ufw.php

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<section>
<h2>4. Firewall (ufw)</h2>

<h3>4.1 Installation</h3>
<pre><code>apt-get install -y ufw</code></pre>

<h3>4.2 Konfiguration</h3>
<pre><code>ufw default deny incoming
ufw default allow outgoing
ufw allow 2022/tcp comment 'SSH'
ufw allow 80/tcp comment 'HTTP'
ufw allow 443/tcp comment 'HTTPS'
ufw --force enable</code></pre>

<h3>4.3 Status pruefen</h3>
<pre><code>ufw status verbose</code></pre>

<h3>4.4 Aktuelle Regeln</h3>
<ul>
    <li><strong>2022/tcp:</strong> SSH</li>
    <li><strong>80/tcp:</strong> HTTP</li>
    <li><strong>443/tcp:</strong> HTTPS</li>
</ul>
</section>

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