{"id":144,"date":"2026-05-01T23:49:37","date_gmt":"2026-05-01T21:49:37","guid":{"rendered":"https:\/\/eryann.fr\/?p=144"},"modified":"2026-05-02T14:09:00","modified_gmt":"2026-05-02T12:09:00","slug":"fiche-dhcp-debian-mise-en-place-dun-serveur-isc-dhcp-server","status":"publish","type":"post","link":"https:\/\/eryann.fr\/index.php\/reseau\/fiche-dhcp-debian-mise-en-place-dun-serveur-isc-dhcp-server\/","title":{"rendered":"Fiche dhcp Debian : mise en place d\u2019un serveur ISC DHCP SERVER"},"content":{"rendered":"\n<p>Pour les \u00e9tudiants en BTS CIEL ou SIO, DHCP et DNS sont \u00e9troitement li\u00e9s.<br>Le serveur DHCP peut automatiquement fournir aux clients :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>une adresse IP<\/li>\n\n\n\n<li>une passerelle<\/li>\n\n\n\n<li>un serveur DNS<\/li>\n\n\n\n<li>un nom de domaine<\/li>\n<\/ul>\n\n\n\n<p>Cette fiche montre une configuration DHCP compl\u00e8te sous Debian avec int\u00e9gration DNS.<\/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\/ChatGPT-Image-1-mai-2026-23_49_15-683x1024.png\" alt=\"\" class=\"wp-image-145\" srcset=\"https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/ChatGPT-Image-1-mai-2026-23_49_15-683x1024.png 683w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/ChatGPT-Image-1-mai-2026-23_49_15-200x300.png 200w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/ChatGPT-Image-1-mai-2026-23_49_15-768x1152.png 768w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/ChatGPT-Image-1-mai-2026-23_49_15.png 1024w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Configuration compl\u00e8te DHCP + DNS (bloc unique)<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code># =========================================================<br># INSTALLATION<br># =========================================================<br><br>apt update &amp;&amp; apt install isc-dhcp-server -y<br><br># =========================================================<br># INTERFACE RESEAU<br># =========================================================<br><br>nano \/etc\/default\/isc-dhcp-server<br><br>INTERFACESv4=\"eth0\"<br><br># =========================================================<br># CONFIGURATION DHCP AVEC DNS<br># =========================================================<br><br>nano \/etc\/dhcp\/dhcpd.conf<br><br># Domaine DNS fourni aux clients<br>option domain-name \"eryann.local\";<br><br># Serveur DNS (BIND ou autre)<br>option domain-name-servers 192.168.1.10;<br><br>default-lease-time 600;<br>max-lease-time 7200;<br><br>authoritative;<br><br># =========================================================<br># RESEAU<br># =========================================================<br><br>subnet 192.168.1.0 netmask 255.255.255.0 {<br><br>    range 192.168.1.100 192.168.1.200;<br><br>    option routers 192.168.1.1;<br>    option broadcast-address 192.168.1.255;<br><br>    # DNS distribu\u00e9 aux clients<br>    option domain-name-servers 192.168.1.10;<br><br>    # Domaine de recherche<br>    option domain-name \"eryann.local\";<br><br>}<br><br># =========================================================<br># RESERVATION DHCP + NOM DNS<br># =========================================================<br><br>host srv {<br>    hardware ethernet 00:11:22:33:44:55;<br>    fixed-address 192.168.1.20;<br>}<br><br># =========================================================<br># DEMARRAGE<br># =========================================================<br><br>systemctl restart isc-dhcp-server<br>systemctl enable isc-dhcp-server<br><br># =========================================================<br># VERIFICATION<br># =========================================================<br><br>systemctl status isc-dhcp-server<br><br># Voir les baux attribu\u00e9s<br>cat \/var\/lib\/dhcp\/dhcpd.leases<br><br># Logs DHCP<br>tail -f \/var\/log\/syslog<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explication d\u00e9taill\u00e9e<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. Int\u00e9gration DHCP \/ DNS<\/h4>\n\n\n\n<p>Le DHCP fournit automatiquement au client :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>option domain-name-servers<\/code> \u2192 IP du serveur DNS<\/li>\n\n\n\n<li><code>option domain-name<\/code> \u2192 suffixe DNS<\/li>\n<\/ul>\n\n\n\n<p>R\u00e9sultat c\u00f4t\u00e9 client :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>ping srv<\/code> \u2192 devient <code>srv.eryann.local<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">2. Fonctionnement global<\/h4>\n\n\n\n<p>Quand un client re\u00e7oit une configuration DHCP :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IP \u2192 attribu\u00e9e par le serveur<\/li>\n\n\n\n<li>Gateway \u2192 permet l\u2019acc\u00e8s r\u00e9seau<\/li>\n\n\n\n<li>DNS \u2192 permet la r\u00e9solution de noms<\/li>\n<\/ul>\n\n\n\n<p>Le DNS est donc indispensable pour :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>acc\u00e9der aux services internes<\/li>\n\n\n\n<li>r\u00e9soudre les noms locaux<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">3. Exemple c\u00f4t\u00e9 client<\/h4>\n\n\n\n<p>Apr\u00e8s attribution DHCP :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ip a<br>cat \/etc\/resolv.conf<\/code><\/pre>\n\n\n\n<p>Exemple :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nameserver 192.168.1.10<br>search eryann.local<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">4. Important : DHCP ne cr\u00e9e pas automatiquement les entr\u00e9es DNS<\/h4>\n\n\n\n<p>Dans cette configuration :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>le DHCP donne le DNS<\/li>\n\n\n\n<li>mais <strong>n\u2019enregistre pas automatiquement les machines dans BIND<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Pour aller plus loin :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DHCP dynamique (DDNS)<\/li>\n\n\n\n<li>int\u00e9gration DHCP + BIND<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">5. V\u00e9rification c\u00f4t\u00e9 r\u00e9seau<\/h4>\n\n\n\n<p>Test DNS :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ping srv<br>nslookup srv.eryann.local<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Bonnes pratiques<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>utiliser un DNS interne d\u00e9di\u00e9<\/li>\n\n\n\n<li>\u00e9viter les DNS publics en interne<\/li>\n\n\n\n<li>r\u00e9server les IP des serveurs<\/li>\n\n\n\n<li>synchroniser DHCP et DNS<\/li>\n\n\n\n<li>surveiller les baux DHCP<\/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\">R\u00e9capitulatif des fichiers importants<\/h3>\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\/dhcp\/dhcpd.conf<\/td><td>configuration DHCP<\/td><\/tr><tr><td>\/etc\/default\/isc-dhcp-server<\/td><td>interface utilis\u00e9e<\/td><\/tr><tr><td>\/var\/lib\/dhcp\/dhcpd.leases<\/td><td>baux attribu\u00e9s<\/td><\/tr><tr><td>\/etc\/bind\/db.eryann.local<\/td><td>zone DNS (si BIND utilis\u00e9)<\/td><\/tr><tr><td>\/etc\/bind\/named.conf.local<\/td><td>d\u00e9claration zone DNS<\/td><\/tr><tr><td>\/var\/log\/syslog<\/td><td>logs DHCP<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion<\/h3>\n\n\n\n<p>Le DHCP permet d\u2019automatiser compl\u00e8tement la configuration r\u00e9seau des clients.<br>Coupl\u00e9 au DNS, il permet une infrastructure fonctionnelle avec r\u00e9solution de noms.<\/p>\n\n\n\n<p>Cette configuration est une base essentielle avant :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DHCP dynamique (DDNS)<\/li>\n\n\n\n<li>Active Directory<\/li>\n\n\n\n<li>architectures r\u00e9seau avanc\u00e9es<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Pour les \u00e9tudiants en BTS CIEL ou SIO, DHCP et DNS sont \u00e9troitement li\u00e9s.Le serveur DHCP peut automatiquement fournir aux clients : Cette fiche montre une configuration DHCP compl\u00e8te sous Debian avec int\u00e9gration DNS. Configuration compl\u00e8te DHCP + DNS (bloc unique) Explication d\u00e9taill\u00e9e 1. Int\u00e9gration DHCP \/ DNS Le DHCP fournit automatiquement au client : [&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-144","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 dhcp Debian : mise en place d\u2019un serveur ISC DHCP SERVER - 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-dhcp-debian-mise-en-place-dun-serveur-isc-dhcp-server\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fiche dhcp Debian : mise en place d\u2019un serveur ISC DHCP SERVER - Eryann Breizh SecOps\" \/>\n<meta property=\"og:description\" content=\"Pour les \u00e9tudiants en BTS CIEL ou SIO, DHCP et DNS sont \u00e9troitement li\u00e9s.Le serveur DHCP peut automatiquement fournir aux clients : Cette fiche montre une configuration DHCP compl\u00e8te sous Debian avec int\u00e9gration DNS. Configuration compl\u00e8te DHCP + DNS (bloc unique) Explication d\u00e9taill\u00e9e 1. 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