Do I need to install anything on my server?
No. Protection happens on our network, before traffic reaches your server, so there is nothing to upload and nothing to keep updated. If you later want your server to see real player IPs (for bans and logs), there is an optional step for that, and the dashboard walks you through it.
Will it slow down my server?
Not noticeably. Traffic passes through a filtering point close to your players, which adds a few milliseconds at most. You pick the region closest to your community (France, Germany, Poland or Canada) when you set up.
Is the free plan really free?
Yes. It's a permanent free tier for servers up to 20 concurrent players: no credit card, no time limit, no surprise bill. We offer it because small servers cost us very little to protect, and some of them grow into paying customers later.
I already use an anti-bot plugin. Do I still need this?
Yes, they solve different problems. Your anti-bot plugin handles fake players that reach your login screen. A DDoS filter stops floods that would saturate your connection before any plugin could react. Keep the plugin, add the filter in front.