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<h1 class="post-title">Astuces SSH</h1>
<span class="post-date">27 décembre 2012, dans <a class="no-color" href="category/technologie.html">Technologie</a></span>
<img id="illustration" src="" />
<div class="post article">
<h1>🌟</h1>
<h2 id="tunelling">Tunelling</h2>
<p>Parce que je m'en rapelle jamais (tête de linote):</p>
<div class="highlight"><pre><span></span>$ ssh -f hote -L local:lolnet.org:destination -N
</pre></div>
<h2 id="sshconfig">.ssh/config</h2>
<p>(merci <a href="http://majerti.fr">gaston</a> !)</p>
<p>La directive suivante dans .ssh/config permet de sauter d'hôte en hôte
séparés par des "+" :</p>
<div class="highlight"><pre><span></span><span class="k">Host</span> <span class="o">*+*</span>
<span class="n">ProxyCommand</span> <span class="n">ssh</span> <span class="err">$</span><span class="p">(</span><span class="n">echo</span> <span class="o">%</span><span class="n">h</span> <span class="o">|</span> <span class="n">sed</span>
<span class="s1">&#39;s/+[^+]*$//;s/\([^+%%]*\)%%\([^+]*\)$/\2 -l \1/;s/:/ -p /&#39;</span><span class="p">)</span>
<span class="n">PATH</span><span class="o">=</span><span class="p">.:</span><span class="err">\$</span><span class="n">PATH</span> <span class="n">nc</span> <span class="o">-</span><span class="n">w1</span> <span class="err">$</span><span class="p">(</span><span class="n">echo</span> <span class="o">%</span><span class="n">h</span> <span class="o">|</span> <span class="n">sed</span> <span class="s1">&#39;s/^.*+//;/:/!s/$/ %p/;s/:/ /&#39;</span><span class="p">)</span>
</pre></div>
<p>On peut donc spécifier des "sauts" ssh du style:</p>
<div class="highlight"><pre><span></span><span class="n">ssh</span> <span class="n">root</span><span class="mf">@91.25.25.25</span><span class="o">+</span><span class="mf">192.168.1.1</span>
</pre></div>
<p>Ensuite on peut essayer de rajouter:</p>
<div class="highlight"><pre><span></span><span class="k">Host</span> <span class="o">&lt;</span><span class="n">label_pour_mon_serveur_privé</span><span class="o">&gt;</span>
<span class="k">user</span> <span class="o">&lt;</span><span class="n">monuser</span><span class="p">(</span><span class="n">root</span><span class="p">)</span><span class="o">&gt;</span>
<span class="n">IdentityFile</span> <span class="o">&lt;</span><span class="n">chemin</span> <span class="n">vers</span> <span class="n">ma</span> <span class="n">clé</span> <span class="n">ssh</span> <span class="n">pour</span> <span class="n">le</span> <span class="n">serveur</span> <span class="n">publique</span><span class="o">&gt;</span>
<span class="n">hostname</span> <span class="n">ip_serveur_publique</span><span class="o">+</span><span class="n">ip_serveur_privé</span>
</pre></div>
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