diff --git a/Ansible/asserts/display.yml b/Ansible/asserts/display.yml
new file mode 100644
index 0000000..aa77cff
--- /dev/null
+++ b/Ansible/asserts/display.yml
@@ -0,0 +1,6 @@
+- name: Display variable env_proxy_all.host
+  ansible.builtin.debug:
+    var: env_proxy_all.host
+- name: Display variable env_proxy_all.port
+  ansible.builtin.debug:
+    var: env_proxy_all.port
diff --git a/Ansible/asserts/proxy.yml b/Ansible/asserts/proxy.yml
index 9622a3a..dfcc491 100644
--- a/Ansible/asserts/proxy.yml
+++ b/Ansible/asserts/proxy.yml
@@ -9,6 +9,5 @@
 - name: Test variable env_proxy.port
   ansible.builtin.assert:
     that:
-      - env_proxy.port is defined
-      - env_proxy.port is string or env_proxy.port is integer
+      - env_proxy.port is not defined or env_proxy.port is string or env_proxy.port is integer
     fail_msg: "La variable n'existe pas ou est de mauvais type !"
diff --git a/Ansible/inventory/group_vars/all/proxy.yml b/Ansible/inventory/group_vars/all/proxy.yml
new file mode 100644
index 0000000..c86d03d
--- /dev/null
+++ b/Ansible/inventory/group_vars/all/proxy.yml
@@ -0,0 +1,4 @@
+---
+env_proxy_all:
+  host: "{{ env_proxy.host }}"
+  port: "{{ env_proxy.port | default(3128) }}"
diff --git a/doc.md b/doc.md
index 53f6c09..166391b 100644
--- a/doc.md
+++ b/doc.md
@@ -16,14 +16,13 @@ to make network connections to network services outside its own network.
 | Parameter                                                                                                                                                                                                                                                  | Comment                                                                                                                                                                                                                                                    |
 |------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | **host**<br/>`mandatory`<br/>**Type:** [`domainname`](https://forge.cloud.silique.fr/stove/rougail/src/branch/main/doc/variable/README.md#le-type-de-la-variable)                                                                                          | The proxy server’s address.<br/>Specifies the hostname of proxy server to enable proxy server access to all of your HTTP(s) requests. .<br/>**Example:** proxy.silique.fr                                                                                  |
-| **port**<br/>`mandatory`<br/>**Type:** [`port`](https://forge.cloud.silique.fr/stove/rougail/src/branch/main/doc/variable/README.md#le-type-de-la-variable)                                                                                                | The proxy server's port.<br/>**Example:** 3128                                                                                                                                                                                                             |
+| **port**<br/>`mandatory`<br/>**Type:** [`port`](https://forge.cloud.silique.fr/stove/rougail/src/branch/main/doc/variable/README.md#le-type-de-la-variable)                                                                                                | The proxy server's port.<br/>**Default:** 3128                                                                                                                                                                                                             |
 
 # Example with mandatories variables
 
 ```
 env_proxy:
   host: proxy.silique.fr
-  port: '3128'
 ```
 
 # Example with all variables