{"id":3014,"date":"2022-10-17T21:45:03","date_gmt":"2022-10-17T21:45:03","guid":{"rendered":"https:\/\/www.webhi.com\/how-to\/?p=3014"},"modified":"2022-10-17T21:45:05","modified_gmt":"2022-10-17T21:45:05","slug":"comment-utiliser-les-regles-de-pare-feu-iptables-sous-linux","status":"publish","type":"post","link":"https:\/\/www.webhi.com\/how-to\/fr\/comment-utiliser-les-regles-de-pare-feu-iptables-sous-linux\/","title":{"rendered":"Comment utiliser les r\u00e8gles de pare-feu d&#8217;iptables sous Linux"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/10\/iptables_fr.jpg\" alt=\"R\u00e8gles de pare-feu sur Linux tutoriel guide linux ubuntu debian fedora centos redhat rhel suse\" class=\"wp-image-3015\" srcset=\"https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/10\/iptables_fr.jpg 1920w, https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/10\/iptables_fr-300x169.jpg 300w, https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/10\/iptables_fr-1024x576.jpg 1024w, https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/10\/iptables_fr-768x432.jpg 768w, https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/10\/iptables_fr-1536x864.jpg 1536w, https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/10\/iptables_fr-150x84.jpg 150w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"introduction\">Introduction<\/h2>\n\n\n\n<p>Iptables est un utilitaire Linux puissant qui permet aux administrateurs syst\u00e8me de configurer le pare-feu int\u00e9gr\u00e9 du noyau. Iptables utilise un ensemble de r\u00e8gles pour d\u00e9terminer comment filtrer le trafic r\u00e9seau. Chaque r\u00e8gle pr\u00e9cise quel type de trafic \u00e0 filtrer et quelle action \u00e0 prendre sur le trafic correspondant.<\/p>\n\n\n\n<p>Dans ce guide, nous aborderons quelques r\u00e8gles et commandes Iptables de base pour aider \u00e0 s\u00e9curiser votre serveur. Par d\u00e9faut, Iptables bloque tout le trafic entrant et autorise tout le trafic sortant. Ce n\u2019est pas tr\u00e8s s\u00e9curis\u00e9, nous devrons donc ajouter quelques r\u00e8gles pour rendre notre serveur plus s\u00e9curis\u00e9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"prerequisites\">Syntaxe de base<\/h2>\n\n\n\n<p>Avant de commencer, passons en revue la syntaxe de base pour iptables. La syntaxe g\u00e9n\u00e9rale pour iptables est la suivante&nbsp;:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -A &lt;chain&gt; -p &lt;protocol&gt; -s &lt;source&gt; -d &lt;destination&gt; -j &lt;action&gt;<\/code><\/pre>\n\n\n\n<p>Where:<\/p>\n\n\n\n<ul><li><code>&lt;chain&gt;<\/code>&nbsp;est le nom de la cha\u00eene (expliqu\u00e9 ci-dessous).<\/li><li><code>&lt;protocol&gt;<\/code>&nbsp;est le protocole du trafic (g\u00e9n\u00e9ralement TCP, UDP ou ICMP).<\/li><li><code>&lt;source&gt;<\/code>&nbsp;est l\u2019adresse IP source.<\/li><li><code>&lt;destination&gt;<\/code>&nbsp;est l\u2019adresse IP de destination.<\/li><li><code>&lt;action&gt;<\/code>&nbsp;est l\u2019action \u00e0 prendre (g\u00e9n\u00e9ralement ACCEPTER ou D\u00c9POSER).<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"chains\">cha\u00eenes<\/h4>\n\n\n\n<p>Les cha\u00eenes sont utilis\u00e9es pour regrouper les r\u00e8gles iptables associ\u00e9es. Il y a trois cha\u00eenes int\u00e9gr\u00e9es&nbsp;:<\/p>\n\n\n\n<ul><li><code>INPUT<\/code>: pour le trafic entrant.<\/li><li><code>OUTPUT<\/code>: pour le trafic sortant.<\/li><li><code>FORWARD<\/code> : dans le cas de trafic achemin\u00e9 d\u2019un r\u00e9seau \u00e0 un autre.<\/li><\/ul>\n\n\n\n<p>Ou vous cr\u00e9ez \u00e9galement nos propres cha\u00eenes personnalis\u00e9es.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"actions\">Actions<\/h4>\n\n\n\n<p>Il y a deux actions principales que nous pouvons faire avec iptables&nbsp;: ACCEPT et DROP.<\/p>\n\n\n\n<ul><li>ACCEPT: permet le trafic \u00e0 travers.<\/li><li>DROP: bloque la circulation.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"basic-rules\">Commandes de base<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"listing-rules\">Lister les r\u00e8gles<\/h3>\n\n\n\n<p>Le <code>iptables -L<\/code>&nbsp;est utilis\u00e9 pour lister toutes les r\u00e8gles d\u2019une cha\u00eene.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -L\n\nChain INPUT (policy ACCEPT)\ntarget     prot opt source               destination         \n\nChain FORWARD (policy ACCEPT)\ntarget     prot opt source               destination         \n\nChain OUTPUT (policy ACCEPT)\ntarget     prot opt source               destination   \n<\/code><\/pre>\n\n\n\n<p>Le&nbsp;<code>-v<\/code>&nbsp;option est utilis\u00e9e pour lister les r\u00e8gles avec la sortie verbeuse.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -L -v\n\nChain INPUT (policy ACCEPT 0 packets, 0 bytes)\n pkts bytes target     prot opt in     out     source               destination         \n\nChain FORWARD (policy ACCEPT 0 packets, 0 bytes)\n pkts bytes target     prot opt in     out     source               destination         \n\nChain OUTPUT (policy ACCEPT 0 packets, 0 bytes)\n pkts bytes target     prot opt in     out     source               destination  <\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"adding-rules\">Ajouter des r\u00e8gles<\/h3>\n\n\n\n<p>Le&nbsp;<code>iptables -A<\/code>&nbsp;est utilis\u00e9 pour ajouter une r\u00e8gle en fin de cha\u00eene.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -A INPUT -s 192.168.1.0\/24 -j ACCEPT<\/code><\/pre>\n\n\n\n<p>Le&nbsp;<code>-I<\/code>&nbsp;option est utilis\u00e9e pour ajouter une r\u00e8gle \u00e0 la position sp\u00e9cifi\u00e9e dans une cha\u00eene.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -I INPUT 2 -s 192.168.1.0\/24 -j ACCEPT<\/code><\/pre>\n\n\n\n<p>Le&nbsp;<code>-p<\/code>&nbsp;option est utilis\u00e9e pour sp\u00e9cifier le protocole et l\u2019option <code>--dport<\/code> est utilis\u00e9e pour sp\u00e9cifier le port de destination.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -A INPUT -p tcp --dport 22 -j ACCEPT<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"deleting-rules\">Suppression de r\u00e8gles<\/h3>\n\n\n\n<p>Le&nbsp;<code>iptables -D<\/code>&nbsp;est utilis\u00e9 pour supprimer une r\u00e8gle \u00e0 la position sp\u00e9cifi\u00e9e dans une cha\u00eene.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -D INPUT 2<\/code><\/pre>\n\n\n\n<p><code>-F<\/code>&nbsp;: option is used for deleting all the rules in a chain.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -F INPUT<\/code><\/pre>\n\n\n\n<p><code>-X<\/code>&nbsp; : L\u2019option est utilis\u00e9e pour supprimer une cha\u00eene d\u00e9finie par l\u2019utilisateur.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -X mychain<\/code><\/pre>\n\n\n\n<p><code>-P<\/code> Cette option est utilis\u00e9e pour sp\u00e9cifier la strat\u00e9gie par d\u00e9faut pour une cha\u00eene.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables -P INPUT DROP<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"saving-rules\">Sauvegarder des r\u00e8gles<\/h3>\n\n\n\n<p>Le&nbsp;<code>iptables-save<\/code>&nbsp;est utilis\u00e9 pour enregistrer les r\u00e8gles actuelles d\u2019iptables.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables-save &gt; \/etc\/iptables.rules<\/code><\/pre>\n\n\n\n<p>Le&nbsp;<code>iptables-restore<\/code>&nbsp;est utilis\u00e9 pour restaurer les r\u00e8gles iptables sauvegard\u00e9es.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ iptables-restore &lt; \/etc\/iptables.rules<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\">Conclusion<\/h2>\n\n\n\n<p>Dans ce guide, nous avons appris comment lister, supprimer, enregistrer et restaurer les r\u00e8gles iptables.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Iptables est un utilitaire Linux puissant qui permet aux administrateurs syst\u00e8me de configurer le pare-feu int\u00e9gr\u00e9 du noyau. Iptables utilise un ensemble de r\u00e8gles pour d\u00e9terminer comment filtrer le trafic r\u00e9seau. Chaque r\u00e8gle pr\u00e9cise quel type de trafic \u00e0 filtrer et quelle action \u00e0 prendre sur le trafic correspondant. Dans ce guide, nous aborderons ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/www.webhi.com\/how-to\/fr\/comment-utiliser-les-regles-de-pare-feu-iptables-sous-linux\/\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[67,31],"tags":[],"yoast_head":"\n<title>Comment utiliser les r\u00e8gles de pare-feu d&#039;iptables sous Linux - WebHi Tutorials &amp; Documentations<\/title>\n<meta name=\"description\" content=\"Dans ce guide, nous aborderons quelques r\u00e8gles et commandes iptables de base pour aider \u00e0 s\u00e9curiser votre serveur. 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