# Device Hardening Best Practices

> Master device hardening techniques to reduce attack surfaces, secure configurations, and prevent unauthorized access across enterprise infrastructure.

Canonical: https://codelivly.com/rooms/device-hardening-best-practices
Last updated: 2026-09-05

| | |
|---|---|
| Level | Intermediate |
| Category | Networking |
| Lessons | 4 |
| Estimated time | 30 min |
| XP | 200 |

Device hardening is the critical process of securing systems by systematically reducing their surface of vulnerability. This module explores foundational and advanced best practices for hardening network devices, servers, and endpoints. You will learn how to disable unnecessary services, enforce strong authentication, implement strict access controls, and configure comprehensive logging and monitoring. From a cybersecurity perspective, unhardened devices are the lowest-hanging fruit for attackers, frequently serving as the initial point of compromise for lateral movement. You will discover how defenders apply industry-standard security baselines (like CIS Benchmarks), manage secure configurations via Infrastructure as Code (IaC), and continuously monitor for configuration drift to build a resilient, defense-in-depth architecture.

## Lessons

1. What Is Device Hardening and Why Does It Matter (30 min)
2. Securing Management Plane Access (SSH, AAA) (30 min)
3. Disabling Unused Services & Ports (30 min)
4. Guided Lab: Hardening a Router/Switch Configuration (30 min)

## Related

- [Learning path: Network Security and Hardening](https://codelivly.com/learning-paths/network-security-and-hardening)
- [All rooms](https://codelivly.com/rooms)