aaronlbpeterman there's currently no extension that blocks VPN access, as far as I know.
You can always request it by creating a new discussion here with the "Feedback" tag though. Until then, you will sadly need to block all IPs and accounts manually...
For everyone else, I am going to upgrade FreeFlarum to a newer MariaDB version, so I can install some of the most requested extensions, that are compatible only with that version (and not the one that FreeFlarum uses). We already handled PHP 8 update pretty well, so I am going to try and upgrade MariaDB too. There will be a downtime, obviously, so I apologize for that. I hope that everything goes well and that FreeFlarum will be back up again soon.
Edit: Checking all databases right now. We're at letter Z
, I think it'll take about 30 minutes for all forums Done! Now to finish it and bring it back online.