Stop User Enumeration vs WP fail2ban – Advanced Security

Stop User Enumeration is a security plugin designed to detect and prevent hackers scanning your site for user login names. User Enumeration is a type of attack where nefarious parties can probe your website to discover your login name. This is often a pre-cursor to brute-force password attacks. Stop User Enumeration helps block this initial attack and allows you to log IPs launching these attacks to block further attacks in the future. Tools like WPSCAN are designed for use by ethical hackers and make efforts to find user login names. Ethical hackers ask permission first, this plugin is designed to reduce the tools when used without permission and when used in conjunction with fail2ban can block those attempts at the firewall. If you are on a VPS or dedicated server, as the attack IP is logged, you can use (optional additional configuration) fail2ban to block the attack directly at your server’s firewall, a very powerful solution for VPS owners to stop brute force attacks as well as DDoS attacks. If you don’t have access to install fail2ban ( e.g. on a Shared Host ) you can still use this plugin. The plugin can stop the user id being leaked by the oEmbed API call. Since WordPress 4.5 user data can also be obtained by API calls without logging in, this is a WordPress feature, but if you don’t need it to get user data, this plugin will restrict and log that too. Since WordPress 5.5 sitemaps are generated by core WP ( wp-sitemap.xml ) which includes a user/author sitemap that exposes the user id. You can enable / disable this in the plugin settings. PHP 8.4 compatible Tested on PHP 8.4 Features Include Blocks user enumeration requests by GET or POST Syslogs a block so Fail2Ban can be used to block an IP Optionally blocks REST API user requests for non authorized users Optionally removes author sitemap Optionally removes author from OEMBED Optionally removes numbers from comment authors Privacy This plugin includes an optional email feature for plugin news and updates. When enabled: Your email address may be sent to https://fullworksplugins.com for important plugin updates and security notices This is completely optional and requires your explicit consent via the opt-in form in the plugin settings No data is collected or transmitted without your permission You can opt-out at any time from the plugin settings No other personal data is collected or transmitted to external services The plugin logs attempted user enumeration attacks locally using WordPress’s standard logging system: * IP addresses of potential attackers are logged locally for security monitoring * These logs remain on your server and are not transmitted to any external service * Logs can be used with fail2ban or similar tools for enhanced security For more information about data handling, please visit https://fullworksplugins.com/privacy-policy/

fail2ban is one of the simplest and most effective security measures you can implement to protect your WordPress site. WP fail2ban provides the link between WordPress and fail2ban: Oct 17 20:59:54 foobar wordpress(www.example.com)[1234]: Authentication failure for admin from 192.168.0.1 Oct 17 21:00:00 foobar wordpress(www.example.com)[2345]: Accepted password for admin from 192.168.0.1 WPf2b comes with three fail2ban filters: wordpress-hard.conf, wordpress-soft.conf, and wordpress-extra.conf. These are designed to allow a split between immediate banning (hard) and the traditional more graceful approach (soft), with extra rules for custom configurations. Features Failed Login Attempts The very first feature of WPf2b: logging failed login attempts so the IP can be banned. Just as useful today as it was then. Block User Enumeration One of the most common precursors to a password-guessing brute force attack is user enumeration. WPf2b can block it, stopping the attack before it starts. Block username logins Sometimes it’s not possible to block user enumeration (for example, if your theme provides Author profiles). WPf2b can require users to login with their email address instead of their username. Blocking Users Anther of the older WPf2b features: the login process can be aborted for specified usernames. Say a bot collected your site’s usernames before you blocked user enumeration. Once you’ve changed all the usernames, add the old ones to the list; anything using them will trigger a “hard” fail. Empty Username Login Attempts Some bots will try to login without a username; harmless, but annoying. These attempts are logged as a “soft” fail so the more persistent bots will be banned. Spam WPf2b will log a spammer’s IP address as a “hard” fail when their comment is marked as spam; the Premium version will also log the IP when Akismet discards “obvious” spam. Attempted Comments Some spam bots try to comment on everything, even things that aren’t there. WPf2b detects these and logs them as a “hard” fail. Pingbacks Pingbacks are a great feature, but they can be abused to attack the rest of the WWW. Rather than disable them completely, WPf2b effectively rate-limits potential attackers by logging the IP address as a “soft” fail. Block XML‑RPC Requests [Premium] The only reason most sites need XML‑RPC (other than Pingbacks) is for Jetpack; WPf2b Premium can block XML‑RPC while allowing Jetpack and/or Pingbacks. Block Countries [Premium] Sometimes you just need a bigger hammer – if you’re seeing nothing but attacks from some countries, block them! Cloudflare and Proxy Servers WPf2b will work with Cloudflare, and the Premium version will automatically update the list of Cloudflare IP addresses. You can also configure your own list of trusted proxies. syslog Dashboard Widget Ever wondered what’s being logged? The dashboard widget shows the last 5 messages; the Premium version keeps a full history to help you analyse and prevent attacks. Site Health Check WPf2b will (try to) check that your fail2ban configuration is sane and that the filters are up to date; out-of-date filters are the primary cause of WPf2b not working as well as it can. When did you last run the Site Health tool? mu-plugins Support WPf2b can easily be configured as a “must-use plugin” – see Configuration. API to Extend WPf2b If your plugin can detect behaviour which should be blocked, why reinvent the wheel? Event Hooks [Premium] Need to do something special when WPf2b detects a particular event? There’s a hook for that. Premium Web Application Firewall (WAF) Akismet support. Block XML‑RPC while allowing Jetpack and/or Pingbacks. Block Countries. Auto-update Cloudflare IPs. Event log. Event hooks.