diff --git a/conf/message b/conf/message
index d8a5625..09b8a8a 100644
--- a/conf/message
+++ b/conf/message
@@ -1,4 +1,5 @@
 Standard Notes - Syncing Server was successfully __TYPE__.
 Please configure the Standard Notes web app or mobile app to use this syninc server: https://__DOMAIN____PATH_URL__/
 __ACTION__
+__CONFIG_PANEL__
 __EXTENSIONS__
diff --git a/config_panel.toml b/config_panel.toml
new file mode 100644
index 0000000..0fb6cdb
--- /dev/null
+++ b/config_panel.toml
@@ -0,0 +1,14 @@
+version = "1.0"
+name = "SNServer configuration panel"
+
+[main]
+name = "SNserver configuration"
+
+    [main.access_domain]
+    name = "Access Domain"
+
+        [main.access_domain.access_domain]
+        ask = "Which web app can access the Standart Notes Extensions?"
+        type = "string"
+        default = ""
+        help = "Please enter the domain without the path of a Standart Notes Web App, which should have access to the Standard Notes Extensions.<br>Example: domain.tld, notes.domain.tld"
diff --git a/scripts/change_url b/scripts/change_url
index 1b88348..82d2976 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -180,6 +180,7 @@ admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)
 message_extensions="To install extensions open this page: https://$domain$path_url/extensions/\n\
 You changed the url of the syncing server. All extensions installed from here must be reinstalled by the users."
 action="You can find some specific actions for this app by using the experimental __URL_TAG1__action feature__URL_TAG2__$admin_panel/actions__URL_TAG3__"
+config_panel="You can find some specific configurations for this app by using the experimental __URL_TAG1__config-panel feature__URL_TAG2__$admin_panel/config-panel__URL_TAG3__"
 
 ynh_replace_string --match_string="__TYPE__" --replace_string="changed the url" --target_file="../conf/message"
 ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="../conf/message"
@@ -192,6 +193,7 @@ else
     ynh_replace_string --match_string="__EXTENSIONS__" --replace_string="" --target_file="../conf/message"
 fi
 ynh_replace_string --match_string="__ACTION__" --replace_string="$action" --target_file="../conf/message"
+ynh_replace_string --match_string="__CONFIG_PANEL__" --replace_string="$config_panel" --target_file="../conf/message"
 
 ynh_send_readme_to_admin --app_message="../conf/message" --type='upgrade'
 
diff --git a/scripts/config b/scripts/config
new file mode 100755
index 0000000..c696738
--- /dev/null
+++ b/scripts/config
@@ -0,0 +1,67 @@
+#!/bin/bash
+
+#=================================================
+# GENERIC START
+#=================================================
+# IMPORT GENERIC HELPERS
+#=================================================
+
+source ./_common.sh
+source /usr/share/yunohost/helpers
+
+# Stop script if errors
+ynh_abort_if_errors
+
+#=================================================
+# RETRIEVE ARGUMENTS
+#=================================================
+
+app=$YNH_APP_INSTANCE_NAME
+access_domain=$(ynh_app_setting_get --app=$app --key=access_domain)
+domain=$(ynh_app_setting_get --app=$app --key=domain)
+
+#=================================================
+# SHOW_CONFIG FUNCTION FOR 'SHOW' COMMAND
+#=================================================
+
+show_config() {
+        if [ ! -z $access_domain ]
+        then
+                ynh_return "YNH_CONFIG_MAIN_ACCESS_DOMAIN_ACCESS_DOMAIN=$access_domain"
+        else
+                ynh_return "YNH_CONFIG_MAIN_ACCESS_DOMAIN_ACCESS_DOMAIN=$domain"
+        fi
+}
+
+#=================================================
+# MODIFY THE CONFIGURATION
+#=================================================
+
+apply_config() {
+    access_domain=${YNH_CONFIG_MAIN_ACCESS_DOMAIN_ACCESS_DOMAIN:-$access_domain}
+    ynh_print_info "1: $access_domain"
+    ynh_app_setting_set --app=$app --key=access_domain --value=$access_domain
+
+    access_domain=$(ynh_app_setting_get --app=$app --key=access_domain)
+    ynh_print_info "2: $access_domain"
+
+    nginx_conf_path=/etc/nginx/conf.d/$domain.d/$app.conf
+    ynh_delete_file_checksum --file=$nginx_conf_path
+    ynh_replace_string \
+        --match_string='more_set_headers "X-Frame-Options: allow-from .*";' \
+        --replace_string='more_set_headers "X-Frame-Options: allow-from '$access_domain'";' \
+        --target_file=$nginx_conf_path
+    ynh_store_file_checksum --file=$nginx_conf_path
+
+    systemctl reload nginx
+}
+
+#=================================================
+# GENERIC FINALIZATION
+#=================================================
+# SELECT THE ACTION FOLLOWING THE GIVEN ARGUMENT
+#=================================================
+case $1 in
+    show) show_config;;
+    apply) apply_config;;
+esac
diff --git a/scripts/install b/scripts/install
index e4baa18..a73f02e 100755
--- a/scripts/install
+++ b/scripts/install
@@ -34,6 +34,10 @@ then
     access_domain=$domain
 else
     access_domain=$YNH_APP_ARG_ACCESS_DOMAIN
+    if [ -z $access_domain ]
+    then
+        access_domain=$domain
+    fi
 fi
 
 #=================================================
@@ -294,6 +298,7 @@ You can configure this app by using the config-panel"
 
 admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)/yunohost/admin/#/apps/$app"
 action="You can find some specific actions for this app by using the experimental __URL_TAG1__action feature__URL_TAG2__$admin_panel/actions__URL_TAG3__"
+config_panel="You can find some specific configurations for this app by using the experimental __URL_TAG1__config-panel feature__URL_TAG2__$admin_panel/config-panel__URL_TAG3__"
 
 ynh_replace_string --match_string="__TYPE__" --replace_string="installed" --target_file="../conf/message"
 ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="../conf/message"
@@ -306,6 +311,7 @@ else
     ynh_replace_string --match_string="__EXTENSIONS__" --replace_string="$message_no_extensions" --target_file="../conf/message"
 fi
 ynh_replace_string --match_string="__ACTION__" --replace_string="$action" --target_file="../conf/message"
+ynh_replace_string --match_string="__CONFIG_PANEL__" --replace_string="$config_panel" --target_file="../conf/message"
 
 ynh_send_readme_to_admin --app_message="../conf/message" --type='install'
 
diff --git a/scripts/upgrade b/scripts/upgrade
index bbe0b40..c051379 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -341,6 +341,7 @@ You can configure this app by using the config-panel"
 
 admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)/yunohost/admin/#/apps/$app"
 action="You can find some specific actions for this app by using the experimental __URL_TAG1__action feature__URL_TAG2__$admin_panel/actions__URL_TAG3__"
+config_panel="You can find some specific configurations for this app by using the experimental __URL_TAG1__config-panel feature__URL_TAG2__$admin_panel/config-panel__URL_TAG3__"
 
 ynh_replace_string --match_string="__TYPE__" --replace_string="installed" --target_file="../conf/message"
 ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="../conf/message"
@@ -353,6 +354,7 @@ else
     ynh_replace_string --match_string="__EXTENSIONS__" --replace_string="$message_no_extensions" --target_file="../conf/message"
 fi
 ynh_replace_string --match_string="__ACTION__" --replace_string="$action" --target_file="../conf/message"
+ynh_replace_string --match_string="__CONFIG_PANEL__" --replace_string="$config_panel" --target_file="../conf/message"
 
 ynh_send_readme_to_admin --app_message="../conf/message" --type='upgrade'