diff --git a/core/authentication/resources/classes/authentication.php b/core/authentication/resources/classes/authentication.php
index ab0355aec5..9378a14844 100644
--- a/core/authentication/resources/classes/authentication.php
+++ b/core/authentication/resources/classes/authentication.php
@@ -229,6 +229,9 @@ class authentication {
 					$_SESSION["user_uuid"] = $result["user_uuid"];
 					$_SESSION["context"] = $result['domain_name'];
 
+				//used to validate the session
+					$_SESSION["user_hash"] = hash('sha256', $_SERVER['REMOTE_ADDR'].$_SERVER['HTTP_USER_AGENT']);
+
 				//user session array
 					$_SESSION["user"]["domain_uuid"] = $result["domain_uuid"];
 					$_SESSION["user"]["domain_name"] = $result["domain_name"];
@@ -236,7 +239,7 @@ class authentication {
 					$_SESSION["user"]["username"] = $result["username"];
 					$_SESSION["user"]["contact_uuid"] = $result["contact_uuid"];
 
-				//get the groups assigned to the user 
+				//get the groups assigned to the user
 					$group = new groups;
 					$group->session($result["domain_uuid"], $result["user_uuid"]);
 
diff --git a/resources/check_auth.php b/resources/check_auth.php
index 66cf392292..5232247c27 100644
--- a/resources/check_auth.php
+++ b/resources/check_auth.php
@@ -37,7 +37,7 @@
 	}
 
 //start the session
-	if (function_exists('session_start')) { 
+	if (function_exists('session_start')) {
 		if (!isset($_SESSION)) {
 			session_start();
 		}
@@ -70,8 +70,19 @@
 //define variables
 	if (!isset($_SESSION['template_content'])) { $_SESSION["template_content"] = null; }
 
+//if session authorized is not set then set the default value to false
+	if (!isset($_SESSION['authorized'])) {
+		$_SESSION['authorized'] = false;
+	}
+
+//validate the session address
+	if ($_SESSION['authorized'] && $_SESSION["user_hash"] !== hash('sha256', $_SERVER['REMOTE_ADDR'].$_SERVER['HTTP_USER_AGENT'])) {
+		session_destroy();
+		header("Location: ".PROJECT_PATH."/?path=".urlencode($target_path));
+	}
+
 //if the session is not authorized then verify the identity
-	if (!isset($_SESSION['authorized']) || (isset($_SESSION['authorized']) && !$_SESSION['authorized'])) {
+	if (!$_SESSION['authorized']) {
 
 		//clear the menu
 			unset($_SESSION["menu"]);