diff --git a/doc/Extensions/Authentication.md b/doc/Extensions/Authentication.md
index 48ad0e92fd..e32d67e021 100644
--- a/doc/Extensions/Authentication.md
+++ b/doc/Extensions/Authentication.md
@@ -13,6 +13,8 @@ Here we will provide configuration details for these modules.
 
 - HTTP Auth: http-auth
 
+- Radius: radius
+
 #### User levels
 
 - 1: Normal User. You will need to assign device / port permissions for users at this level.
@@ -125,3 +127,18 @@ $config['auth_ad_groups']['admin']['level'] = 10;
 $config['auth_ad_groups']['pfy']['level'] = 7;
 $config['auth_ad_require_groupmembership'] = 0;
 ```
+
+#### Radius Authentication
+
+Please note that a mysql user is created for each user the logs in successfully. User level 1 is assigned to those accounts so you will then need to assign the relevant permissions unless you set `$config['radius']['userlevel']` to be something other than 1.
+
+> Cleanup of old accounts is done using the authlog. You will need to set the cleanup date for when old accounts will be purged which will happen AUTOMATICALLY.
+> Please ensure that you set the $config['authlog_purge'] value to be greater than $config['radius']['users_purge'] otherwise old users won't be removed.
+
+```php
+$config['radius']['hostname']   = 'localhost';
+$config['radius']['port']       = '1812';
+$config['radius']['secret']     = 'testing123';
+$config['radius']['timeout']    = 3;
+$config['radius']['users_purge'] = 14;//Purge users who haven't logged in for 14 days.
+```
diff --git a/html/includes/authentication/radius.inc.php b/html/includes/authentication/radius.inc.php
index a6ab0600cf..663d2b7298 100644
--- a/html/includes/authentication/radius.inc.php
+++ b/html/includes/authentication/radius.inc.php
@@ -49,7 +49,7 @@ function auth_usermanagement() {
 }
 
 
-function adduser($username, $password, $level=0, $email='', $realname='', $can_modify_passwd=0, $description='', $twofactor=0) {
+function adduser($username, $password, $level=1, $email='', $realname='', $can_modify_passwd=0, $description='', $twofactor=0) {
     // Check to see if user is already added in the database
     if (!user_exists($username)) {
         $userid = dbInsert(array('username' => $username, 'realname' => '', 'email' => '', 'descr' => '', 'level' => $level, 'can_modify_passwd' => 0, 'twofactor' => 0), 'users');