Last updated: YYYY-MM-DD • Category: Lab Notes
A starter baseline for hardening a lab Linux VM with validation steps after each change.
Environment / assumptions
- IPs anonymized (e.g.,
10.0.x.0/30,fd00:xxxx::/64) - Simulated environment for demonstration (not production)
Procedure
- Updated packages and rebooted if required.
- Hardened SSH settings (key auth, disable root login) and verified access remains.
- Enabled firewall rules and tested allowed/blocked ports.
- Reviewed logs to confirm expected events are captured.
Verification
- List the outputs that prove success.
- Include command outputs (anonymized) when possible.
Troubleshooting
- Issue: …
- Cause: …
- Fix: …
Artifacts
- Configs, diagrams, logs