What you need to know about WordPress security reinforcement!

WordPress is currently one of the most popular website building platforms in the world and is widely used in various website types such as personal blogs, corporate websites, and e-commerce platforms. However, due to its wide application and open source characteristics, WordPress websites have also become the target of hackers. Therefore, in order to ensure the security of the website, WordPress must be hardened. This article will introduce some must-know methods of WordPress security hardening and provide specific code examples.

1. Update WordPress

First, make sure your WordPress installation is the latest version. The WordPress team regularly releases security patches and updated versions to fix known vulnerabilities and improve system security. You can check whether there are any update prompts in the WordPress backend, and update them in time to ensure the security of the website.

2. Strengthen login password

Strong password is the basis for protecting WordPress website. It is recommended that the password contain at least 8 characters and include uppercase and lowercase letters, numbers and special symbols. Also avoid using passwords that are easy to guess, such as "123456", "password", etc. Password complexity can be forced through the following code example:

function custom_password_check( $errors ) {
    if ( empty( $_POST[ 'pass1' ] ) ) {
        return $errors;
    }
    
    $uppercase = preg_match('@[A-Z]@', $_POST[ 'pass1' ]);
    $lowercase = preg_match('@[a-z]@', $_POST[ 'pass1' ]);
    $number    = preg_match('@[0-9]@', $_POST[ 'pass1' ]);

    if ( !$uppercase || !$lowercase || !$number ) {
        $errors->add( 'password_too_weak', 'Password must contain uppercase, lowercase letters and numbers.' );
    }

    return $errors;
}

add_filter( 'registration_errors', 'custom_password_check' );

3. Limit the number of login attempts

To prevent brute force cracking of passwords, you can limit the number of login attempts. After multiple failed login attempts, the IP address is temporarily prohibited from accessing the login page. The following is a simple code example:

function limit_login_attempts() {
    $ip = $_SERVER['REMOTE_ADDR'];

    $login_attempts = get_transient( 'login_attempts_' . $ip );

    if ( false === $login_attempts ) {
        $login_attempts = 0;
    }

    $login_attempts++;

    set_transient( 'login_attempts_' . $ip, $login_attempts, MINUTE_IN_SECONDS );

    if ( $login_attempts > 3 ) {
        header( 'HTTP/1.1 403 Forbidden' );
        exit;
    }
}

add_action( 'wp_login_failed', 'limit_login_attempts' );

4. Disable directory browsing

By default, WordPress will list files in the directory, which provides hackers with the opportunity to collect information. Use the following code example to disable the directory browsing function:

Options -Indexes

Add the above code to the .htaccess file to disable the directory browsing function.

5. Disable file editing function

WordPress provides an editor function that allows theme and plug-in files to be edited directly in the background. This provides hackers with a very convenient way to invade. It is recommended to disable the file editing function to avoid potential security risks. The following is a code example:

define( 'DISALLOW_FILE_EDIT', true );

Add the above code to the wp-config.php file to disable the file editing function.

Summary

Through the above WordPress security hardening methods and code examples, you can effectively improve the security of your WordPress website and prevent various potential network attacks. These methods are only part of the security measures. Website security is an ongoing process, and it is recommended to conduct comprehensive security reviews and hardening of WordPress on a regular basis. I hope this article will help you strengthen the security of your WordPress website.

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