/tags/duckdns/ Recent content in Duckdns on SQP Dev Hugo en-gb Sun, 10 May 2026 00:00:00 +0000 /posts/2026-05-10-adding-https-with-caddy-and-duckdns/ Sun, 10 May 2026 00:00:00 +0000 /posts/2026-05-10-adding-https-with-caddy-and-duckdns/ <h1 id="adding-https-with-caddy-and-duckdns">Adding HTTPS with Caddy and DuckDNS</h1> <p>After deploying the application to EC2, it initially worked only through:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-text" data-lang="text"><span style="display:flex;"><span>http://EC2-IP </span></span></code></pre></div><p>The next step was understanding how HTTPS is normally added.</p> <h2 id="the-stack">The Stack</h2> <p>I used:</p> <ul> <li>DuckDNS for a free test domain</li> <li>Caddy as a reverse proxy</li> <li>Let&rsquo;s Encrypt certificates managed automatically by Caddy</li> </ul> <p>Final setup:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-text" data-lang="text"><span style="display:flex;"><span>https://dsuopd.duckdns.org </span></span></code></pre></div><h2 id="architecture">Architecture</h2> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-text" data-lang="text"><span style="display:flex;"><span>Internet </span></span><span style="display:flex;"><span> ↓ </span></span><span style="display:flex;"><span>Caddy </span></span><span style="display:flex;"><span> ↓ </span></span><span style="display:flex;"><span>localhost:3000 </span></span><span style="display:flex;"><span> ↓ </span></span><span style="display:flex;"><span>Docker app container </span></span></code></pre></div><p>The application container itself is no longer publicly exposed directly.</p>