New in version 2.0.0.

Changed in version 4.0.0: Entries can be ignored by prefixing with #

Changed in version 5.0.0: Entries can include IPv6 addresses. Added “Unknown Proxy in X-Forwarded-For” message.

A list of IP addresses for the trusted proxies that will appear as the remote IP for a request. When defined:

  • If the remote address appears in the WP_FAIL2BAN_PROXIES list, WPf2b will use the IP address from the X-Forwarded-For header
  • If the remote address does not appear in the WP_FAIL2BAN_PROXIES list and there is an X-Forwarded-For header, WPf2b will return a 403 error
  • If there’s no X-Forwarded-For header, WPf2b will behave as if WP_FAIL2BAN_PROXIES isn’t defined

To set WP_FAIL2BAN_PROXIES, add something like the following to wp-config.php:



The list is processed and cached for performance. Updating the list from the UI will automatically clear the cache, but you must do so manually if you are using a define().