diff --git a/README.md b/README.md
index 45e7bd95..f79b81a4 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,9 @@
 - [Summary](https://forge.cloud.silique.fr/stove/rougail-tutorials/src/branch/1.1/README.md)
-- [[tutorial v1.1_022] Putting a variable inside of a family or a sub family](https://forge.cloud.silique.fr/stove/rougail-tutorials/src/commit/v1.1_022/README.md) ([diff](https://forge.cloud.silique.fr/stove/rougail-tutorials/compare/v1.1_022~1..v1.1_022))
+- [[tutorial v1.1_023] A variable with type "domainname"](https://forge.cloud.silique.fr/stove/rougail-tutorials/src/commit/v1.1_023/README.md) ([diff](https://forge.cloud.silique.fr/stove/rougail-tutorials/compare/v1.1_023~1..v1.1_023))
 
-# [tutorial v1.1_023)] A variable with type "domainname"
+# [tutorial v1.1_024)] A variable with type's parameters
 
-[View the diff](https://forge.cloud.silique.fr/stove/rougail-tutorials/compare/v1.1_023~1..v1.1_023)
+[View the diff](https://forge.cloud.silique.fr/stove/rougail-tutorials/compare/v1.1_024~1..v1.1_024)
 
 
 ## Screenshot
@@ -50,13 +50,15 @@ manual:  # Manual proxy configuration
     address:
       description: HTTP address
       type: domainname
+      params:
+        allow_ip: true
 ...
 
 ```
 ### Let's generate the documentation
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -o doc
 ```
 | Variable&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   | Description&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   |
@@ -77,19 +79,19 @@ foo@bar:~$ rougail -m firefox/ -o doc
 
 | Variable&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   | Description&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   |
 |------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| **manual.http_proxy.address**<br/>[`domainname`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`                                                                                                                                                                                                                                                                                                                                                                                                                                         | HTTP address.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
+| **manual.http_proxy.address**<br/>[`domainname`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`                                                                                                                                                                                                                                                                                                                                                                                                                                         | HTTP address.<br/>**Validator**: the domain name can be an IP                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
 
 ### Let's generate the changelog
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -o doc --doc.contents changelog
 ```
 #### Modified variable
 
-| Variable&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   | Description&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   |
-|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| **manual.http_proxy.address**<br/>~~`string`~~ [<ins>`domainname`</ins>](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | HTTP address.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
+| Variable&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   | Description&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   |
+|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| **manual.http_proxy.address**<br/>[`domainname`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`                                                                                                                                                                                                                                                                                                                                                                                                                                         | HTTP address.<br/>**Validator**: <ins>the domain name can be an IP</ins>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
 
 
 ## User datas
@@ -106,7 +108,7 @@ foo@bar:~$ rougail -m firefox/ -o doc --doc.contents changelog
 #### Output
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/01/config.yaml
 ```
 <pre><span style="font-weight: bold; color: #ff0000">🛑 ERRORS</span>
@@ -118,7 +120,7 @@ foo@bar:~$ rougail -m firefox/ -u yaml -ff config/01/config.yaml
 #### Output in read write mode
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/01/config.yaml --cli.read_write
 ```
 <pre><span style="font-weight: bold; color: #ff0000">🛑 ERRORS</span>
@@ -140,7 +142,7 @@ proxy_mode: Manual proxy configuration
 #### Output
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/02/config.yaml
 ```
 <pre><span style="font-weight: bold; color: #ff0000">🛑 ERRORS</span>
@@ -152,7 +154,7 @@ foo@bar:~$ rougail -m firefox/ -u yaml -ff config/02/config.yaml
 #### Output in read write mode
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/02/config.yaml --cli.read_write
 ```
 <pre><span style="font-weight: bold; color: #ff0000">🛑 ERRORS</span>
@@ -177,7 +179,7 @@ manual:
 #### Output
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/03/config.yaml
 ```
 <pre>╭────────────── Caption ───────────────╮
@@ -193,7 +195,7 @@ Variables:
 #### Output in read write mode
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/03/config.yaml --cli.read_write
 ```
 <pre>╭────────────── Caption ───────────────╮
@@ -223,7 +225,7 @@ manual:
 #### Output
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/04/config.yaml
 ```
 <pre><span style="font-weight: bold; color: #ffff00">🔔 WARNINGS</span>
@@ -241,7 +243,7 @@ Variables:
 #### Output in read write mode
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/04/config.yaml --cli.read_write
 ```
 <pre><span style="font-weight: bold; color: #ffff00">🔔 WARNINGS</span>
@@ -276,7 +278,7 @@ manual:
 #### Output
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/05/config.yaml
 ```
 <pre><span style="font-weight: bold; color: #ffff00">🔔 WARNINGS</span>
@@ -296,7 +298,7 @@ Variables:
 #### Output in read write mode
 
 ```console
-foo@bar:~$ git switch --detach v1.1_023
+foo@bar:~$ git switch --detach v1.1_024
 foo@bar:~$ rougail -m firefox/ -u yaml -ff config/05/config.yaml --cli.read_write
 ```
 <pre><span style="font-weight: bold; color: #ffff00">🔔 WARNINGS</span>
@@ -315,4 +317,4 @@ Variables:
 </pre>
 
 
-- [[tutorial v1.1_024] A variable with type's parameters](https://forge.cloud.silique.fr/stove/rougail-tutorials/src/commit/v1.1_024/README.md) ([diff](https://forge.cloud.silique.fr/stove/rougail-tutorials/compare/v1.1_024~1..v1.1_024))
+- [[tutorial v1.1_025] A variable with type "port"](https://forge.cloud.silique.fr/stove/rougail-tutorials/src/commit/v1.1_025/README.md) ([diff](https://forge.cloud.silique.fr/stove/rougail-tutorials/compare/v1.1_025~1..v1.1_025))