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                <h1 id="installation-de-knot-resolver">Installation de knot-resolver</h1>
<p>Nous allons suivre la documentation officielle située ici : <a href="https://knot-resolver.readthedocs.io/en/stable/quickstart-startup.html">knot-resolver</a></p>
<h2 id="installation">Installation</h2>
<p>Installation du resolver et des programmes utilitaires</p>
<pre><code>pi@piras:~ $ sudo apt install knot-resolver  knot-dnsutils
</code></pre>
<h2 id="configuration">Configuration</h2>
<p>Voilà le contenu de mon fichier de configuration /etc/knot-resolver/kresd.conf :</p>
<pre><code>pi@piras:~ $ cat /etc/knot-resolver/kresd.conf 
-- Default empty Knot DNS Resolver configuration in -*- lua -*-
-- Bind ports as privileged user (root) --
net = { '127.0.0.1', '::1' }
-- Switch to unprivileged user --
user('knot-resolver','knot-resolver')
-- Unprivileged
-- cache.size = 100*MB
pi@piras:~ $
</code></pre>
<p>J'ai dé-commenté les interfaces d'écoute.</p>
<h2 id="lancement-et-mise-en-service-automatique">Lancement et mise en service automatique</h2>
<p>On démarre le service</p>
<pre><code>sudo systemctl start kresd@1.service
</code></pre>
<p>On rend le démarrage automatique</p>
<pre><code>sudo systemctl enable --now kresd@1.service
</code></pre>
<p>On vérifie que le service est en route</p>
<pre><code>sudo systemctl status kresd@1.service

pi@piras:~ $ sudo systemctl status kresd@1.service
● kresd@1.service - Knot Resolver daemon
Loaded: loaded (/lib/systemd/system/kresd@.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2020-12-12 12:24:29 CET; 15min ago
    Docs: man:kresd.systemd(7)
        man:kresd(8)
Main PID: 1905 (kresd)
CGroup: /system.slice/system-kresd.slice/kresd@1.service
        └─1905 /usr/sbin/kresd --config=/etc/knot-resolver/kresd.conf

déc. 12 12:24:28 piras systemd[1]: Starting Knot Resolver daemon...
déc. 12 12:24:29 piras systemd[1]: Started Knot Resolver daemon.
pi@piras:~ $
</code></pre>
<p>Il est actif (active (running))</p>
<p>On teste le fonctionnement</p>
<pre><code>pi@piras:~ $ kdig +short @localhost . NS
a.root-servers.net.
b.root-servers.net.
c.root-servers.net.
d.root-servers.net.
e.root-servers.net.
f.root-servers.net.
g.root-servers.net.
h.root-servers.net.
i.root-servers.net.
j.root-servers.net.
k.root-servers.net.
l.root-servers.net.
m.root-servers.net.
pi@piras:~ $
</code></pre>
<p>Tout fonctionne :D le résolveur écoute sur les ports 127.0.0.1 et ::1.</p>
<h2 id="modification-de-etcdhcpcdconf">Modification de /etc/dhcpcd.conf</h2>
<p>Nous allons pouvoir maintenant modifier la ligne :</p>
<pre><code>#static domain_name_servers=192.168.1.1
</code></pre>
<p>pour obtenir ceci :</p>
<pre><code>static domain_name_servers=127.0.0.1 ::1
</code></pre>
<p>Notre raspi fera appel dorénavant à son propre résolveur DNS (et non à celui de votre box !)</p>
              
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