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                <p class="caption"><span class="caption-text">Installation d'un VPS</span></p>
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                <h1 id="premiere-connexion">Première connexion</h1>
<p>Veuillez vous reporter au tutoriel «Installation d'un serveur Raspi sécurisé» pour la création de votre clef, ainsi que la configuration du poste de travail.</p>
<p>Une fois les opérations effectuées, vous pourrez vous connecter ainsi :</p>
<pre><code>eric@aldebaran:~$ ssh ns1
The authenticity of host 'ns1.yojik.eu (51.210.247.149)' can't be established.
ECDSA key fingerprint is SHA256:WlxCIvGD41/N+ef9u5R4bL6+L3Kywar8EW32bH/ck5w.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'ns1.yojik.eu,51.210.247.149' (ECDSA) to the list of known hosts.
Linux vps-0c47118c 4.19.0-12-cloud-amd64 #1 SMP Debian 4.19.152-1 (2020-10-18) x86_64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Sat Jan  2 09:03:38 2021 from 82.65.37.204
debian@vps-0c47118c:~$
</code></pre>
<p>Nous voilà connectés.</p>
<p>Nous voyons que le hostname est celui donné par défaut par OVH : nous le changerons.</p>
<p>Il faudra aussi procéder  à la sécurisation du serveur <strong>SSH</strong>.</p>
<p>Nous allons installer quelques logiciels indispensables (pour moi) :</p>
<ul>
<li>mc - navigateur de fichier en mode texte</li>
<li>vim - éditeur de texte</li>
</ul>
<p>Ensuite, nous allons procéder à la configuration de notre hostname, du réseau (IPV6), à l'installation du résolveur DNS (knot-resolver), d'un pare-feux (firewalld), d'un programme nous protégant des attaques de force brute (fail2ban), d'un programme de surveillance de notre serveur et d'un serveur de temps.</p>
<p>Une fois tout cela fait et testé, nous pourrons procéder à l'installation et à la configuration d'un serveur <strong>DNS</strong>, <strong>knot</strong> dans mon cas. J'installais toujours <strong>bind</strong>, mais j'ai décidé de changer, pour éviter la monotonie et apprendre des choses nouvelles.</p>
<p>Les première étapes ont toutes été décrites dans mes précédents tutoriels. Je vais simplement reprendre les explications adaptées au cas particulier du vps.</p>
              
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