{"id":213,"date":"2026-05-02T11:07:22","date_gmt":"2026-05-02T09:07:22","guid":{"rendered":"https:\/\/eryann.fr\/?p=213"},"modified":"2026-05-02T14:08:59","modified_gmt":"2026-05-02T12:08:59","slug":"fiche-configuration-reseau-avec-etc-network-interfaces-debian","status":"publish","type":"post","link":"https:\/\/eryann.fr\/index.php\/reseau\/fiche-configuration-reseau-avec-etc-network-interfaces-debian\/","title":{"rendered":"Fiche configuration r\u00e9seau avec \/etc\/network\/interfaces (Debian)"},"content":{"rendered":"\n<p>La configuration r\u00e9seau via <code>\/etc\/network\/interfaces<\/code> est une m\u00e9thode classique sous Debian.<br>Elle reste tr\u00e8s utilis\u00e9e sur les serveurs et environnements professionnels.<\/p>\n\n\n\n<p>Cette fiche permet de :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>comprendre le fonctionnement<\/li>\n\n\n\n<li>configurer les cas courants<\/li>\n\n\n\n<li>diagnostiquer efficacement<\/li>\n<\/ul>\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\/87afeb11-f354-423f-9c5b-8d0337973f65-683x1024.png\" alt=\"\" class=\"wp-image-214\" srcset=\"https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/87afeb11-f354-423f-9c5b-8d0337973f65-683x1024.png 683w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/87afeb11-f354-423f-9c5b-8d0337973f65-200x300.png 200w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/87afeb11-f354-423f-9c5b-8d0337973f65-768x1152.png 768w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/87afeb11-f354-423f-9c5b-8d0337973f65.png 1024w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Configuration compl\u00e8te <\/strong><\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code># \/etc\/network\/interfaces<br><br># Loopback (obligatoire)<br>auto lo<br>iface lo inet loopback<br><br># ===== DHCP =====<br>auto eth0<br>iface eth0 inet dhcp<br><br># ===== IP fixe =====<br>auto eth1<br>iface eth1 inet static<br>    address 192.168.10.10<br>    netmask 255.255.255.0<br>    gateway 192.168.10.1<br>    dns-nameservers 8.8.8.8 1.1.1.1<br><br># ===== Multi-IP =====<br>auto eth2<br>iface eth2 inet static<br>    address 192.168.20.10<br>    netmask 255.255.255.0<br><br>iface eth2:0 inet static<br>    address 192.168.20.11<br>    netmask 255.255.255.0<br><br>iface eth2:1 inet static<br>    address 192.168.20.12<br>    netmask 255.255.255.0<br><br># ===== Multi-interface =====<br>auto eth3<br>iface eth3 inet static<br>    address 10.0.0.10<br>    netmask 255.255.255.0<br><br>auto eth4<br>iface eth4 inet static<br>    address 172.16.0.10<br>    netmask 255.255.255.0<br><br># ===== Wi-Fi =====<br>auto wlan0<br>iface wlan0 inet dhcp<br>    wpa-ssid \"MonSSID\"<br>    wpa-psk \"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\"><strong>Structure g\u00e9n\u00e9rale<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>auto<\/code> \u2192 active l\u2019interface au d\u00e9marrage<\/li>\n\n\n\n<li><code>iface<\/code> \u2192 d\u00e9finit le mode de configuration<\/li>\n<\/ul>\n\n\n\n<p>Format :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>iface &lt;interface&gt; inet &lt;mode&gt;<\/code><\/pre>\n\n\n\n<p>Modes :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>dhcp<\/code><\/li>\n\n\n\n<li><code>static<\/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\"><strong>DHCP<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Attribution automatique IP \/ passerelle \/ DNS<\/li>\n\n\n\n<li>utilis\u00e9 en environnement client 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\"><strong>IP fixe<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>n\u00e9cessaire pour :\n<ul class=\"wp-block-list\">\n<li>serveurs<\/li>\n\n\n\n<li>\u00e9quipements r\u00e9seau<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Param\u00e8tres essentiels :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>address<\/code><\/li>\n\n\n\n<li><code>netmask<\/code><\/li>\n\n\n\n<li><code>gateway<\/code><\/li>\n\n\n\n<li><code>dns-nameservers<\/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\"><strong>Multi-IP<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>plusieurs IP sur une m\u00eame interface<\/li>\n\n\n\n<li>utilisation :\n<ul class=\"wp-block-list\">\n<li>h\u00e9bergement web<\/li>\n\n\n\n<li>tests<\/li>\n\n\n\n<li>services multiples<\/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\"><strong>Multi-interface<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>permet de segmenter :\n<ul class=\"wp-block-list\">\n<li>LAN<\/li>\n\n\n\n<li>DMZ<\/li>\n\n\n\n<li>r\u00e9seau d\u2019administration<\/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\"><strong>Wi-Fi<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>n\u00e9cessite <code>wpasupplicant<\/code><\/li>\n\n\n\n<li>configuration simple dans interfaces<\/li>\n\n\n\n<li>ou avanc\u00e9e via :<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\/etc\/wpa_supplicant\/wpa_supplicant.conf<\/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>Commandes essentielles<\/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 systemctl restart networking<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Monter \/ d\u00e9monter interface<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo ifdown eth0<br>sudo ifup eth0<\/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>Commandes de diagnostic<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Interfaces<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip a<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Routes<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip route<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">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<h3 class=\"wp-block-heading\">Logs<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>journalctl -u networking<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">DNS<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>cat \/etc\/resolv.conf<\/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>Fichiers importants<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>\/etc\/network\/interfaces<\/code> \u2192 configuration principale<\/li>\n\n\n\n<li><code>\/etc\/resolv.conf<\/code> \u2192 DNS<\/li>\n\n\n\n<li><code>\/etc\/hostname<\/code> \u2192 nom machine<\/li>\n\n\n\n<li><code>\/etc\/hosts<\/code> \u2192 r\u00e9solution locale<\/li>\n\n\n\n<li><code>\/etc\/wpa_supplicant\/wpa_supplicant.conf<\/code> \u2192 Wi-Fi avanc\u00e9<\/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>Sch\u00e9ma de fonctionnement <\/strong><\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>\/etc\/network\/interfaces<br>        \u2193<br>Service networking<br>        \u2193<br>Commandes ifup \/ ifdown<br>        \u2193<br>Configuration noyau Linux (IP, routes, DNS)<br>        \u2193<br>Interfaces r\u00e9seau actives (eth0, wlan0\u2026)<\/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>oubli de <code>auto<\/code><\/li>\n\n\n\n<li>mauvais nom d\u2019interface<\/li>\n\n\n\n<li>mauvais netmask<\/li>\n\n\n\n<li>gateway incorrecte<\/li>\n\n\n\n<li>DNS absent<\/li>\n\n\n\n<li>conflit d\u2019adresse 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>Bonnes pratiques<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>tester avec <code>ifdown \/ ifup<\/code><\/li>\n\n\n\n<li>v\u00e9rifier avec <code>ip a<\/code><\/li>\n\n\n\n<li>documenter les IP<\/li>\n\n\n\n<li>sauvegarder avant modification<\/li>\n\n\n\n<li>segmenter les r\u00e9seaux<\/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<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>\/etc\/network\/interfaces<\/code> = configuration r\u00e9seau Debian classique<\/li>\n\n\n\n<li><code>ifup \/ ifdown<\/code> = application<\/li>\n\n\n\n<li><code>ip a \/ ip route<\/code> = v\u00e9rification<\/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>Cette m\u00e9thode reste :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>simple<\/li>\n\n\n\n<li>fiable<\/li>\n\n\n\n<li>tr\u00e8s utilis\u00e9e en production<\/li>\n<\/ul>\n\n\n\n<p> Indispensable pour :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>BTS CIEL<\/li>\n\n\n\n<li>BTS SIO (SISR)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>La configuration r\u00e9seau via \/etc\/network\/interfaces est une m\u00e9thode classique sous Debian.Elle reste tr\u00e8s utilis\u00e9e sur les serveurs et environnements professionnels. Cette fiche permet de : Configuration compl\u00e8te Explication d\u00e9taill\u00e9e Structure g\u00e9n\u00e9rale Format : Modes : DHCP IP fixe Param\u00e8tres essentiels : Multi-IP Multi-interface Wi-Fi Commandes essentielles Appliquer la configuration Monter \/ d\u00e9monter interface Commandes de [&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-213","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 \/etc\/network\/interfaces (Debian) - 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-etc-network-interfaces-debian\/\" \/>\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 \/etc\/network\/interfaces (Debian) - Eryann Breizh SecOps\" \/>\n<meta property=\"og:description\" content=\"La configuration r\u00e9seau via \/etc\/network\/interfaces est une m\u00e9thode classique sous Debian.Elle reste tr\u00e8s utilis\u00e9e sur les serveurs et environnements professionnels. 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