diff --git a/docs/tutorial/domainname.rst b/docs/tutorial/domainname.rst
index ad00b667f..9e23c1253 100644
--- a/docs/tutorial/domainname.rst
+++ b/docs/tutorial/domainname.rst
@@ -272,15 +272,110 @@ A variable with type `port`
           git checkout v1.1_032
 
 
-We will add, according to our use case, a variable of type `port`:
+After the `address` variable let's add, according to our use case,
 
 .. image:: images/firefox_port.png
 
+a new variable of type `port`. Our structure file looks like this:
 
+.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_032/firefox/10-manual.yml
+   :language: yaml
+   :caption: The `port` type variable in the :file:`firefox/10-manual.yml` structure file
+   :linenos:
+..
+    port:
+      description: HTTP Port
+      type: port
+      default: 8080
+
+:tutorial:`Download this file from the rougail-tutorials git repository <src/tag/v1.1_032/firefox/10-manual.yml>`
+
+Let's assing a value to this port: 
+
+.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_032/config/02/config.yml
+   :language: yaml
+   :caption: A user data :file:`config/02/config.yml` setting a value to the port variable
+
+.. 
+    proxy_mode: Manual proxy configuration
+    manual:
+      http_proxy:
+        address: example.net
+        port: 3128
+        
+:tutorial:`Download this file from the rougail-tutorials git repository <src/tag/v1.1_032/config/02/config.yml>`
+
+If we launch the rougail CLI: 
+
+.. raw:: html
+   :class: terminal
+   :url: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_032/config/02/cmd_ro.txt
+
+We have this output: 
+
+.. raw:: html
+   :class: output
+   :url: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_032/config/02/output_ro.html
+   
+..
+    <pre>╭─────────────────────────── Caption ────────────────────────────╮
+    │ Variable                           <span style="color: #00aa00">Modified value</span>              │
+    │ <span style="color: #ff0000">Undocumented but modified variable</span> (⏳ Original default value) │
+    ╰────────────────────────────────────────────────────────────────╯
+    Variables:
+    <span style="color: #5c5cff">┣━━ </span>📓 <span style="color: #ff0000">Configure Proxy Access to the Internet</span>: <span style="color: #00aa00">Manual proxy configuration</span> ◀ 
+    <span style="color: #5c5cff">┃   </span>loaded from the YAML file "config/02/config.yml" (⏳ No proxy)
+    <span style="color: #5c5cff">┗━━ </span>📂 Manual proxy configuration
+    <span style="color: #5c5cff">    </span><span style="color: #5c5cff">┗━━ </span>📂 HTTP Proxy
+    <span style="color: #5c5cff">    </span><span style="color: #5c5cff">    </span><span style="color: #5c5cff">┣━━ </span>📓 <span style="color: #ff0000">HTTP address</span>: <span style="color: #00aa00">example.net</span> ◀ loaded from the YAML file 
+    <span style="color: #5c5cff">    </span><span style="color: #5c5cff">    </span><span style="color: #5c5cff">┃   </span>"config/02/config.yml"
+    <span style="color: #5c5cff">    </span><span style="color: #5c5cff">    </span><span style="color: #5c5cff">┗━━ </span>📓 <span style="color: #ff0000">HTTP Port</span>: <span style="color: #00aa00">3128</span> ◀ loaded from the YAML file 
+    <span style="color: #5c5cff">    </span><span style="color: #5c5cff">    </span><span style="color: #5c5cff">    </span>"config/02/config.yml" (⏳ 8080)
+    </pre>
+   
+How can we know what validations the port type performs on the value assigned to the variable?
+
+There are a number of validations that are carried out with this `port` type:
+
+- well-known ports (1 to 1023) are allowed
+- registred ports (1024 to 49151) are allowed
+
+.. - private ports (greater than 49152) are allowed
+
+Now let's assign a value that is outside the allowed ports:
+
+.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_032/config/03/config.yml
+   :language: yaml 
+   :caption: A user value in :file:`config/03/config.yml` that is not allowed
+
+:tutorial:`Download this file from the rougail-tutorials git repository <src/tag/v1.1_032/config/03/config.yml>`
+
+Again, we launch the rougail CLI:
+
+.. raw:: html
+   :class: terminal
+   :url: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_032/config/03/cmd_invalid.txt
+   
+.. rougail -m firefox/ -u yaml -yf config/03/config.yml --cli.invalid_user_datas_error
+
+And we have this output:    
+
+.. raw:: html
+   :class: error
+   :url: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_032/config/03/output_invalid.html
+
+.. 
+    <pre><span style="font-weight: bold; color: #ff0000">🛑 ERRORS</span>
+    <span style="color: #ff0000">┗━━ </span>the value "100000" is an invalid port for "manual.http_proxy.port" (HTTP 
+    <span style="color: #ff0000">    </span>Port), must be between 1 and 65535, it will be ignored when loading from the
+    <span style="color: #ff0000">    </span>YAML file "config/03/config.yml"
+    </pre>
+   
+We observe that, as with the `domainname` type, a number of validations are performed 
+to ensure that the value assigned to this variable conforms to the `port` type.
+   
 .. keypoints:: let's review the key points
 
-    **Keywords**
-    
-    - we can set a `domainname` type to a variable
-    - we can add :term:`parameter`\ s to variables to refine their typing behavior
-    
+    - we can assign a `domainname` type to a variable
+    - we can set a :term:`parameter` to a `domainname` variable to refine their typing behavior
+    - we can assign a `port` type to a variable