How much RAM does CrowdSec need?

Plan on 1–2 GB for typical use; add headroom if you expect many concurrent users.

Can I run other things on the same VPS?

Yes — size the plan so CrowdSec plus your other workloads fit in RAM with room to spare.

Security

Collaborative, behaviour-based intrusion prevention.

Parse your logs, block abusive IPs locally, and optionally share signals with a community blocklist.

CrowdSec is a modern fail2ban successor that watches real behaviour and blocks attackers before they get far.

1
Provision a VPS
Choose a plan with room for your data as well as the app.
2
Install the stack
Install Single Go binary + bouncers.
3
Deploy the application
Follow the project’s official install guide for your distribution.
4
Enable HTTPS
Serve it on your own domain behind a reverse proxy with a certificate.
5
Back it up
Schedule a database dump plus a copy of any uploaded files to an off-box location.

Give CrowdSec its own database user with rights only on its own schema.
Reverse-proxy CrowdSec and terminate TLS at the proxy so certificates are managed in one place.
Take a VPS snapshot before major upgrades so you can roll back cleanly.
Keep CrowdSec patched — most self-hosting incidents are unpatched software.

How much RAM does CrowdSec need?: Plan on 1–2 GB for typical use; add headroom if you expect many concurrent users.
What stack does CrowdSec run on?: Single Go binary + bouncers.
Can I run other things on the same VPS?: Yes — size the plan so CrowdSec plus your other workloads fit in RAM with room to spare.

Looking for something else? Popular alternatives include fail2ban, OSSEC, Wazuh — browse all app guides.