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<title> SFTP jail en OpenSSH
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<h1>
<a href="https://frommelmak.com/sftp-jail-en-openssh.html" rel="bookmark" title="Permalink to SFTP jail en OpenSSH"><span class="caps">SFTP</span> jail en OpenSSH</a>
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<p>Las versiones recientes de OpenSSH facilitan la tarea de enjaular a los usuarios dentro de su home al acceder por <span class="caps">SFTP</span>. Para ello podemos utilizar la directivas <code>Match</code> y <code>ChrootDirectory</code> que permiten sobreescribir las opciones globales de configuración para un grupo, usuario, host o <span class="caps">IP</span> determinados.</p>
<p>Ejemplo <code>sshd_config</code>:</p>
<div class="highlight pygments-style-monokai rounded shadow-sm mb-3"><pre><span></span><code><span class="go">Subsystem sftp internal-sftp</span>
<span class="go">Match user pepeuser</span>
<span class="go"> ChrootDirectory /path/to/some_place</span>
<span class="go"> X11Forwarding no</span>
<span class="go"> AllowTcpForwarding no</span>
<span class="go"> ForceCommand internal-sftp</span>
</code></pre></div>
<p><strong>Nota</strong>: el home de <code>pepeuser</code> ha de ser la raiz del sistema <code>/</code> ya que esta será relativa al <code>ChrootDirectory</code> especificado para ese <em>user</em> en <code>sshd_config</code>. </p>
<p>El <em>shell</em> para ese user puede ser <code>/bin/false</code> para evitar accesos via ssh para ese user.</p>
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