Linux on My Noteshttps://my-notes-bf0.pages.dev/docs/linux/Recent content in Linux on My NotesHugoen-us<link>https://my-notes-bf0.pages.dev/docs/linux/basics/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://my-notes-bf0.pages.dev/docs/linux/basics/</guid><description><h3 id="1-view-firewalld-rules">1. <strong>View firewalld rules</strong><a class="anchor" href="#1-view-firewalld-rules" aria-label="Link"></a></h3> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo firewall-cmd --list-all</span></span></code></pre></div><p>To see rules for all zones:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo firewall-cmd --list-all-zones</span></span></code></pre></div><p>To see which zones are active:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo firewall-cmd --get-active-zones</span></span></code></pre></div><p>For a specific zone:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo firewall-cmd --zone<span style="color:#f92672">=</span>public --list-all</span></span></code></pre></div><h3 id="2-open-a-port-temporarily">2. <strong>Open a port temporarily</strong><a class="anchor" href="#2-open-a-port-temporarily" aria-label="Link"></a></h3> <p>This lasts until <code>firewalld</code> is restarted/reloaded or the server reboots.</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo firewall-cmd --add-port<span style="color:#f92672">=</span>8080/tcp</span></span></code></pre></div><p>For UDP:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo firewall-cmd --add-port<span style="color:#f92672">=</span>8080/udp</span></span></code></pre></div><p>For a specific zone:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo firewall-cmd --zone<span style="color:#f92672">=</span>public --add-port<span style="color:#f92672">=</span>8080/tcp</span></span></code></pre></div><h3 id="3-open-a-port-permanently">3. <strong>Open a port permanently</strong><a class="anchor" href="#3-open-a-port-permanently" aria-label="Link"></a></h3> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo firewall-cmd --permanent --add-port<span style="color:#f92672">=</span>8080/tcp </span></span><span style="display:flex;"><span>sudo firewall-cmd --reload</span></span></code></pre></div><p>Verify:</p></description></item></channel></rss>