diff --git a/conf/ice-servers.json b/conf/ice-servers.json
index 877f3c1..a63da38 100644
--- a/conf/ice-servers.json
+++ b/conf/ice-servers.json
@@ -1,8 +1,8 @@
 [
     {
         "urls": [
-            "turn:example.com:5349",
-            "turn:example.com:5349?transport=tcp"
+            "turn:turn.example.org:5349",
+            "turn:turn.example.org:5349?transport=tcp"
         ],
         "username": "galene",
         "credential": "secret",
diff --git a/conf/systemd.service b/conf/systemd.service
index 053d09f..148beb1 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -8,7 +8,7 @@ Type=simple
 WorkingDirectory=__FINALPATH__/
 User=__APP__
 Group=__APP__
-ExecStart=__FINALPATH__/galene -turn __PUBLIC_IP4__:__TURN_PORT__
+ExecStart=__FINALPATH__/galene -http __PORT__ -turn __PUBLIC_IP4__:__TURN_PORT__ -udp-range 49152:65535
 LimitNOFILE=65536
 
 [Install]
diff --git a/doc/DISCLAIMER.md b/doc/DISCLAIMER.md
index 0f1d407..fe68e5a 100644
--- a/doc/DISCLAIMER.md
+++ b/doc/DISCLAIMER.md
@@ -1,3 +1,27 @@
-### How to creat groups
+### Configure your groups
 
 Groups are defined by files in the `/opt/yunohost/galene/groups` directory. Various options are available (see https://github.com/YunoHost-Apps/galene_ynh/wiki/Configuration-file)
+
+## Configure your TURN server
+
+#### Using Galène Turn server
+Galène comes with build in TURN server that should work out-of-the-box.
+- If your server is behind NAT, allow incoming traffic to TCP port `8443` (or whatever is configured with the `-http` option in `/etc/systemd/system/galene.service`) and port `1194` (or whatever is configured with the `-turn` option in `/etc/systemd/system/galene.service`)
+
+#### Using you own TURN server
+- Install [coturn_ynh](https://github.com/YunoHost-Apps/coturn_ynh).
+- Add `data/ice-servers.json` with this lines and change `turn.example.org` and `secret`
+
+```
+    [
+        {
+            "urls": [
+                "turn:turn.example.org:443",
+                "turn:turn.example.org:443?transport=tcp"
+            ],
+            "username": "galene",
+            "credential": "secret"
+        }
+    ]
+```
+- set `/etc/systemd/system/galene.service` turn option to `-turn auto` 
diff --git a/doc/DISCLAIMER_fr.md b/doc/DISCLAIMER_fr.md
index e3fcbcd..16b6393 100644
--- a/doc/DISCLAIMER_fr.md
+++ b/doc/DISCLAIMER_fr.md
@@ -1,3 +1,29 @@
 ### Comment créer des groupes
 
 Les groupes sont définis par des fichiers dans le répertoire `/opt/yunohost/galene/groups`. Différentes options sont disponibles (voir https://github.com/YunoHost-Apps/galene_ynh/wiki/Configuration-file)
+
+### Configurez vos groupes
+
+## Configurez votre serveur TURN
+
+#### Utilisation du serveur Galène Turn
+Galène est livré avec un serveur TURN intégré qui devrait fonctionner immédiatement.
+- Si votre serveur est derrière NAT, autorisez le trafic entrant vers le port TCP `8443` (ou tout ce qui est configuré avec l'option` -http` dans `/etc/systemd/system/galene.service`) et le port` 1194` (ou tout ce qui est configuré avec l'option `-turn` dans` /etc/systemd/system/galene.service`)
+
+#### Utilisation de votre propre serveur TURN
+- Installez [coturn_ynh] (https://github.com/YunoHost-Apps/coturn_ynh).
+- Ajoutez `data/ice-servers.json` avec ces lignes et changez `turn.example.org` et `secret`
+
+``
+    [
+        {
+            "urls": [
+                "turn: turn.example.org: 443",
+                "turn: turn.example.org: 443? transport = tcp"
+            ],
+            "username": "galene",
+            "credential": "secret"
+        }
+    ]
+``` 
+- définir l'option de virage `/etc/systemd/system/galene.service` sur` -turn auto` 
\ No newline at end of file
diff --git a/scripts/install b/scripts/install
index ede54c5..de020e1 100755
--- a/scripts/install
+++ b/scripts/install
@@ -76,6 +76,9 @@ ynh_script_progression --message="Configuring firewall..." --weight=1
 
 ynh_exec_warn_less yunohost firewall allow Both $turn_port
 
+# Reserve UDP Port range 49152:65535
+ynh_exec_warn_less yunohost firewall allow UDP -4 49152:65535
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index df202ee..27f03fd 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -68,6 +68,11 @@ then
 	ynh_exec_warn_less yunohost firewall disallow both $turn_port
 fi
 
+if yunohost firewall list | grep -q "\- 49152:65535"
+then
+	ynh_exec_warn_less yunohost firewall disallow UDP 49152:65535
+fi
+
 #=================================================
 # GENERIC FINALIZATION
 #=================================================