{"id":181,"date":"2026-05-02T01:36:35","date_gmt":"2026-05-01T23:36:35","guid":{"rendered":"https:\/\/eryann.fr\/?p=181"},"modified":"2026-05-02T14:09:00","modified_gmt":"2026-05-02T12:09:00","slug":"fiche-routage-configuration-et-gestion-des-routes-sous-linux","status":"publish","type":"post","link":"https:\/\/eryann.fr\/index.php\/reseau\/fiche-routage-configuration-et-gestion-des-routes-sous-linux\/","title":{"rendered":"Fiche routage : configuration et gestion des routes sous Linux"},"content":{"rendered":"\n<p>Pour les \u00e9tudiants en BTS CIEL ou SIO, le routage est une notion fondamentale.<br>Il permet :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>de relier plusieurs r\u00e9seaux<\/li>\n\n\n\n<li>d\u2019atteindre des machines hors du r\u00e9seau local<\/li>\n\n\n\n<li>de comprendre le chemin des paquets<\/li>\n<\/ul>\n\n\n\n<p>Cette fiche inclut :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>routes statiques<\/li>\n\n\n\n<li>passerelle<\/li>\n\n\n\n<li>multi-r\u00e9seaux<\/li>\n\n\n\n<li><strong>persistance des routes (tr\u00e8s important en production)<\/strong><\/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\/3e9a2c0c-27a3-4fb2-948d-c782729005b9-683x1024.png\" alt=\"\" class=\"wp-image-183\" srcset=\"https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/3e9a2c0c-27a3-4fb2-948d-c782729005b9-683x1024.png 683w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/3e9a2c0c-27a3-4fb2-948d-c782729005b9-200x300.png 200w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/3e9a2c0c-27a3-4fb2-948d-c782729005b9-768x1152.png 768w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/3e9a2c0c-27a3-4fb2-948d-c782729005b9.png 1024w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Configuration du routage (bloc unique)<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code># =========================================================<br># AFFICHER LES ROUTES<br># =========================================================<br><br>ip route<br><br># =========================================================<br># PASSERELLE PAR DEFAUT<br># =========================================================<br><br>ip route add default via 192.168.1.1<br>ip route del default via 192.168.1.1<br><br># =========================================================<br># ROUTE STATIQUE<br># =========================================================<br><br>ip route add 192.168.2.0\/24 via 192.168.1.1<br>ip route del 192.168.2.0\/24<br><br># =========================================================<br># ROUTE VIA INTERFACE<br># =========================================================<br><br>ip route add 192.168.3.0\/24 dev eth1<br><br># =========================================================<br># ROUTAGE MULTI RESEAUX<br># =========================================================<br><br>ip route add 10.0.0.0\/24 via 192.168.1.254<br>ip route add 172.16.0.0\/16 via 192.168.1.253<br><br># =========================================================<br># TEST<br># =========================================================<br><br>ping 192.168.2.10<br>traceroute 192.168.2.10<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Explication d\u00e9taill\u00e9e<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Table de routage<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip route<\/code><\/pre>\n\n\n\n<p>Exemple :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>default via 192.168.1.1 dev eth0<br>192.168.1.0\/24 dev eth0 proto kernel<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Passerelle<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip route add default via 192.168.1.1<\/code><\/pre>\n\n\n\n<p> utilis\u00e9e pour :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Internet<\/li>\n\n\n\n<li>r\u00e9seaux inconnus<\/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\">Route statique<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip route add 192.168.2.0\/24 via 192.168.1.1<\/code><\/pre>\n\n\n\n<p> permet d\u2019atteindre un r\u00e9seau distant<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Multi-r\u00e9seaux<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip route add 10.0.0.0\/24 via 192.168.1.254<\/code><\/pre>\n\n\n\n<p> plusieurs routes possibles vers diff\u00e9rents r\u00e9seaux<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"> Important : persistance des routes<\/h2>\n\n\n\n<p> Les commandes <code>ip route<\/code> sont <strong>temporaires<\/strong><br> perdues au red\u00e9marrage<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Configuration persistante (Debian)<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>nano \/etc\/network\/interfaces<\/code><\/pre>\n\n\n\n<p>Exemple :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>auto eth0<br>iface eth0 inet static<br>    address 192.168.1.10\/24<br>    gateway 192.168.1.1<br><br>    # Routes statiques<br>    up ip route add 192.168.2.0\/24 via 192.168.1.1<br>    up ip route add 10.0.0.0\/24 via 192.168.1.254<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Configuration persistante (script systemd)<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>nano \/usr\/local\/bin\/routes.sh<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>#!\/bin\/bash<br>ip route add 192.168.2.0\/24 via 192.168.1.1<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>chmod +x \/usr\/local\/bin\/routes.sh<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>nano \/etc\/systemd\/system\/routes.service<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;Unit]<br>Description=Routes statiques<br><br>&#91;Service]<br>ExecStart=\/usr\/local\/bin\/routes.sh<br>RemainAfterExit=yes<br><br>&#91;Install]<br>WantedBy=multi-user.target<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>systemctl enable routes<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Configuration persistante (Ubuntu Netplan)<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>nano \/etc\/netplan\/01-netcfg.yaml<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>network:<br>  version: 2<br>  ethernets:<br>    eth0:<br>      addresses:<br>        - 192.168.1.10\/24<br>      gateway4: 192.168.1.1<br>      routes:<br>        - to: 192.168.2.0\/24<br>          via: 192.168.1.1<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>netplan apply<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Cas pratiques<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Pas d\u2019acc\u00e8s Internet<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip route<\/code><\/pre>\n\n\n\n<p> v\u00e9rifier la pr\u00e9sence de <code>default<\/code><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">R\u00e9seau distant inaccessible<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip route add 192.168.2.0\/24 via 192.168.1.1<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Mauvais chemin r\u00e9seau<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>traceroute 192.168.2.10<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Bonnes pratiques<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>toujours d\u00e9finir une passerelle<\/li>\n\n\n\n<li>rendre les routes persistantes<\/li>\n\n\n\n<li>documenter les r\u00e9seaux<\/li>\n\n\n\n<li>tester apr\u00e8s chaque modification<\/li>\n\n\n\n<li>\u00e9viter les conflits de routes<\/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\">R\u00e9capitulatif des fichiers importants<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Fichier<\/th><th>R\u00f4le<\/th><\/tr><\/thead><tbody><tr><td>\/etc\/network\/interfaces<\/td><td>config Debian<\/td><\/tr><tr><td>\/etc\/netplan\/*.yaml<\/td><td>config Ubuntu<\/td><\/tr><tr><td>\/etc\/systemd\/system\/routes.service<\/td><td>service custom<\/td><\/tr><tr><td>ip route<\/td><td>table de routage<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>Le routage permet :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>de connecter plusieurs r\u00e9seaux<\/li>\n\n\n\n<li>de ma\u00eetriser les flux<\/li>\n\n\n\n<li>de comprendre le fonctionnement du r\u00e9seau<\/li>\n<\/ul>\n\n\n\n<p> Attention :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>ip route<\/code> = temporaire<\/li>\n\n\n\n<li>config fichier = permanent<\/li>\n<\/ul>\n\n\n\n<p>C\u2019est une comp\u00e9tence essentielle en administration syst\u00e8me et r\u00e9seau.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><audio autoplay=\"\"><\/audio><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pour les \u00e9tudiants en BTS CIEL ou SIO, le routage est une notion fondamentale.Il permet : Cette fiche inclut : Configuration du routage (bloc unique) Explication d\u00e9taill\u00e9e Table de routage Exemple : Passerelle utilis\u00e9e pour : Route statique permet d\u2019atteindre un r\u00e9seau distant Multi-r\u00e9seaux plusieurs routes possibles vers diff\u00e9rents r\u00e9seaux Important : persistance des routes [&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 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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-181","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 routage : configuration et gestion des routes sous Linux - 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-routage-configuration-et-gestion-des-routes-sous-linux\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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