---
title: "HOST-IDS-001 No Brute-Force Protection Service"
canonical: https://openvapt.com/checks/HOST-IDS-001.html
html: https://openvapt.com/checks/HOST-IDS-001.html
site: OpenVAPT, https://openvapt.com/
license: OpenVAPT Source-Available Licence 1.3, https://openvapt.com/legal/licence-text.html
modified: 2026-10-14
version: 0.1.0-alpha.6
---

# HOST-IDS-001 No Brute-Force Protection Service

Checks that a log-based intrusion prevention service (fail2ban, sshguard or CrowdSec) is running.

- Domain: Server
- Severity: Low
- Control category: Logging and Monitoring
- Fix effort: low
- CVSS v3.1 vector: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N`
- CIS Controls v8: 8.2
- NIST CSF 2.0: PR.PS-04
- CWE: CWE-307
- OWASP Top 10 2021: A07:2021
- NIST SP 800-53 Rev. 5: SI-4, AC-7

## Why It Matters

Internet-facing services receive constant guessing. Automatically blocking sources that fail repeatedly reduces noise and risk, and turns logs into active defence.

## How It Detects

Asks systemd whether fail2ban, sshguard or crowdsec is active.

## How to Fix

Install and enable one, for example: apt install fail2ban && systemctl enable --now fail2ban , with an sshd jail enabled.

## How to Verify

```
systemctl is-active fail2ban
```

## Learn the Theory

- [P16 Logging, Auditing and Time](https://openvapt.com/academy/p16.md)

## References

- [fail2ban project](https://github.com/fail2ban/fail2ban)
- [NIST SP 800-53 Rev. 5, Security and Privacy Controls](https://csrc.nist.gov/pubs/sp/800/53/r5/upd1/final)

## Source Code

https://github.com/OpenVAPT/openvapt/blob/574f7f3333c44b75a3c649e2d93a76d507f75adf/internal/checks/host/hardening.go

Run it: `openvapt scan --only HOST-IDS-001`. Read it offline: `openvapt explain HOST-IDS-001`.

---

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