{"id":6161,"date":"2026-11-03T18:00:07","date_gmt":"2026-11-03T18:00:07","guid":{"rendered":"https:\/\/zynoo.com\/blog\/ubuntu-firewall-ufw\/"},"modified":"2026-11-05T20:02:11","modified_gmt":"2026-11-05T20:02:11","slug":"ubuntu-firewall-ufw","status":"publish","type":"post","link":"https:\/\/zynoo.com\/blog\/fr\/ubuntu-firewall-ufw\/","title":{"rendered":"Pare-feu Ubuntu : comment configurer UFW sur un VPS"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Configurer le <strong>pare-feu Ubuntu<\/strong> avec UFW (Uncomplicated Firewall) permet de prot\u00e9ger votre VPS en autorisant les connexions essentielles et en bloquant le trafic entrant inutile. Quelques commandes suffisent, mais leur ordre est important : autorisez SSH <strong>avant<\/strong> d\u2019activer le pare-feu, faute de quoi vous pourriez perdre l\u2019acc\u00e8s \u00e0 distance.<\/p>\n\n<p class=\"wp-block-paragraph\">Ce tutoriel vous montre comment installer UFW, d\u00e9finir des r\u00e8gles par d\u00e9faut s\u00fbres, ouvrir les ports n\u00e9cessaires \u00e0 votre site web, activer le pare-feu, puis g\u00e9rer ses r\u00e8gles.<\/p>\n\n<h2 id=\"h-key-takeaways\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Points_cles_a_retenir\"><\/span>Points cl\u00e9s \u00e0 retenir<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<ul class=\"wp-block-list\">\n<li>UFW permet de g\u00e9rer simplement le pare-feu Ubuntu en ligne de commande.<\/li>\n\n\n\n<li>Autorisez le port SSH que vous utilisez r\u00e9ellement avant d\u2019activer UFW sur un VPS distant.<\/li>\n\n\n\n<li>Bloquez par d\u00e9faut le trafic entrant non sollicit\u00e9, puis ouvrez uniquement les ports n\u00e9cessaires \u00e0 vos services.<\/li>\n\n\n\n<li>V\u00e9rifiez l\u2019acc\u00e8s depuis une seconde connexion et passez les r\u00e8gles en revue chaque fois que vous ajoutez ou supprimez des applications.<\/li>\n<\/ul>\n\n<h2 id=\"h-what-is-ufw-on-ubuntu\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Quest-ce_quUFW_sur_Ubuntu\"><\/span>Qu\u2019est-ce qu\u2019UFW sur Ubuntu ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">UFW est un outil de configuration de pare-feu qui g\u00e8re les r\u00e8gles du syst\u00e8me de filtrage des paquets du noyau Linux. Plut\u00f4t que d\u2019\u00e9crire des r\u00e8gles de bas niveau, vous pouvez autoriser ou refuser des connexions avec des commandes comme <code>ufw allow<\/code> et <code>ufw delete<\/code>.<\/p>\n\n<p class=\"wp-block-paragraph\">Sur un VPS d\u2019h\u00e9bergement web classique, vous autoriserez SSH pour l\u2019administration et les ports 80 et 443 pour les visiteurs. Les ports des bases de donn\u00e9es et des applications internes doivent g\u00e9n\u00e9ralement rester inaccessibles depuis Internet.<\/p>\n\n<h2 id=\"h-before-you-configure-the-ubuntu-firewall\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Avant_de_configurer_le_pare-feu_Ubuntu\"><\/span>Avant de configurer le pare-feu Ubuntu<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Vous aurez besoin d\u2019un VPS Ubuntu avec un acc\u00e8s <code>sudo<\/code> et une connexion SSH fonctionnelle. Si vous d\u00e9butez dans l\u2019administration \u00e0 distance, consultez le guide de ZYNOO sur les <a href=\"https:\/\/zynoo.com\/blog\/fr\/ssh-commands\/\">commandes SSH pour d\u00e9butants<\/a>.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Gardez votre session SSH actuelle ouverte.<\/strong> V\u00e9rifiez que la console web ou de r\u00e9cup\u00e9ration de votre fournisseur de VPS fonctionne. Les pare-feu r\u00e9seau g\u00e9r\u00e9s par le fournisseur sont distincts d\u2019UFW et peuvent \u00e9galement n\u00e9cessiter des r\u00e8gles adapt\u00e9es.<\/p>\n\n<p class=\"wp-block-paragraph\">Ces instructions supposent qu\u2019UFW vient d\u2019\u00eatre install\u00e9 ou qu\u2019il est inactif. Si UFW est d\u00e9j\u00e0 actif, examinez ses r\u00e8gles et les besoins de vos services avant de modifier la politique par d\u00e9faut.<\/p>\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-1024x576.webp\" alt=\"Configuration du pare-feu d\u2019un VPS Ubuntu avec UFW\" class=\"wp-image-6152\" srcset=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-1024x576.webp 1024w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-300x169.webp 300w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-768x432.webp 768w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW-1536x864.webp 1536w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/Ubuntu-VPS-firewall-configuration-using-UFW.webp 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<h2 id=\"h-step-1-check-and-install-ufw\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etape_1_verifier_et_installer_UFW\"><\/span>\u00c9tape 1 : v\u00e9rifier et installer UFW<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">V\u00e9rifiez si UFW est disponible :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw status<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\"><code>Status: inactive<\/code> signifie qu\u2019UFW est install\u00e9, mais n\u2019applique pas de r\u00e8gles. Si la commande est introuvable, installez-le :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo apt update\nsudo apt install ufw<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">N\u2019activez pas encore le pare-feu.<\/p>\n\n<h2 id=\"h-step-2-allow-ssh-before-enabling-ufw\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etape_2_autoriser_SSH_avant_dactiver_UFW\"><\/span>\u00c9tape 2 : autoriser SSH avant d\u2019activer UFW<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Trouvez le port TCP sur lequel SSH \u00e9coute :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ss -ltnp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Comparez le r\u00e9sultat au port utilis\u00e9 par votre client SSH. Le port <strong>22<\/strong> est courant, mais votre VPS peut utiliser un autre port.<\/p>\n\n<p class=\"wp-block-paragraph\">Si SSH utilise le port 22, ex\u00e9cutez :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow 22\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Si SSH utilise en r\u00e9alit\u00e9 un port personnalis\u00e9, comme 2222, autorisez <em>plut\u00f4t<\/em> ce port :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow 2222\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Le port 2222 est un exemple, pas un port suppl\u00e9mentaire que tout le monde devrait ouvrir. Passez en revue les r\u00e8gles en attente :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw show added<\/code><\/pre>\n\n<h2 id=\"h-step-3-set-default-rules-and-check-ipv6\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etape_3_definir_les_regles_par_defaut_et_verifier_IPv6\"><\/span>\u00c9tape 3 : d\u00e9finir les r\u00e8gles par d\u00e9faut et v\u00e9rifier IPv6<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">D\u00e9finissez une politique qui bloque par d\u00e9faut les connexions entrantes, tout en autorisant le VPS \u00e0 \u00e9tablir des connexions sortantes :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw default deny incoming\nsudo ufw default allow outgoing<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Si votre VPS dispose d\u2019une connectivit\u00e9 IPv6 publique, v\u00e9rifiez qu\u2019UFW la prend en charge :<\/p>\n\n<pre class=\"wp-block-code\"><code>grep '^IPV6=' \/etc\/default\/ufw<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Le param\u00e8tre attendu est <code>IPV6=yes<\/code>. Si IPv6 est utilis\u00e9, mais que ce param\u00e8tre est d\u00e9fini sur <code>no<\/code>, modifiez <code>\/etc\/default\/ufw<\/code> pour activer la prise en charge d\u2019IPv6 <strong>avant<\/strong> d\u2019activer le pare-feu.<\/p>\n\n<h2 id=\"h-step-4-open-the-ports-your-website-needs\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etape_4_ouvrir_les_ports_necessaires_a_votre_site_web\"><\/span>\u00c9tape 4 : ouvrir les ports n\u00e9cessaires \u00e0 votre site web<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Si le VPS h\u00e9berge un site web public, autorisez <a href=\"https:\/\/en.wikipedia.org\/wiki\/HTTP\">HTTP<\/a> et HTTPS avant d\u2019activer UFW :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow 80\/tcp\nsudo ufw allow 443\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Voici les ports courants pour un VPS Ubuntu :<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Service<\/th><th>Port<\/th><th>Protocole<\/th><\/tr><tr><td>SSH<\/td><td>22 (ou votre port personnalis\u00e9)<\/td><td>TCP<\/td><\/tr><tr><td>HTTP<\/td><td>80<\/td><td>TCP<\/td><\/tr><tr><td>HTTPS<\/td><td>443<\/td><td>TCP<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">Pour une application publique utilisant un autre port TCP, voici la syntaxe permettant d\u2019autoriser ce port avec UFW :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow 8080\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">N\u2019ex\u00e9cutez cet exemple que si votre service doit \u00eatre accessible de l\u2019ext\u00e9rieur sur le port 8080. Pour un service UDP, indiquez plut\u00f4t <code>\/udp<\/code>, par exemple <code>sudo ufw allow 51820\/udp<\/code> pour un point de terminaison WireGuard configur\u00e9 sur ce port.<\/p>\n\n<p class=\"wp-block-paragraph\">Vous pouvez \u00e9galement consulter les profils d\u2019application disponibles :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw app list<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Si <code>Nginx Full<\/code> figure dans la liste, v\u00e9rifiez ses ports avec <code>sudo ufw app info 'Nginx Full'<\/code>. La commande <code>sudo ufw allow 'Nginx Full'<\/code> peut remplacer les deux r\u00e8gles ci-dessus pour les ports du site web ; il n\u2019est pas n\u00e9cessaire d\u2019utiliser les deux m\u00e9thodes. Les applications derri\u00e8re un <a href=\"https:\/\/zynoo.com\/blog\/fr\/nginx-reverse-proxy-ubuntu\/\">proxy inverse Nginx local<\/a> ne devraient g\u00e9n\u00e9ralement pas exposer publiquement leur port backend.<\/p>\n\n<h2 id=\"h-step-5-enable-ufw-and-verify-the-firewall\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etape_5_activer_UFW_et_verifier_le_pare-feu\"><\/span>\u00c9tape 5 : activer UFW et v\u00e9rifier le pare-feu<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Une fois SSH et tous les ports n\u00e9cessaires \u00e0 vos services autoris\u00e9s, activez UFW :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw enable<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Un avertissement peut indiquer que l\u2019op\u00e9ration risque d\u2019affecter SSH. Ne poursuivez qu\u2019apr\u00e8s avoir v\u00e9rifi\u00e9 votre r\u00e8gle SSH et votre acc\u00e8s \u00e0 la console de r\u00e9cup\u00e9ration. V\u00e9rifiez les r\u00e8gles actives :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw status verbose<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Vous devriez voir <code>Status: active<\/code>, les politiques par d\u00e9faut et les ports autoris\u00e9s. UFW s\u2019activera \u00e9galement au d\u00e9marrage.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Avant de fermer votre session SSH initiale, connectez-vous \u00e0 nouveau depuis un second terminal.<\/strong> Depuis votre ordinateur, utilisez <code>ssh -p 22 username@server-ip<\/code> en rempla\u00e7ant le nom d\u2019utilisateur, l\u2019adresse et le port selon vos besoins. Si vous avez ouvert les ports 80 et 443, testez aussi l\u2019acc\u00e8s \u00e0 votre site web depuis l\u2019ext\u00e9rieur. Une r\u00e8gle <code>ALLOW<\/code> ne suffit pas \u00e0 prouver que le service est accessible.<\/p>\n\n<h2 id=\"h-step-6-manage-restrict-and-delete-ufw-rules\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etape_6_gerer_restreindre_et_supprimer_les_regles_UFW\"><\/span>\u00c9tape 6 : g\u00e9rer, restreindre et supprimer les r\u00e8gles UFW<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Pour afficher les r\u00e8gles du pare-feu avec leurs num\u00e9ros :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw status numbered<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Pour supprimer une ancienne r\u00e8gle d\u2019autorisation, par exemple celle du port TCP 8080 :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw delete allow 8080\/tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Vous pouvez aussi supprimer une r\u00e8gle par son num\u00e9ro (<code>sudo ufw delete 3<\/code>), mais consultez d\u2019abord la liste \u00e0 jour : la num\u00e9rotation peut changer, et la suppression par num\u00e9ro peut ne retirer qu\u2019une seule r\u00e8gle d\u2019une paire IPv4\/IPv6.<\/p>\n\n<h3 id=\"h-optional-restrict-ssh-to-your-ip\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Facultatif_restreindre_SSH_a_votre_adresse_IP\"><\/span>Facultatif : restreindre SSH \u00e0 votre adresse IP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">Si votre adresse IP d\u2019administration est stable, vous pouvez limiter l\u2019acc\u00e8s SSH \u00e0 cette adresse. Par exemple :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw allow from 203.0.113.10 to any port 22 proto tcp<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Remplacez l\u2019adresse IP de l\u2019exemple par votre v\u00e9ritable adresse IP publique. Testez une nouvelle connexion depuis cette adresse, puis supprimez l\u2019ancienne r\u00e8gle g\u00e9n\u00e9rale avec <code>sudo ufw delete allow 22\/tcp<\/code>. <strong>Si vous conservez cette r\u00e8gle g\u00e9n\u00e9rale, tout le monde pourra encore se connecter.<\/strong> Gardez la session initiale et la console de r\u00e9cup\u00e9ration accessibles pendant toute l\u2019op\u00e9ration.<\/p>\n\n<h3 id=\"h-optional-rate-limit-ssh-attempts\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Facultatif_limiter_la_frequence_des_tentatives_de_connexion_SSH\"><\/span>Facultatif : limiter la fr\u00e9quence des tentatives de connexion SSH<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">Autre possibilit\u00e9 : si SSH doit rester accessible depuis des adresses IP changeantes, remplacez la r\u00e8gle d\u2019autorisation g\u00e9n\u00e9rale par une limite de fr\u00e9quence des connexions :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw limit 22\/tcp\nsudo ufw delete allow 22\/tcp\nsudo ufw status numbered<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Ne le faites qu\u2019apr\u00e8s avoir v\u00e9rifi\u00e9 que votre connexion SSH et votre acc\u00e8s \u00e0 la console de r\u00e9cup\u00e9ration fonctionnent. Si votre port SSH n\u2019est pas le 22, utilisez le port r\u00e9el. Testez ensuite une autre connexion. Il s\u2019agit d\u2019une <strong>alternative<\/strong> \u00e0 l\u2019acc\u00e8s limit\u00e9 \u00e0 une seule adresse IP, et non d\u2019une mesure \u00e0 combiner avec lui. La limitation de fr\u00e9quence ne remplace pas l\u2019authentification par cl\u00e9 SSH.<\/p>\n\n<h2 id=\"h-step-7-check-logs-and-troubleshoot-access\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Etape_7_consulter_les_journaux_et_resoudre_les_problemes_dacces\"><\/span>\u00c9tape 7 : consulter les journaux et r\u00e9soudre les probl\u00e8mes d\u2019acc\u00e8s<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Activez la journalisation de base lorsque vous devez examiner du trafic bloqu\u00e9 :<\/p>\n\n<pre class=\"wp-block-code\"><code>sudo ufw logging on\nsudo ufw status verbose<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Selon votre configuration de journalisation, les journaux UFW peuvent se trouver dans le journal syst\u00e8me ou dans <code>\/var\/log\/ufw.log<\/code>.<\/p>\n\n<p class=\"wp-block-paragraph\">Si SSH devient inaccessible, utilisez la <strong>console de r\u00e9cup\u00e9ration<\/strong> de votre fournisseur pour examiner les r\u00e8gles actives. En cas d\u2019urgence, <code>sudo ufw disable<\/code> d\u00e9sactive temporairement l\u2019application des r\u00e8gles ; corrigez ensuite la r\u00e8gle SSH et r\u00e9activez UFW.<\/p>\n\n<p class=\"wp-block-paragraph\">Si votre site web ne se charge pas, v\u00e9rifiez les services \u00e0 l\u2019\u00e9coute avec <code>sudo ss -ltnp<\/code>, les r\u00e8gles UFW et tout pare-feu g\u00e9r\u00e9 par votre fournisseur. Ouvrir un port ne d\u00e9marre pas le service qui l\u2019utilise.<\/p>\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Questions_frequentes\"><\/span>Questions fr\u00e9quentes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1793901025290\"><strong class=\"schema-faq-question\">Le pare-feu Ubuntu d\u00e9marre-t-il automatiquement apr\u00e8s un red\u00e9marrage ?<\/strong> <p class=\"schema-faq-answer\">Oui. Apr\u00e8s l\u2019ex\u00e9cution de sudo ufw enable, UFW sera activ\u00e9 lors des d\u00e9marrages suivants. V\u00e9rifiez sa configuration avec sudo ufw status verbose.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793901239112\"><strong class=\"schema-faq-question\">Dois-je red\u00e9marrer Ubuntu apr\u00e8s avoir modifi\u00e9 les r\u00e8gles UFW ?<\/strong> <p class=\"schema-faq-answer\">Non. Les r\u00e8gles ajout\u00e9es ou supprim\u00e9es avec UFW prennent effet sans red\u00e9marrage du VPS. Vous pouvez examiner imm\u00e9diatement la configuration en cours.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793901250570\"><strong class=\"schema-faq-question\">Le pare-feu UFW prot\u00e8ge-t-il les conteneurs Docker ?<\/strong> <p class=\"schema-faq-answer\">Pas n\u00e9cessairement. Les ports publi\u00e9s par Docker peuvent contourner les r\u00e8gles d\u2019entr\u00e9e habituelles d\u2019UFW, car Docker configure ses propres r\u00e8gles r\u00e9seau. Consultez la documentation de Docker sur les pare-feu avant de compter sur UFW pour restreindre l\u2019acc\u00e8s aux conteneurs.<\/p> <\/div> <\/div>\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Pour configurer un <strong>pare-feu Ubuntu<\/strong> s\u00fbr avec UFW, commencez par autoriser SSH, d\u00e9finissez une politique qui bloque par d\u00e9faut les connexions entrantes et n\u2019ouvrez que les ports n\u00e9cessaires \u00e0 vos applications. Apr\u00e8s avoir activ\u00e9 UFW, v\u00e9rifiez l\u2019acc\u00e8s depuis une autre connexion et supprimez les r\u00e8gles devenues inutiles \u00e0 mesure que votre VPS \u00e9volue.<\/p>\n\n<p class=\"wp-block-paragraph\">UFW g\u00e8re l\u2019acc\u00e8s r\u00e9seau, pas les abus au niveau des applications. Pour les sites web publics utilisant Nginx, la <a href=\"https:\/\/zynoo.com\/blog\/fr\/nginx-rate-limiting\/\">limitation de la fr\u00e9quence des requ\u00eates<\/a> constitue une protection suppl\u00e9mentaire utile.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Configurer le pare-feu Ubuntu avec UFW (Uncomplicated Firewall) permet de prot\u00e9ger votre VPS en autorisant les connexions essentielles et en bloquant le trafic entrant inutile. Quelques commandes suffisent, mais leur ordre est important : autorisez SSH avant d\u2019activer le pare-feu, faute de quoi vous pourriez perdre l\u2019acc\u00e8s \u00e0 distance. Ce tutoriel vous montre comment installer [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":6162,"comment_status":"closed","ping_status":"closed","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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[501],"tags":[],"class_list":["post-6161","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutoriels-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pare-feu Ubuntu : comment configurer UFW sur un VPS<\/title>\n<meta name=\"description\" content=\"Apprenez \u00e0 configurer le pare-feu Ubuntu avec UFW. 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Apr\u00e8s l\u2019ex\u00e9cution de sudo ufw enable, UFW sera activ\u00e9 lors des d\u00e9marrages suivants. V\u00e9rifiez sa configuration avec sudo ufw status verbose.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/zynoo.com\/blog\/fr\/ubuntu-firewall-ufw\/#faq-question-1793901239112","position":2,"url":"https:\/\/zynoo.com\/blog\/fr\/ubuntu-firewall-ufw\/#faq-question-1793901239112","name":"Dois-je red\u00e9marrer Ubuntu apr\u00e8s avoir modifi\u00e9 les r\u00e8gles UFW ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Non. Les r\u00e8gles ajout\u00e9es ou supprim\u00e9es avec UFW prennent effet sans red\u00e9marrage du VPS. Vous pouvez examiner imm\u00e9diatement la configuration en cours.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/zynoo.com\/blog\/fr\/ubuntu-firewall-ufw\/#faq-question-1793901250570","position":3,"url":"https:\/\/zynoo.com\/blog\/fr\/ubuntu-firewall-ufw\/#faq-question-1793901250570","name":"Le pare-feu UFW prot\u00e8ge-t-il les conteneurs Docker ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Pas n\u00e9cessairement. Les ports publi\u00e9s par Docker peuvent contourner les r\u00e8gles d\u2019entr\u00e9e habituelles d\u2019UFW, car Docker configure ses propres r\u00e8gles r\u00e9seau. Consultez la documentation de Docker sur les pare-feu avant de compter sur UFW pour restreindre l\u2019acc\u00e8s aux conteneurs.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"}]}},"_links":{"self":[{"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/posts\/6161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/comments?post=6161"}],"version-history":[{"count":4,"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/posts\/6161\/revisions"}],"predecessor-version":[{"id":6537,"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/posts\/6161\/revisions\/6537"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/media\/6162"}],"wp:attachment":[{"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/media?parent=6161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/categories?post=6161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zynoo.com\/blog\/fr\/wp-json\/wp\/v2\/tags?post=6161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}