{"id":2275,"date":"2022-08-28T20:06:39","date_gmt":"2022-08-28T20:06:39","guid":{"rendered":"https:\/\/www.webhi.com\/how-to\/?p=2275"},"modified":"2022-08-28T20:06:40","modified_gmt":"2022-08-28T20:06:40","slug":"comment-securiser-ssh-sur-les-serveurs-linux-ubuntu-centos-fedora","status":"publish","type":"post","link":"https:\/\/www.webhi.com\/how-to\/fr\/comment-securiser-ssh-sur-les-serveurs-linux-ubuntu-centos-fedora\/","title":{"rendered":"Comment S\u00e9curiser SSH sur les serveurs Linux Ubuntu\/Centos\/Fedora"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/08\/secure_ssh_linux_fr.jpg\" alt=\"S\u00e9curis\u00e9 SSH sur les serveurs Linux\nUbuntu\/Centos\/Fedora\" class=\"wp-image-2276\" srcset=\"https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/08\/secure_ssh_linux_fr.jpg 1200w, https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/08\/secure_ssh_linux_fr-300x169.jpg 300w, https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/08\/secure_ssh_linux_fr-1024x576.jpg 1024w, https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/08\/secure_ssh_linux_fr-768x432.jpg 768w, https:\/\/www.webhi.com\/how-to\/gilrogre\/2022\/08\/secure_ssh_linux_fr-150x84.jpg 150w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Qu\u2019est-ce que SSH ?<\/h2>\n\n\n\n<p>Le protocole <strong>Secure Shell (SSH)<\/strong> est un protocole de r\u00e9seau cryptographique pour l\u2019exploitation s\u00e9curis\u00e9e de services de r\u00e9seau sur un r\u00e9seau non s\u00e9curis\u00e9.&nbsp; Ses applications les plus remarquables sont la connexion \u00e0 distance et l\u2019ex\u00e9cution en ligne de commande.<\/p>\n\n\n\n<p>Un programme client SSH est g\u00e9n\u00e9ralement utilis\u00e9 pour \u00e9tablir des connexions \u00e0 un d\u00e9mon SSH acceptant les connexions distantes. Les deux sont couramment pr\u00e9sents sur la plupart des syst\u00e8mes d\u2019exploitation modernes, y compris macOS, Linux, OpenBSD, FreeBSD\u2026<\/p>\n\n\n\n<p>Dans ce guide, vous allez s\u00e9curiser le port SSH et d\u00e9sactiver la connexion de l\u2019utilisateur root.<\/p>\n\n\n\n<p>Le fichier de configuration se trouve dans <strong><code>\/etc\/ssh\/sshd_config<\/code><\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00c9tape 1&nbsp;: Modification du port SSH<\/h2>\n\n\n\n<p>La majorit\u00e9 des scripts d\u2019attaque n\u2019utilisent que le <kbd>port 22<\/kbd>, qui est le port SSH standard par d\u00e9faut. Par cons\u00e9quent, changer le port SSH par d\u00e9faut devrait offrir une couche de protection suppl\u00e9mentaire.<\/p>\n\n\n\n<p>Ouvrir le fichier de configuration et modifier <kbd>Port 22<\/kbd> \u00e0 <kbd>Port 2445<\/kbd>.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">...\n# The strategy used for options in the default sshd_config shipped with\n# OpenSSH is to specify options with their default value where\n# possible, but leave them commented.  Uncommented options override the\n# default value.\n\nInclude \/etc\/ssh\/sshd_config.d\/*.conf\n\n<s>Port 22<\/s>\n<strong>Port 2445<\/strong>\n#AddressFamily any\n#ListenAddress 0.0.0.0\n#ListenAddress ::\n...<\/pre>\n\n\n\n<p>Vous devez garder le num\u00e9ro de port \u00e0 l\u2019esprit ou l\u2019\u00e9crire si vous voulez utiliser SSH pour acc\u00e9der \u00e0 vos serveurs.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Red\u00e9marrez le serveur <kbd>OpenSSH<\/kbd>.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">Dans&nbsp;Debian \/ Ubuntu&nbsp;Linux:<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ sudo service ssh restart\n# using systemd:\n$ sudo systemctl restart ssh<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">CentOS \/ RHEL \/ Fedora \/ Redhat Linux:<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ sudo service sshd restart\n# using systemd:\n$ sudo systemctl restart sshd<\/code><\/pre>\n\n\n\n<p>Maintenant pour se connecter \u00e0 notre serveur ssh, nous ajoutons <kbd>-p<\/kbd> param\u00e8tre avec le nouveau num\u00e9ro de port <kbd>2445<\/kbd>.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ ssh root@SERVER_IP -p 2445<\/code><\/pre>\n\n\n\n<p>Ensuite, nous d\u00e9sactivons la connexion root.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00c9tape 2&nbsp;: D\u00e9sactiver la connexion root via SSH<\/h2>\n\n\n\n<p>Si vous n\u2019avez pas d\u00e9j\u00e0 un utilisateur Sudo activ\u00e9, vous pouvez suivre notre guide sur <a href=\"https:\/\/www.webhi.com\/how-to\/fr\/?p=2182\">Cr\u00e9er un nouvel utilisateur compatible sudo<\/a><\/p>\n\n\n\n<p>Utilisez l\u2019utilisateur sudo que vous avez ajout\u00e9 \u00e0 votre machine plut\u00f4t que root pour vous connecter au serveur via SSH si vous en avez.<\/p>\n\n\n\n<p>en changeant la <kbd>PermitRootLogin<\/kbd> et le param\u00e9trer sur non, vous emp\u00eacherez la connexion root&nbsp;:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">...\n# Authentication:\n\n#LoginGraceTime 2m\n<s>PermitRootLogin yes<\/s>\n<strong>PermitRootLogin no<\/strong>\n#StrictModes yes\n#MaxAuthTries 6\n#MaxSessions 10\n\n#PubkeyAuthentication yes\n...<\/pre>\n\n\n\n<p>Red\u00e9marrez le serveur SSH, et vous devriez maintenant \u00eatre en mesure de vous connecter \u00e0 notre serveur comme suit&nbsp;:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"bash\" class=\"language-bash\">$ ssh bob@SERVER_IP -p 2445\n# To switch to root user use:\n$ sudo su\n[sudo] password for bob:<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u00c9tape 3&nbsp;: D\u00e9sactiver la connexion SSH par mot de passe<\/h2>\n\n\n\n<p>Pour se d\u00e9barrasser des attaques par force brute constantes, vous pouvez opter pour une connexion SSH uniquement bas\u00e9e sur la cl\u00e9.<\/p>\n\n\n\n<p>Suivez notre guide sur <a href=\"https:\/\/www.webhi.com\/how-to\/how-to-use-a-private-key-for-ssh-authentication\/\"><a href=\"https:\/\/www.webhi.com\/how-to\/fr\/comment-utiliser-une-cle-privee-pour-lauthentification-ssh\/\">Comment utiliser une cl\u00e9 priv\u00e9e pour l\u2019authentification SSH <\/a><\/a>.<\/p>\n\n\n\n<p>Les \u00e9l\u00e9ments suivants doivent \u00eatre pris en compte avant de proc\u00e9der :<\/p>\n\n\n\n<ol><li><strong>Pour vous assurer que vous pouvez au moins vous connecter au serveur, assurez-vous de cr\u00e9er votre paire de cl\u00e9s SSH sur votre ordinateur personnel ou professionnel et ajoutez cette cl\u00e9 SSH publique au serveur.<\/strong><\/li><li><strong>Lorsque l\u2019authentification par mot de passe est d\u00e9sactiv\u00e9e, les machines non autoris\u00e9es ne peuvent pas ssh sur votre serveur.<\/strong><\/li><li><strong>Vous ne pourrez plus acc\u00e9der \u00e0 votre serveur si vous \u00eates verrouill\u00e9.<\/strong><\/li><\/ol>\n\n\n\n<p>Vous \u00eates maintenant conscient des dangers li\u00e9s \u00e0 la suppression des connexions SSH par mot de passe.<\/p>\n\n\n\n<p>voyons comment le faire.<\/p>\n\n\n\n<p>D\u00e9sactiver l\u2019authentification du mot de passe, en modifiant <kbd>PasswordAuthentication<\/kbd> param\u00e9trer sur non, vous emp\u00eacherez la connexion par mot de passe&nbsp;:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">...\n\n# To disable tunneled clear text passwords, change to no here!\n<s>PasswordAuthentication yes<\/s>\n\n<strong>PasswordAuthentication no<\/strong>\n#PermitEmptyPasswords no\n\n...<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>Nous avons fourni une liste de techniques de fortification SSH utiles. Bien s\u00fbr, il existe un certain nombre d\u2019autres techniques pour prot\u00e9ger SSH et votre serveur Linux. Il est impossible de fournir une liste compl\u00e8te dans un seul article. Veuillez v\u00e9rifier les autres articles dans la section &#8220;s\u00e9curit\u00e9&#8221; pour plus de tutoriels afin de renforcer la s\u00e9curit\u00e9 de vos serveurs.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qu\u2019est-ce que SSH ? Le protocole Secure Shell (SSH) est un protocole de r\u00e9seau cryptographique pour l\u2019exploitation s\u00e9curis\u00e9e de services de r\u00e9seau sur un r\u00e9seau non s\u00e9curis\u00e9.&nbsp; Ses applications les plus remarquables sont la connexion \u00e0 distance et l\u2019ex\u00e9cution en ligne de commande. Un programme client SSH est g\u00e9n\u00e9ralement utilis\u00e9 pour \u00e9tablir des connexions \u00e0 ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/www.webhi.com\/how-to\/fr\/comment-securiser-ssh-sur-les-serveurs-linux-ubuntu-centos-fedora\/\" 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 S\u00e9curiser SSH sur les serveurs Linux Ubuntu\/Centos\/Fedora - WebHi Tutorials &amp; Documentations<\/title>\n<meta name=\"description\" content=\"Dans ce guide, vous allez s\u00e9curiser le port SSH et d\u00e9sactiver la connexion de l\u2019utilisateur root.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.webhi.com\/how-to\/fr\/comment-securiser-ssh-sur-les-serveurs-linux-ubuntu-centos-fedora\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comment S\u00e9curiser SSH sur les serveurs Linux Ubuntu\/Centos\/Fedora - WebHi Tutorials &amp; 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