Andrew Norcross

Jason Coleman

<p>WP Bouncer restricts the number of simultaneous logins for the same WordPress user account. The plugin’s goal is to deter people from sharing their login credentials for your site, which is especially important for a paid membership, premium content, or eLearning site.</p>
<h3>How WP Bouncer Protects Shared User Logins</h3>
<ul>
<li>The plugin stores a random <code>FAKESESSID</code> for each user when they log in.</li>
<li>If a user is logged in, on each page load (init hook), WP Bouncer checks if the <code>FAKESESSID</code> stored in the user’s cookies is the same as the last login stored in a transient (<code>fakesessid_user_login</code>).</li>
<li>If the two values do no match, WP Bouncer logs the user out and redirects them to the WordPress login page or a custom page using the wp_bouncer_redirect_url filter.</li>
</ul>
<p>If the WP_BOUNCER_HEARTBEAT_CHECK is defined to true, JavaScript will be loaded to bounce users when a new user logs in with the same login. This is useful for sites with page caching.</p>
<p>Admininstrator accounts or any users with the “manage_options” capability are excluded from bounces.</p>
<h3>Or, Allow a Specific Number of Active Sessions</h3>
<p>By default, WP Bouncer only allows one session per user.</p>
<p>You can use this plugin to offer bulk memberships to corporate, education, or other group-type customers via a shared login.</p>
<p>Use the <code>wp_bouncer_number_simultaneous_logins</code> filter to allow a defined number of active “sessions”.</p>
<p><a href="https://www.paidmembershipspro.com/limit-user-active-sessions/" rel="nofollow ugc">View the Recipe</a></p>
<h3>Example Use Cases for WP Bouncer</h3>
<ul>
<li>User A logs in as “user”. Their <code>FAKESESSID</code>, say “SESSION_A” is stored in a WordPress option.</li>
<li>User B logs in as “user”. Their <code>FAKESESSID</code>, say “SESSION_B” is overwrites the stored WordPress option.</li>
<li>User A tries to load a page on your site, WP Bouncer catches them and logs them out, redirecting them to the warning message.</li>
<li>User B can browse around the site as normal… unless…</li>
<li>User A logs in again as “user”. Their <code>FAKESESSID</code>, “SESSION_A_v2” is stored in the WordPress option.</li>
<li>Now user B would be logged out if they load another page.</li>
</ul>
<h3>Hooks and Filters</h3>
<ul>
<li><code>wp_bouncer_ignore_admins</code> filter: if returning false even admins will be bounced.</li>
<li><code>wp_bouncer_redirect_url</code> filter: can be used to change the URL redirected to after being bounced.</li>
<li><code>wp_bouncer_number_simultaneous_logins</code> filter: can be set to limit logins to a number other than 1. 0 means unlimited logins.</li>
<li><code>wp_bouncer_login_flag</code>: runs right before bouncing (can be used to potentially stop the bouncing).</li>
<li><code>wp_bouncer_session_ids</code> hook: used to filter session ids when saving them. Passes $session_ids, $old_session_ids (before any were removed/bounced), and the current user’s ID as parameters.</li>
<li><code>wp_bouncer_session_length</code> hook: used to filter how long the session ids transients are set. This way, you can time the transients to expire at a specific time of day. Note that the transient is saved on every page load, so if you set it to 5 minutes, it’s going to push it out 5 minutes on every page load. You should try to set it to (the number of seconds until midnight) or something like that.</li>
</ul>
<h3>Support the Plugin Authors</h3>
<p>If you like this plugin, please check out Jason’s work with <a href="https://www.strangerstudios.com" rel="nofollow ugc">Stranger Studios</a> and <a href="https://www.paidmembershipspro.com" rel="nofollow ugc">Paid Memberships Pro</a> and <a href="http://andrewnorcross.com/" rel="nofollow ugc">Andrew’s work at his personal site</a>.</p>


WP Bouncer – Limit Simultaneous Logins

Deter members from sharing login credentials: restrict simultaneous logins for the same user.

WPMU DEV - Your All-in-One WordPress Platform

<p><strong>Defender adds the best in WordPress plugin security to your website with just a few clicks, including malware scanner, firewall, password protection, and login security features. Stop brute force login attacks, weak password usage, SQL injections, cross-site scripting (XSS), and other WordPress security vulnerabilities and hacks with Defender’s malware scanner, providing antivirus scans, IP blocking, firewall, activity log, security log, and two-factor authentication (2FA) login security.</strong></p>
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<h3>Security Recommendations</h3>
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<ul>
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<li><strong>Two-Factor Authentication (2FA)</strong> – Easily set up better security with 2FA to prevent most login attacks such as brute force, App verification, backup codes, lost device email, WooCommerce 2FA, and Web Authentication.</li>
<li><strong>Login Masking</strong> – Change the location of WordPress’s default login area to improve login security.</li>
<li><strong>Login Lockout</strong> – Failed login attempts lockout for even more security assurance.</li>
<li><strong>User Agent Banning</strong> – Fortify security by blocking bad bots and user agents from accessing your site.</li>
<li><strong>Security Headers</strong> – Add an extra layer of defense security and protect against common attacks like: XSS, code injection, and more.</li>
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<li><strong>Disable Trackbacks And Pingbacks</strong> – Disable these notifications to enhance spam protection and site security.</li>
<li><strong>Core And Server Update Security Recommendations</strong> – Stay on top of your system security.</li>
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<li><strong>Disable File Editor</strong> – If they get in, they won’t get far.</li>
<li><strong>Hide Error Reporting</strong> – Hide code errors on the frontend so hackers can’t exploit site security.</li>
<li><strong>Update Security Keys</strong> – Update old WordPress security keys to be more encrypted and provide better security.</li>
<li><strong>Prevent Information Disclosure</strong> – Improve server security and protect sensitive files by locking down specific file types.</li>
<li><strong>Prevent PHP Execution</strong> – Defender bolsters security by automatically preventing any PHP code from being executed.</li>
<li><strong>Bulk Apply Security Recommendations</strong> – Apply multiple recommended security improvements at once for quicker site hardening.</li>
<li><strong>Google reCAPTCHA Security</strong> – Easy to add, stop fraud and abuse – including BuddyPress and WooCommerce.</li>
<li><strong>Cloudflare Turnstile</strong> – Protect your site from spam and automated attacks without annoying captchas.</li>
<li><strong>Pwned Password Check</strong> – Increase security by protecting against compromised passwords.</li>
<li><strong>Force Password Reset</strong> – Force users with selected roles to reset passwords.</li>
<li><strong>Force Strong Passwords</strong> – Ensure users create secure credentials by enforcing robust password requirements.</li>
<li><strong>User Agent Blocklist Presets</strong> – Easily block unwanted bots and scripts using curated user agent presets.</li>
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<li><strong>Session Protection (Pro Only)</strong> – Stop session hijacking and prevent unauthorized account access.</li>
<li><strong>Safe Repair For Suspicious Files (Pro Only)</strong> – Restore or replace compromised files safely with a single click.</li>
<li><strong>Automated Reports (Pro Only)</strong> – Receive scheduled security reports straight to your inbox.</li>
</ul>
<h3>Learn The Ropes With These Hands-On Defender Security Plugin Tutorials</h3>
<ul>
<li><a href="https://wpmudev.com/blog/how-to-get-the-most-out-of-defender-security/" rel="nofollow ugc">How to Get the Most Out of Defender Security</a></li>
<li><a href="https://wpmudev.com/blog/stop-hackers-with-defender-wordpress-security-plugin/" rel="nofollow ugc">How to Stop Hackers in Their Tracks with Defender Security</a></li>
<li><a href="https://wpmudev.com/blog/delete-suspicious-code-defender/" rel="nofollow ugc">Find Out if You’re Hacked: How to Find and Delete Suspicious Code with Defender Security</a></li>
<li><a href="https://wpmudev.com/blog/defender-ip-address-lockout-firewall/" rel="nofollow ugc">How to Create a Powerful and Secure Customized Firewall with Defender Security</a></li>
</ul>
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<p>Defender’s malware scanner security checks for suspicious code and malware. It also compares your WordPress install with the WP directory master copy, and reports any changes so you can restore the original file with a click.</p>
<h3>Two-Factor Authentication (2FA) Security</h3>
<p>Easily add an extra layer of protection and security to your WordPress sites with Defender’s two-factor authentication (2FA) features. Including: mobile app verification (Google Authenticator, Microsoft Authenticator, Authy), backup code generation, lost device emails, WooCommerce 2FA, Biometric Authentication (fingerprint/facial recognition), and Hardware Key Authentication (USB security keys). Easily prevent brute force attacks and login security vulnerabilities.</p>
<h3>Login Protection</h3>
<p>Brute force attacks are no match for Defender’s login security. Limit login attempts so hackers can’t guess passwords. Permanently ban IPs or trigger a timed lockout after a set number of failed login attempts. Use Geo IP blocking to ban users from specific countries or locations.</p>
<h3>Firewall Security and IP Manager</h3>
<p>Improve your website security with Defender’s IP manager and firewall. Manually block specific IPs, import a list of banned IPs, and set automated timed and permanent lockouts. Defender makes it easy to block and unblock specific locations quickly thanks to its advanced firewall security(WAF) offering Geographical IP blocking.</p>
<h3>User Agent Banning</h3>
<p>Add user agents to the block or allowlist and stop bad bots from spamming and scraping your site. All major search engines and special network bots are allow-listed out of the box. Easy to set up, Defender’s user agent banning tool now includes built-in bot and script presets to help you quickly block malicious traffic. It does all the security work for you—no editing of the .htaccess file required.</p>
<h3>Google reCAPTCHA Integration</h3>
<p>Add reCAPTCHA security to your login / registration pages, lost password forms, and post comments in a couple of steps to up security and help protect from fraud and abuse. Select reCAPTCHA type, language, location, and style to suit. As well as Google, Defender also supports the following reCAPTCHA types:</p>
<ul>
<li>BuddyPress reCAPTCHA</li>
<li>WooCommerce reCAPTCHA</li>
</ul>
<h3>Login Screen Masking</h3>
<p>Defender makes it easy to move your login screen to a custom URL. Not only does login screen masking improve security, but it also lets you white label your login user experience and improves branding.</p>
<h3>Force Password Reset</h3>
<p>Enhance site security by forcing all users with selected roles to reset their password at any time. Especially helpful if you suspect a possible data breach on your site.</p>
<h3>Security Headers</h3>
<p>Protect your site against common attacks, such as: XSS, code injection, cross site scripting, and more. Enable the following security headers:</p>
<ul>
<li>X-Frame-Options</li>
<li>X-XSS-Protection</li>
<li>X-Content-Type-Options</li>
<li>Strict Transport</li>
<li>Referrer Policy</li>
<li>Permissions-Policy</li>
</ul>
<h3>404 Limiter</h3>
<p>Detect when bots are being used to scan your site for security vulnerabilities and shut them down. The 404 limiter lets you stop the scan by detecting when a bot keeps visiting pages that do not exist, which can also save you from a giant strain on your site’s performance.</p>
<h3>Security Notifications and Reports</h3>
<p>Defender runs surveillance and sends security notifications with information that matters. All activity and notifications are recorded in the activity log to let you see at a glance the website security actions that have been taken by the Defender security plugin.</p>
<h3>Reduce Security Setup Time With Saved Configs</h3>
<p>Save your Defender security plugin configurations and reapply them to your other sites in just a few clicks. You can create and save an unlimited number of security configurations.</p>
<h3>Pwned Password Check</h3>
<p>Entered passwords are checked against public database breach records to further boost security. If a password is identified as compromised, the user will be asked to change it.</p>
<h3>Custom IP Block/Allowlist</h3>
<p>Create your IP block/allow list once, then apply and automatically sync it to all your other sites with just a single click. Save hours by not having to manually add IPs to each individual site. *Note: a [free WPMU DEV account] (https://wpmudev.com/register) is required to access this feature.</p>
<h3>What Do People Say About Defender?</h3>
<p>★★★★★<br />
“I found other pro security plugins a bit too fiddly for my taste…I’m delighted with Defender” – <a href="https://profiles.wordpress.org/keithadv" rel="nofollow ugc">KeithADV</a></p>
<p>★★★★★<br />
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<p>★★★★★<br />
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<p>★★★★★<br />
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<h3>Secure Websites, More Trust, Better Profit</h3>
<p>If you’re running a business website or eCommerce store, privacy, security, uptime and trust are essential.</p>
<p>The Defender security plugin is here to help you: it’s a one of a kind WordPress security plugin that makes web security easy for anyone, for free!</p>
<ul>
<li>Malware scanner</li>
<li>Google two-factor authentication (2FA)</li>
<li>Web Authentication</li>
<li>Firewall setup and configuration</li>
<li>One-click site hardening and security tweaking</li>
<li>WordPress core file scanning and repair</li>
<li>Ongoing firewall security</li>
<li>Google reCAPTCHA</li>
<li>Security headers</li>
<li>One-click security configs</li>
<li>Login Screen Masking</li>
<li>Pwned Password Check</li>
<li>IP Blocklist manager and logging</li>
<li>Geo IP blocking</li>
<li>User agent banning</li>
<li>Unlimited file scans</li>
<li>Timed Lockout brute force login attack shield for login security</li>
<li>404 limiter for blocking vulnerability scans</li>
<li>IP lockout notifications and security reports</li>
</ul>
<p>All the above is free and will enhance WordPress security for you. If you need extra security for your WordPress site, <a href="https://wpmudev.com/?utm_source=wordpress.org&utm_medium=readme&utm_campaign=defender-readme&utm_content=you_should_get_wpmudev_membership#trial" rel="nofollow ugc">you should get a WPMU DEV Membership</a>.</p>
<p>Our Membership gives you access to Defender Pro – which security features include automated scanning, scheduled malware scans for Core, themes, plugins and other files, audit logs, firewall protection, Safe Repair, Blocklist monitoring – alongside Snapshot Pro cloud backups, the Hub with automated plugin, theme and core updates and safe-upgrade scans, all our premium WordPress plugins, 24/7 WordPress support and if your sites already been hacked our team of security experts will clean it up at no additional cost.</p>
<p><a href="https://wpmudev.com/?utm_source=wordpress.org&utm_medium=readme&utm_campaign=defender-readme&utm_content=and_you_can_find_out_more_here#trial" rel="nofollow ugc">It’s an incredible deal, and you can find out more here</a>.</p>
<h3>About Us</h3>
<p>WPMU DEV is a premium supplier of quality WordPress plugins and themes. For premium support with any WordPress-related issues you can join us here:<br />
<a href="https://wpmudev.com/?utm_source=wordpress.org&utm_medium=readme&utm_campaign=defender-readme&utm_content=wpmu_dev_link" rel="nofollow ugc">https://wpmudev.com/</a></p>
<p>Don’t forget to stay up to date on everything WordPress from the Internet’s number one resource:<br />
<a href="https://wpmudev.com/?utm_source=wordpress.org&utm_medium=readme&utm_campaign=defender-readme&utm_content=wpmu_dev_blog_link" rel="nofollow ugc">WPMU DEV Blog</a></p>
<p>Hey, one more thing… we hope you <a href="https://profiles.wordpress.org/WPMUDEV/" rel="nofollow ugc">enjoy our free offerings</a> as much as we’ve loved making them for you!</p>


Defender Security – Malware Scanner, Login Security & Firewall

WordPress security plugin with malware scanner, IP blocking, audit logs, antivirus scans, firewall, 2FA, brute force login security, and more.

WP Bouncer – Limit Simultaneous Logins vs Defender Security – Malware Scanner, Login Security & Firewall