diff --git a/block.html-example b/block.html-example
new file mode 100644
index 000000000..886160f1d
--- /dev/null
+++ b/block.html-example
@@ -0,0 +1,5 @@
+<h1> Nous sommes en maintenance </h1>
+<p>
+	Le site est actuellement en maintenance.
+</p>
+
diff --git a/html/admin-noalyss.php b/html/admin-noalyss.php
index c6d273783..bafab207b 100644
--- a/html/admin-noalyss.php
+++ b/html/admin-noalyss.php
@@ -31,6 +31,7 @@ if (file_exists("../include/config.inc.php") ) {
     define ('ALLOWED',1);
     define ('ALLOWED_ADMIN',1);
     require_once '../include/constant.php';
+    require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
 
     \Noalyss\Dbg::echo_file(__FILE__);
     if ( DEBUGNOALYSS > 1 ) {
@@ -41,6 +42,8 @@ if (file_exists("../include/config.inc.php") ) {
         \Noalyss\Dbg::display_request();
         \Noalyss\Dbg::display_global();
     } //<--- if DEBUG
+
+    MaintenanceMode("block.html");
     require_once NOALYSS_INCLUDE.'/admin_repo.inc.php';
 } else {
     // Redirect to install file , if this file exists then 
diff --git a/html/ajax.php b/html/ajax.php
index ecac8dc10..2d32d7521 100644
--- a/html/ajax.php
+++ b/html/ajax.php
@@ -14,12 +14,13 @@
  */
 if ( ! defined ('ALLOWED') ) define ('ALLOWED',1);
 require_once '../include/constant.php';
+require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
 require_once NOALYSS_INCLUDE.'/class/database.class.php';
 require_once NOALYSS_INCLUDE.'/lib/icon_action.class.php';
 require_once NOALYSS_INCLUDE . '/class/noalyss_user.class.php';
 require_once NOALYSS_INCLUDE.'/class/extension.class.php';
 if ( !isset ($_REQUEST['gDossier'])) exit();
-
+MaintenanceMode("block.html");
 require_once NOALYSS_INCLUDE.'/class/noalyss_parameter_folder.class.php';
 mb_internal_encoding("UTF-8");
 /**
@@ -29,6 +30,7 @@ if ( ! isset($_SESSION[SESSION_KEY."g_user"])) {
     echo "NOCONX";
     die();
 }
+
 global $g_user,$cn,$g_parameter;
 $cn=Dossier::connect();
 $g_parameter=new Noalyss_Parameter_Folder($cn);
diff --git a/html/compute.php b/html/compute.php
index 8f4ad674e..7d70e99dd 100644
--- a/html/compute.php
+++ b/html/compute.php
@@ -37,6 +37,9 @@ require_once  NOALYSS_INCLUDE.'/class/dossier.class.php';
 require_once  NOALYSS_INCLUDE.'/class/acc_tva.class.php';
 require_once NOALYSS_INCLUDE . '/class/noalyss_user.class.php';
 
+require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+MaintenanceMode("block.html");
+
 // Check if the needed field does exist
 extract ($_GET, EXTR_SKIP );
 foreach (array('t','c','p','q','n','gDossier') as $a)
diff --git a/html/direct.php b/html/direct.php
index 3148e2226..1f10466a4 100644
--- a/html/direct.php
+++ b/html/direct.php
@@ -24,6 +24,8 @@
 require_once '../include/constant.php';
 require_once NOALYSS_INCLUDE.'/class/database.class.php';
 require_once NOALYSS_INCLUDE . '/class/noalyss_user.class.php';
+require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+MaintenanceMode("block.html");
 
 $cn=Dossier::connect();
 global $g_user;
diff --git a/html/do.php b/html/do.php
index d24e5bf0d..68e9b21c2 100644
--- a/html/do.php
+++ b/html/do.php
@@ -23,13 +23,15 @@ define('ALLOWED',1);
  * \brief Main file
  */
 require_once '../include/constant.php';
+require_once NOALYSS_INCLUDE.'/constant.security.php';
+require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+
+MaintenanceMode("block.html");
 
 require_once NOALYSS_INCLUDE.'/class/database.class.php';
 require_once NOALYSS_INCLUDE.'/class/dossier.class.php';
 require_once NOALYSS_INCLUDE.'/lib/user_common.php';
-require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
 require_once NOALYSS_INCLUDE.'/lib/function_javascript.php';
-require_once NOALYSS_INCLUDE.'/constant.security.php';
 require_once NOALYSS_INCLUDE.'/lib/html_input.class.php';
 require_once NOALYSS_INCLUDE.'/lib/http_input.class.php';
 require_once NOALYSS_INCLUDE.'/lib/icon_action.class.php';
diff --git a/html/export.php b/html/export.php
index e56a3423e..dda4479b4 100644
--- a/html/export.php
+++ b/html/export.php
@@ -26,6 +26,9 @@
  */
 define ('ALLOWED',1);
 require_once '../include/constant.php';
+require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+MaintenanceMode("block.html");
+
 global $g_user,$cn,$g_parameter;
 require_once NOALYSS_INCLUDE.'/class/database.class.php';
 require_once NOALYSS_INCLUDE . '/class/noalyss_user.class.php';
diff --git a/html/extension.raw.php b/html/extension.raw.php
index b484ff547..2b639dc90 100644
--- a/html/extension.raw.php
+++ b/html/extension.raw.php
@@ -33,6 +33,8 @@ require_once  NOALYSS_INCLUDE.'/lib/html_input.class.php';
 require_once NOALYSS_INCLUDE.'/lib/iselect.class.php';
 require_once NOALYSS_INCLUDE . '/class/noalyss_user.class.php';
 
+MaintenanceMode("block.html");
+
 global $g_user,$cn,$g_parameter;
 $http=new HttpInput();
 $cn=Dossier::connect();
diff --git a/html/fid.php b/html/fid.php
index 1f18cfa29..854b6a512 100644
--- a/html/fid.php
+++ b/html/fid.php
@@ -33,7 +33,8 @@
    *\note if the j is -1 then all the card are shown
  */
 require_once '../include/constant.php';
-
+require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+MaintenanceMode("block.html");
 /**
  * if not connected, session is expired then exit with a message NOCONX
  */
diff --git a/html/fid_card.php b/html/fid_card.php
index 27bfc71a3..fa8a98694 100644
--- a/html/fid_card.php
+++ b/html/fid_card.php
@@ -40,6 +40,9 @@ require_once '../include/constant.php';
 require_once NOALYSS_INCLUDE.'/class/database.class.php';
 require_once NOALYSS_INCLUDE.'/lib/http_input.class.php';
 require_once NOALYSS_INCLUDE.'/class/dossier.class.php';
+require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+MaintenanceMode("block.html");
+
 /**
  * if not connected, session is expired then exit with a message NOCONX
  */
diff --git a/html/index.php b/html/index.php
index 501e843c6..81d11a029 100644
--- a/html/index.php
+++ b/html/index.php
@@ -158,6 +158,8 @@ $my_domain="";
 require_once '../include/constant.php';
 require_once '../include/config.inc.php';
 require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+MaintenanceMode("block.html");
+
 if ( file_exists("install.php")&& DEBUGNOALYSS == 0 )
 {
     // At the end of the installation procedure , the install file must be removed
diff --git a/html/login.php b/html/login.php
index 7fb03441a..d3588d023 100644
--- a/html/login.php
+++ b/html/login.php
@@ -19,7 +19,8 @@
 // Copyright Author Dany De Bontridder danydb@aevalys.eu
 require_once '../include/constant.php';
 
-include_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+MaintenanceMode("block.html");
 
 /*! \file
  * \brief Login page
diff --git a/html/mobile.php b/html/mobile.php
index 5c19d8ef3..a62d688a6 100644
--- a/html/mobile.php
+++ b/html/mobile.php
@@ -23,8 +23,11 @@
  * @file
  * @brief only for mobile device
  */
- 
+
 require_once '../include/constant.php';
+require_once NOALYSS_INCLUDE.'/lib/ac_common.php';
+MaintenanceMode("block.html");
+
 global $g_user;
 
 $cn=new Database();
diff --git a/html/recherche.php b/html/recherche.php
index c914bdf0d..5d04bf7ec 100644
--- a/html/recherche.php
+++ b/html/recherche.php
@@ -28,6 +28,8 @@ require_once NOALYSS_INCLUDE.'/class/acc_ledger.class.php';
 require_once NOALYSS_INCLUDE.'/class/acc_ledger_search.class.php';
 require_once NOALYSS_INCLUDE.'/lib/icon_action.class.php';
 require_once NOALYSS_INCLUDE.'/lib/http_input.class.php';
+MaintenanceMode("block.html");
+
 if ( ! isset ($_SESSION[SESSION_KEY.'g_theme']))
 {
     echo "<h2>"._('Vous  êtes déconnecté')."</h2>";
diff --git a/html/user_login.php b/html/user_login.php
index 3582a17c9..e4477ff43 100644
--- a/html/user_login.php
+++ b/html/user_login.php
@@ -30,6 +30,8 @@ require_once NOALYSS_INCLUDE.'/lib/function_javascript.php';
 require_once NOALYSS_INCLUDE.'/lib/icon_action.class.php';
 
 @html_page_start($_SESSION[SESSION_KEY.'g_theme']);
+MaintenanceMode("block.html");
+
 $rep=new Database();
 require_once NOALYSS_INCLUDE . '/class/noalyss_user.class.php';
 $User=new Noalyss_user($rep);
diff --git a/include/lib/ac_common.php b/include/lib/ac_common.php
index a2659f714..98ec334db 100644
--- a/include/lib/ac_common.php
+++ b/include/lib/ac_common.php
@@ -1686,3 +1686,15 @@ function linkTo($p_url)
         return $p_url;
     }
 }
+/**
+ * @brief When you want to prevent users to connect, create a file in  noalyss/ (NOALYSS_BASE) with the
+ * message in Html
+ * @param string $p_file file in NOALYSS_BASE
+ */
+function MaintenanceMode($p_file)
+{
+    if ( file_exists(NOALYSS_BASE."/".$p_file )) {
+        include NOALYSS_BASE."/".$p_file;
+        exit;
+    }
+}
diff --git a/unit-test/global.php b/unit-test/global.php
index 2eeeb83aa..13d094206 100644
--- a/unit-test/global.php
+++ b/unit-test/global.php
@@ -24,7 +24,7 @@
  * Global variables
  */
 global $g_connection,$g_parameter,$g_user;
-if (!defined("DOSSIER"))define ("DOSSIER",25);
+if (!defined("DOSSIER"))define ("DOSSIER",101);
 
 $_REQUEST['gDossier'] = DOSSIER;
 $g_connection=new Database(DOSSIER);