\/tutoriels\/commande-netstat\/","default":0},{"locale":"es-ES","link":"https:\/\/www.hostinger.com\/es\/tutoriales\/como-usar-comando-netstat-en-linux\/","default":0},{"locale":"en-PH","link":"https:\/\/www.hostinger.com\/ph\/tutorials\/netstat-command\/","default":0},{"locale":"en-MY","link":"https:\/\/www.hostinger.com\/my\/tutorials\/netstat-command\/","default":0},{"locale":"en-GB","link":"https:\/\/www.hostinger.com\/uk\/tutorials\/netstat-command\/","default":0},{"locale":"en-IN","link":"https:\/\/www.hostinger.com\/in\/tutorials\/netstat-command\/","default":0},{"locale":"en-CA","link":"https:\/\/www.hostinger.com\/ca\/tutorials\/netstat-command\/","default":0},{"locale":"en-AU","link":"https:\/\/www.hostinger.com\/au\/tutorials\/netstat-command\/","default":0},{"locale":"en-NG","link":"https:\/\/www.hostinger.com\/ng\/tutorials\/netstat-command\/","default":0},{"locale":"es-AR","link":"https:\/\/www.hostinger.com\/ar\/tutoriales\/como-usar-comando-netstat-en-linux\/","default":0},{"locale":"es-MX","link":"https:\/\/www.hostinger.com\/mx\/tutoriales\/como-usar-comando-netstat-en-linux\/","default":0},{"locale":"es-CO","link":"https:\/\/www.hostinger.com\/co\/tutoriales\/como-usar-comando-netstat-en-linux\/","default":0}],"_links":{"self":[{"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/posts\/47586","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/users\/190"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/comments?post=47586"}],"version-history":[{"count":8,"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/posts\/47586\/revisions"}],"predecessor-version":[{"id":47685,"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/posts\/47586\/revisions\/47685"}],"wp:attachment":[{"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/media?parent=47586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/categories?post=47586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hostinger.com\/fr\/tutoriels\/wp-json\/wp\/v2\/tags?post=47586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}