Linux Hardening

Secure Linux servers following CIS benchmarks and security best practices.

When to Use This Skill

Use this skill when:

• Hardening production servers
• Meeting compliance requirements
• Implementing security baselines
• Configuring secure SSH access

Target and recovery

Confirm distribution/version, selected CIS profile, current service config and user-authorized changes. Keep a known-working access session and out-of-band recovery, back up affected files privately, preview changes and validate before reload. These examples are fragments, not a universal CIS-compliance script. Do not apply firewall/default-deny rules before verifying management access and IPv4/IPv6 requirements.

SSH Hardening