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                <p class="caption"><span class="caption-text">Installation d'un VPS</span></p>
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                <h1 id="resume">Résumé</h1>
<h1 id="objectif">Objectif</h1>
<p>Les serveurs DNS sont le nerf de la guerre : sans eux, pas d'Internet. Ils assurent la correspondance nom-de-machine ⬄ adresse IP.</p>
<p>Il est toujours possible d'utiliser les serveurs DNS du fournisseur de noms de domaine, mais avoir le sien propre permet d'ajouter des options qui ne sont pas toujours disponibles de primeabord: <strong>dane</strong>, <strong>dnssec</strong>. </p>
<p>Cela permet aussi d'implémenter des solutions qui sont expérimentales, comme <strong>doh</strong> et <strong>dot</strong>. Celles-ci permettent une meilleure anonymisation des requêtes.</p>
<p>Nous allons suivre le même plan que pour nos autres serveurs, avec les spécificités des <strong>VPS</strong>.</p>
<h2 id="table-des-matieres">Table des matières</h2>
<ol>
<li>Présentation</li>
<li>Commande du <strong>VPS</strong></li>
<li>Première connexion</li>
<li>État des lieux</li>
<li>Sécurisation <strong>ssh</strong></li>
<li>Installation d'un serveur de temps : <strong>ntp</strong></li>
<li>Installation d'une protection contre les attaques de force brute : <strong>fail2ban</strong></li>
<li>Installation d'un programme de surveillance : <strong>logwatch</strong></li>
<li>Installation d'un serveur de courrier basique : <strong>postfix</strong></li>
<li>Installation d'un serveur principal <strong>DNS</strong> : <strong>knot</strong></li>
<li>Installation d'un serveur <strong>DNS</strong> secondaire : toujours <strong>knot</strong></li>
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