CKFinder Installation in the CKEditor for Drupal 7 Module

Please follow the steps below;
 Go to http://ckfinder.com/download and download CKfinder

Unpack the contents of the installation package into the directory that contains the CKEditor module and place it in thesites/all/modules/ckeditor/ckfinder (or sites/all/libraries/ckfinder) folder. . When the files are unpacked, you should see the following file structure inside the drupal/sites/all/modules directory:

Now open the CKFinder configuration file (ckfinder/config.php) and introduce the code changes described below.

Firstly, remove the CheckAuthentication() function (do not worry, this function is defined in filemanager.config.php, see below):

function CheckAuthentication()       <- remove it
{                                    <- remove it
   //WARNING : DO NOT simply...      <- remove it
   ...                               <- remove it
   return false;                     <- remove it
}

For CKFinder installed in the sites/all/modules/ckeditor/ckfinder directory add:

require_once '../../../../includes/filemanager.config.php';
straight below the following line:

$baseDir = resolveUrl($baseUrl);
For CKFinder installed in the sites/all/libraries/ckfinder directory add:

require_once '../../../../../modules/ckeditor/includes/filemanager.config.php';
straight below the following line:

$baseDir = resolveUrl($baseUrl);
Now open the Drupal settings file (sites/default/settings.php) and do the following:

Uncomment the $base_url variable and set the base URL of your website (without the trailing slash).
Uncomment the $cookie_domain variable and set the domain name of your website.

Select CKFinder as a preferred file browser in the Administration panel > Configuration > Content Authoring > CKEditor section (for a selected CKEditor profile scroll down to the File browser settings section).


Refernce URL's here 

In CKfinder documentation
In Drupal documentation