WordPress - Default security settings: X-Frame-Options Header in Wordpress. Cookie with HTTPOnly and Secure flag in Wordpress. Secure connection. Cleanup image edits. Disable plugin and theme update and installation. Disable the plugin and theme editor. Disallow unfiltered content. Disallow unfiltered uploads. Disable load scripts for prevent DD…

wp-config.php

<?php
/**
 * File: wp-config.php
 * 
 * 1. X-Frame-Options Header in Wordpress
 * 2. Cookie with HTTPOnly and Secure flag in Wordpress
 * 3. Secure connection
 * 4. Cleanup image edits
 * 5. Disable plugin and theme update and installation
 * 6. Disable the plugin and theme editor
 * 7. Disallow unfiltered content
 * 8. Disallow unfiltered uploads
 * 9. Disable load scripts for prevent DDOS attacks
 * 10. Enable auto security update
 * 11. Redirect nonexistent blogs
 * 12. Enable auto security update
 * 13. Block external url requests
 * 
 */

/** wp-config.php / X-Frame-Options Header in Wordpress */
header( 'X-Frame-Options: SAMEORIGIN' );

/** wp-config.php / Cookie with HTTPOnly and Secure flag in Wordpress */
@ini_set( 'session.cookie_httponly', true ); 
@ini_set( 'session.cookie_secure', true ); 
@ini_set( 'session.use_only_cookies', true );

/** wp-config.php / Secure connection */
define( 'FTP_SSL', true );

/** wp-config.php / Cleanup image edits */
define( 'IMAGE_EDIT_OVERWRITE', true );

/** wp-config.php / Disable plugin and theme update and installation */
define( 'DISALLOW_FILE_MODS', true );

/** wp-config.php / Disable the PLUGIN AND THEME EDITOR */
define( 'DISALLOW_FILE_EDIT', true );

/** wp-config.php / Disallow unfiltered content */
define( 'DISALLOW_UNFILTERED_HTML', true );

/** wp-config.php / Disallow unfiltered uploads */
define( 'ALLOW_UNFILTERED_UPLOADS', false );

/** wp-config.php / Disable load scripts for prevent DDOS attacks */
define( 'CONCATENATE_SCRIPTS', false );

/** wp-config.php / Enable auto security update */
define( 'WP_AUTO_UPDATE_CORE', 'minor' );

/** wp-config.php / Redirect nonexistent blogs */
define( 'NOBLOGREDIRECT', WP_HOME );

/** wp-config.php / Block external url requests */
define( 'WP_HTTP_BLOCK_EXTERNAL', true );
define( 'WP_ACCESSIBLE_HOSTS', 'api.wordpress.org,*.github.com' );