What Is Device Hardening? A Beginner-Friendly Guide

Word of the Week: Device Hardening

What is Device Hardening?

Device hardening is the process of securing a device by reducing its vulnerabilities. Most devices
come with default settings that prioritize convenience over security. Hardening involves
changing settings to improve protection against threats and unauthorized access.

Why It Matters

Unsecured devices are often the first point of entry for attackers. Whether it’s a laptop, server,
router, or smart device, proper hardening helps close common security gaps before they can be
exploited. This is a critical part of Defense in Depth.

Examples of Device Hardening Techniques:

• Change default usernames and passwords
• Disable unused ports and services
• Block unnecessary open network ports
• Keep firmware and software updated
• Enable firewalls and antivirus software
• Turn on system logging and auditing
• Apply the principle of least privilege
• Remove unnecessary applications and services

Final Thoughts

Device hardening is a foundational cybersecurity practice. Taking the time to secure your
devices, whether at home or in a business environment, helps reduce risk and prevent attacks
before they start. To learn more about how attackers try to exploit vulnerabilities, see What Are the Three Types of Hackers?.