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Table of Contents
Use plugins to restrict login attempts
Manually modify code to implement restrictions
Combined with server layer protection, more secure
Home CMS Tutorial WordPress How to limit login attempts in WordPress

How to limit login attempts in WordPress

Jul 15, 2025 am 12:28 AM
Login restrictions

To limit the number of WordPress login attempts, use the plug-in or manually add the code. 1. Use plug-ins such as Limit Login Attempts Reloaded or WP Limit Login Attempts to set the maximum number of failures (such as 5 times) and lock time (such as 30 minutes), and support IP whitelisting; 2. Manually add code to the theme functions.php file to achieve similar functions, but pay attention to backup and compatibility; 3. Further enhance security by combining server-layer protection such as .htaccess, CDN rate limiting or fail2ban. These methods are simple to operate and can effectively prevent brute-force attacks.

Limiting the number of WordPress login attempts is a simple but effective security measure that can prevent brute-force attacks. By default, WordPress does not limit the number of login failures, which gives attackers unlimited trial and error opportunities. We can limit the number of attempts to log in by plug-ins or manually adding code.

Use plugins to restrict login attempts

For most users, using plugins is the most convenient way. There are many mature WordPress plugins that can implement this feature, and there are often other security options available.

  • Recommended plug-ins : Limit Login Attempts Reloaded, WP Limit Login Attempts.
  • These plugins can set the maximum number of login failures, such as locking the account for a period of time after 5 failures (such as 30 minutes).
  • Support whitelisted IP addresses to avoid accidentally locking the administrator himself.
  • After installation, you only need to enable and enter the settings page to adjust the parameters, without coding capabilities.

The advantage of this type of plug-in is that it is frequently maintained and updated, has good compatibility, and is suitable for most websites.

Manually modify code to implement restrictions

If you don't want to use the plugin, you can also implement login attempt restrictions by adding code snippets to the theme's functions.php file.

Here is a simple example code:

 function limit_login_attempts() {
    $limit = 5;
    $lockout_time = 30 * 60; // Lock time (seconds)

    if (!session_id()) session_start();

    if (isset($_SESSION['login_attempts'])) {
        if ($_SESSION['login_attempts'] >= $limit) {
            $time_diff = time() - $_SESSION['login_attempt_time'];
            if ($time_diff < $lockout_time) {
                wp_die(&#39;Try too many times, please try again later.&#39;);
            } else {
                $_SESSION[&#39;login_attempts&#39;] = 0;
            }
        }
    } else {
        $_SESSION[&#39;login_attempts&#39;] = 0;
        $_SESSION[&#39;login_attempt_time&#39;] = time();
    }

    $_SESSION[&#39;login_attempts&#39;] ;
}
add_action(&#39;wp_login_failed&#39;, &#39;limit_login_attempts&#39;);

Notice:

  • It is recommended to back up the current theme file before adding to prevent errors.
  • This method requires you to have a certain understanding of PHP and WordPress hooks.
  • If the theme is changed, this code will fail and needs to be added again.

Combined with server layer protection, more secure

In addition to restricting login attempts at the WordPress level, you can also add protection from the server level, such as:

  • Limit the access frequency of /wp-login.php in .htaccess ;
  • Use the rate limiting features provided by Cloudflare or other CDNs;
  • Use firewall tools such as fail2ban to monitor and block exception IP.

These methods can be used as a supplementary means to improve overall security.

Basically these are the methods. Whether using plug-ins or code, setting the appropriate number of attempts and locking time can effectively improve WordPress's security, and it is not complicated to operate.

The above is the detailed content of How to limit login attempts in WordPress. For more information, please follow other related articles on the PHP Chinese website!

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