diff --git a/pandora_console/extras/mr/48.sql b/pandora_console/extras/mr/48.sql
index b5410f5bc1..b65846c487 100644
--- a/pandora_console/extras/mr/48.sql
+++ b/pandora_console/extras/mr/48.sql
@@ -1,5 +1,6 @@
 START TRANSACTION;
 
+ALTER TABLE `tmetaconsole_setup` ADD COLUMN `unified` TINYINT(1) UNSIGNED NOT NULL DEFAULT 0;
 ALTER TABLE `tlayout` ADD COLUMN `auto_adjust` INTEGER UNSIGNED NOT NULL default 0;
 ALTER TABLE `tlayout_data` ADD COLUMN `title` TEXT default '';
 
diff --git a/pandora_console/extras/pandoradb_migrate_6.0_to_7.0.mysql.sql b/pandora_console/extras/pandoradb_migrate_6.0_to_7.0.mysql.sql
index 92d2f3685c..f3c32bd806 100644
--- a/pandora_console/extras/pandoradb_migrate_6.0_to_7.0.mysql.sql
+++ b/pandora_console/extras/pandoradb_migrate_6.0_to_7.0.mysql.sql
@@ -418,6 +418,8 @@ ALTER TABLE `tmetaconsole_setup` MODIFY COLUMN `meta_dbuser` text NULL,
 
 ALTER TABLE `tmetaconsole_setup` ADD COLUMN `server_uid` TEXT NOT NULL default '';
 
+ALTER TABLE `tmetaconsole_setup` ADD COLUMN `unified` TINYINT(1) UNSIGNED NOT NULL DEFAULT 0;
+
 -- ---------------------------------------------------------------------
 -- Table `tprofile_view`
 -- ---------------------------------------------------------------------
diff --git a/pandora_console/general/node_deactivated.php b/pandora_console/general/node_deactivated.php
new file mode 100644
index 0000000000..c88f4f599e
--- /dev/null
+++ b/pandora_console/general/node_deactivated.php
@@ -0,0 +1,79 @@
+<?php
+/**
+ * Static page to lock access to console
+ *
+ * @category   Wizard
+ * @package    Pandora FMS
+ * @subpackage Applications.VMware
+ * @version    1.0.0
+ * @license    See below
+ *
+ *    ______                 ___                    _______ _______ ________
+ *   |   __ \.-----.--.--.--|  |.-----.----.-----. |    ___|   |   |     __|
+ *  |    __/|  _  |     |  _  ||  _  |   _|  _  | |    ___|       |__     |
+ * |___|   |___._|__|__|_____||_____|__| |___._| |___|   |__|_|__|_______|
+ *
+ * ============================================================================
+ * Copyright (c) 2005-2021 Artica Soluciones Tecnologicas
+ * Please see http://pandorafms.org for full contribution list
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation for version 2.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * ============================================================================
+ */
+
+// Begin.
+ui_require_css_file('maintenance');
+?>
+<html>
+<body>
+
+    <div class="responsive center padding-6">
+        <p><?php echo __('You cannot use this node until system is unified'); ?></p>
+        <br>
+        <br>
+
+        <?php
+        html_print_image(
+            'images/maintenance.png',
+            false,
+            [
+                'class' => 'responsive',
+                'width' => 800,
+            ]
+        );
+        ?>
+
+        <br>
+        <br>
+        <p>
+        <?php
+        echo __(
+            'Please navigate to %s to unify system',
+            '<a href="'.ui_get_meta_url(
+                'index.php?sec=advanced&sec2=advanced/command_center'
+            ).'" target="_new">'.__('command center').'</a>'
+        );
+        ?>
+    </p>
+        <br>
+        <p><?php echo __('You will be automatically redirected when all tasks finish'); ?></p>
+    </div>
+</body>
+
+<script type="text/javascript">
+    $(document).ready(function() {
+        setTimeout(
+            function() {
+                location.reload();
+            },
+            10000
+        );
+    })
+</script>
+
+</html>
\ No newline at end of file
diff --git a/pandora_console/include/functions.php b/pandora_console/include/functions.php
index 7c8fa7612c..45fbcf1077 100644
--- a/pandora_console/include/functions.php
+++ b/pandora_console/include/functions.php
@@ -1752,11 +1752,27 @@ function has_metaconsole()
  * @return boolean
  */
 function is_management_allowed($hkey='')
+{
+    return ( (is_metaconsole() && is_centrallised())
+        || (!is_metaconsole() && !is_centrallised())
+        || (!is_metaconsole() && is_centrallised()) && $hkey == generate_hash_to_api());
+}
+
+
+/**
+ * Return true if is a centrallised environment.
+ *
+ * @return boolean
+ */
+function is_centrallised()
 {
     global $config;
-    return ( (is_metaconsole() && $config['centralized_management'])
-        || (!is_metaconsole() && !$config['centralized_management'])
-        || (!is_metaconsole() && $config['centralized_management']) && $hkey == generate_hash_to_api());
+
+    if (isset($config['centralized_management']) === false) {
+        return false;
+    }
+
+    return (bool) $config['centralized_management'];
 }
 
 
@@ -1768,8 +1784,7 @@ function is_management_allowed($hkey='')
  */
 function is_central_policies()
 {
-    global $config;
-    return is_metaconsole() && $config['centralized_management'];
+    return is_metaconsole() && is_centrallised();
 }
 
 
diff --git a/pandora_console/include/styles/maintenance.css b/pandora_console/include/styles/maintenance.css
index c0c6623a20..821a30dced 100644
--- a/pandora_console/include/styles/maintenance.css
+++ b/pandora_console/include/styles/maintenance.css
@@ -22,8 +22,12 @@ h1 {
   color: #83b92f;
 }
 
+p a {
+  font-size: 1rem;
+}
+
 p {
-  font-size: 2rem;
+  font-size: 1rem;
   margin-bottom: 0.5rem;
   letter-spacing: 1.5px;
   font-weight: lighter;
diff --git a/pandora_console/index.php b/pandora_console/index.php
index e2af257836..6d986c8c3a 100755
--- a/pandora_console/index.php
+++ b/pandora_console/index.php
@@ -1040,6 +1040,30 @@ if (isset($_GET['bye'])) {
 
 clear_pandora_error_for_header();
 
+if ((bool) $config['node_deactivated'] === true) {
+    // Prevent access node if not merged.
+    include 'general/node_deactivated.php';
+
+    while (ob_get_length() > 0) {
+        ob_end_flush();
+    }
+
+    exit('</html>');
+}
+
+if ((bool) $config['maintenance_mode'] === true
+    && (bool) users_is_admin() === false
+) {
+    // Show maintenance web-page. For non-admin users only.
+    include 'general/maintenance.php';
+
+    while (ob_get_length() > 0) {
+        ob_end_flush();
+    }
+
+    exit('</html>');
+}
+
 /*
  * ----------------------------------------------------------------------
     *  EXTENSIONS
@@ -1087,21 +1111,6 @@ if (get_parameter('login', 0) !== 0) {
     }
 }
 
-
-if ((bool) $config['maintenance_mode'] === true
-    && (bool) users_is_admin() === false
-) {
-    // Show maintenance web-page. For non-admin users only.
-    include 'general/maintenance.php';
-
-    while (ob_get_length() > 0) {
-        ob_end_flush();
-    }
-
-    exit('</html>');
-}
-
-
 // Header.
 if ($config['pure'] == 0) {
     echo '<div id="container"><div id="head">';
diff --git a/pandora_console/pandoradb.sql b/pandora_console/pandoradb.sql
index 99a85f9358..daa3c98746 100644
--- a/pandora_console/pandoradb.sql
+++ b/pandora_console/pandoradb.sql
@@ -2747,8 +2747,9 @@ CREATE TABLE IF NOT EXISTS `tmetaconsole_setup` (
 	`auth_token` text,
 	`id_group` int(10) unsigned NOT NULL default 0,
 	`api_password` text NOT NULL,
-	`disabled` tinyint(1) unsigned NOT NULL default '0',
-	`last_event_replication` bigint(20) default '0',
+	`disabled` tinyint(1) unsigned NOT NULL default 0,
+	`unified` tinyint(1) unsigned NOT NULL default 0,
+	`last_event_replication` bigint(20) default 0,
 	`server_uid` text NOT NULL default '',
 	PRIMARY KEY  (`id`)
 ) ENGINE=InnoDB