Fatal error: Cannot redeclare wp_login_failed()

It looks like you’ve got an old version in mu-plugins. The best way to use WPf2b with mu-plugins is with a symlink – exactly to prevent this kind of thing. See https://docs.wp-fail2ban.com/en/3.6/configuration.html#mu-plugins-support

• This reply was modified 6 years, 2 months ago by invisnet.

I assume that solved the problem.

Thanks invisnet.

Right, I’m using a Digital Ocean One-Click-WP Droplet and seems like they’ve got WPf2b preinstalled.

/var/www/html/wp-content/mu-plugins$ ll
-rw-r–r– 1 www-data www-data 9051 Aug 21 2016 wp-fail2ban.php

I removed the file from mu-plugins and installed/activated WPf2b from the Plugins backend.

I was wondering if I additionally should do the symlink suggestion you’ve made now. Necessary? What’s the advantage of that?

• This reply was modified 6 years, 1 month ago by alexhaid.
• This reply was modified 6 years, 1 month ago by alexhaid.

So they have (I just fired up a test droplet).

While it’s nice to see them installing it by default, it would have been even nicer if they’d let me know so I could cover it in the docs. I shall have a chat with them.

Anyway, you don’t need to add the symlink unless you need to run WPf2b as a mu plugin. You probably don’t, so you probably don’t ??