{"id":210,"date":"2026-05-02T10:59:59","date_gmt":"2026-05-02T08:59:59","guid":{"rendered":"https:\/\/eryann.fr\/?p=210"},"modified":"2026-05-02T14:08:59","modified_gmt":"2026-05-02T12:08:59","slug":"fiche-configuration-reseau-avec-netplan-debian-ubuntu","status":"publish","type":"post","link":"https:\/\/eryann.fr\/index.php\/reseau\/fiche-configuration-reseau-avec-netplan-debian-ubuntu\/","title":{"rendered":"Fiche configuration r\u00e9seau avec Netplan (debian\/ubuntu)"},"content":{"rendered":"\n<p>La configuration r\u00e9seau est une comp\u00e9tence essentielle pour tout administrateur syst\u00e8mes et r\u00e9seaux. Dans un contexte BTS CIEL ou SIO, comprendre et ma\u00eetriser <strong>Netplan<\/strong> permet de configurer rapidement des interfaces r\u00e9seau (Ethernet, Wi-Fi, multi-IP, multi-cartes) sur des syst\u00e8mes modernes comme Ubuntu ou Debian r\u00e9cents. Cette fiche vous guide pas \u00e0 pas avec des cas concrets et directement exploitables.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"1024\" src=\"https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e53b57c1-1204-4af8-a59d-954a44a38560-683x1024.png\" alt=\"\" class=\"wp-image-211\" srcset=\"https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e53b57c1-1204-4af8-a59d-954a44a38560-683x1024.png 683w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e53b57c1-1204-4af8-a59d-954a44a38560-200x300.png 200w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e53b57c1-1204-4af8-a59d-954a44a38560-768x1152.png 768w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e53b57c1-1204-4af8-a59d-954a44a38560.png 1024w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Bloc de configuration complet (exemples pratiques)<\/strong><\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code># \/etc\/netplan\/01-config.yaml<br># Configuration Netplan compl\u00e8te avec plusieurs cas<br><br>network:<br>  version: 2<br>  renderer: networkd   # systemd-networkd (serveur) ou NetworkManager (desktop)<br><br>  ethernets:<br><br>    # ===== CAS 1 : DHCP =====<br>    eth0:<br>      dhcp4: true<br><br>    # ===== CAS 2 : IP fixe =====<br>    eth1:<br>      dhcp4: false<br>      addresses:<br>        - 192.168.10.10\/24<br>      routes:<br>        - to: default<br>          via: 192.168.10.1<br>      nameservers:<br>        addresses: &#91;8.8.8.8, 1.1.1.1]<br><br>    # ===== CAS 3 : Plusieurs IP sur une interface =====<br>    eth2:<br>      dhcp4: false<br>      addresses:<br>        - 192.168.20.10\/24<br>        - 192.168.20.11\/24<br>        - 192.168.20.12\/24<br><br>    # ===== CAS 4 : Deux interfaces avec IP fixe =====<br>    eth3:<br>      dhcp4: false<br>      addresses:<br>        - 10.0.0.10\/24<br><br>    eth4:<br>      dhcp4: false<br>      addresses:<br>        - 172.16.0.10\/24<br><br>  wifis:<br><br>    # ===== CAS 5 : Connexion Wi-Fi =====<br>    wlan0:<br>      dhcp4: true<br>      access-points:<br>        \"MonSSID\":<br>          password: \"MotDePasseWifi\"<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Explication d\u00e9taill\u00e9e<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 1. Structure Netplan<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>network:<\/code> \u2192 racine de la configuration<\/li>\n\n\n\n<li><code>version: 2<\/code> \u2192 version actuelle du format<\/li>\n\n\n\n<li><code>renderer:<\/code>\n<ul class=\"wp-block-list\">\n<li><code>networkd<\/code> \u2192 recommand\u00e9 pour serveurs<\/li>\n\n\n\n<li><code>NetworkManager<\/code> \u2192 postes utilisateurs<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 2. Interfaces r\u00e9seau<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Ethernet<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>ethernets:<\/code> \u2192 interfaces filaires<\/li>\n\n\n\n<li>noms typiques :\n<ul class=\"wp-block-list\">\n<li><code>eth0<\/code>, <code>eth1<\/code> (anciens syst\u00e8mes)<\/li>\n\n\n\n<li><code>enp0s3<\/code>, <code>ens33<\/code> (noms modernes bas\u00e9s sur le mat\u00e9riel)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Wi-Fi<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>wifis:<\/code> \u2192 interfaces sans fil<\/li>\n\n\n\n<li>ex : <code>wlan0<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 3. DHCP<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>dhcp4: true<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Attribution automatique IP, passerelle et DNS<\/li>\n\n\n\n<li>Utilis\u00e9 en entreprise ou lab<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 4. IP fixe<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>addresses:<br>  - 192.168.1.10\/24<br>routes:<br>  - to: default<br>    via: 192.168.1.1<br>nameservers:<br>  addresses: &#91;8.8.8.8]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>addresses<\/code> \u2192 IP + masque CIDR<\/li>\n\n\n\n<li><code>routes<\/code> \u2192 passerelle (gateway)<\/li>\n\n\n\n<li><code>nameservers<\/code> \u2192 DNS<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 5. Plusieurs IP sur une interface<\/h3>\n\n\n\n<p>Permet :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>h\u00e9bergement multi-sites<\/li>\n\n\n\n<li>virtualisation<\/li>\n\n\n\n<li>services multiples<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 6. Multi-interfaces<\/h3>\n\n\n\n<p>Cas typique :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>r\u00e9seau LAN<\/li>\n\n\n\n<li>r\u00e9seau admin<\/li>\n\n\n\n<li>DMZ<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 7. Wi-Fi<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>access-points:<br>  \"SSID\":<br>    password: \"cl\u00e9\"<\/code><\/pre>\n\n\n\n<p>Attention \u00e0 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>indentation YAML (critique)<\/li>\n\n\n\n<li>guillemets pour SSID<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Commandes Netplan (application et debug)<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"> Appliquer la configuration<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo netplan apply<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd0d Tester sans appliquer<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo netplan try<\/code><\/pre>\n\n\n\n<p>\u27a1\ufe0f rollback automatique si erreur<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd0e V\u00e9rifier la configuration g\u00e9n\u00e9r\u00e9e<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo netplan generate<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udce1 V\u00e9rifier les interfaces r\u00e9seau<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip a<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83c\udf10 V\u00e9rifier la route<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip route<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"> Tester connectivit\u00e9<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ping 8.8.8.8<br>ping google.com<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"> Wi-Fi diagnostic<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>iw dev<br>nmcli dev wifi list<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Logs systemd-networkd<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>journalctl -u systemd-networkd<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"> V\u00e9rifier le renderer actif<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>networkctl status<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Erreurs fr\u00e9quentes<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li> Mauvaise indentation YAML<\/li>\n\n\n\n<li> Mauvais nom d\u2019interface<\/li>\n\n\n\n<li> Oubli de la gateway<\/li>\n\n\n\n<li> DNS absent \u2192 pas de r\u00e9solution<\/li>\n\n\n\n<li> conflit IP<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Recap \u2013 fichiers importants<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>\/etc\/netplan\/*.yaml<\/code><\/li>\n\n\n\n<li><code>\/run\/systemd\/network\/<\/code><\/li>\n\n\n\n<li><code>\/etc\/systemd\/network\/<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h2>\n\n\n\n<p>Netplan est un outil puissant et moderne qui permet :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>une configuration centralis\u00e9e<\/li>\n\n\n\n<li>une gestion multi-interface avanc\u00e9e<\/li>\n\n\n\n<li>une automatisation facile<\/li>\n<\/ul>\n\n\n\n<p>C\u2019est une comp\u00e9tence incontournable pour :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>BTS CIEL (r\u00e9seaux, infra)<\/li>\n\n\n\n<li>BTS SIO (SISR)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>La configuration r\u00e9seau est une comp\u00e9tence essentielle pour tout administrateur syst\u00e8mes et r\u00e9seaux. Dans un contexte BTS CIEL ou SIO, comprendre et ma\u00eetriser Netplan permet de configurer rapidement des interfaces r\u00e9seau (Ethernet, Wi-Fi, multi-IP, multi-cartes) sur des syst\u00e8mes modernes comme Ubuntu ou Debian r\u00e9cents. Cette fiche vous guide pas \u00e0 pas avec des cas concrets [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[12,10],"tags":[],"class_list":["post-210","post","type-post","status-publish","format-standard","hentry","category-linux","category-reseau"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fiche configuration r\u00e9seau avec Netplan (debian\/ubuntu) - Eryann Breizh SecOps<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/eryann.fr\/index.php\/reseau\/fiche-configuration-reseau-avec-netplan-debian-ubuntu\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fiche configuration r\u00e9seau avec Netplan (debian\/ubuntu) - Eryann Breizh SecOps\" \/>\n<meta property=\"og:description\" content=\"La configuration r\u00e9seau est une comp\u00e9tence essentielle pour tout administrateur syst\u00e8mes et r\u00e9seaux. 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