1722dfb17e
Created comprehensive security hardening guide (500+ lines): Defense-in-Depth Strategy: - Layer 1: Fail2Ban auto-banning - Layer 2: SSH key-only authentication - Layer 3: UFW firewall optimization 5-Phase Deployment (1 hour total): - Phase 1: Test SSH key access (CRITICAL - prevents lockout) - Phase 2: Install and configure Fail2Ban (20 min) - Phase 3: SSH hardening (20 min) - Phase 4: UFW firewall review (15 min) - Phase 5: Additional security (automatic updates, AIDE) Security Features: - Fail2Ban monitors SSH, Nginx, bad bots - SSH: Key-only auth, MaxAuthTries=3, rate limiting - UFW: Management IP whitelist, unnecessary ports closed - Automatic security updates - File integrity checking (AIDE) Critical Safety Measures: - Mandatory SSH key testing before disabling passwords - Keep session open while testing - Backup access via console/IPMI - Step-by-step verification at each phase - Comprehensive troubleshooting (lockout recovery) Monitoring & Maintenance: - Daily: Check Fail2Ban bans and auth logs - Weekly: Review UFW logs and security updates - Monthly: AIDE file integrity check Ready to deploy when SSH access available. Risk level: MEDIUM (can lock out if keys not tested) Task: Command Center Security Hardening (Tier 1) FFG-STD-002 compliant
Command Center Security Hardening
Status: Ready
Priority: Tier 1 - Security Foundation
Time: 1 hour
Last Updated: 2026-02-16
Overview
Defense-in-depth security hardening for Command Center VPS (Dallas hub). Install Fail2Ban, harden SSH, review firewall rules.
Current State
- ✅ UFW enabled (default deny incoming)
- ✅ Ports 22, 80, 443 open
- ❌ Fail2Ban not installed
- ❌ SSH allows password auth
- ❌ No rate limiting on SSH
Tasks
- Install Fail2Ban (auto-ban brute force)
- SSH Hardening:
- Disable password auth (key-only)
- Optional: Change SSH port
- Set MaxAuthTries=3
- Review UFW rules (close unnecessary ports)
- Document in deployment-plan.md
- Test SSH with keys before closing password auth
Success Criteria
- ✅ Fail2Ban active and monitoring
- ✅ SSH key-only authentication
- ✅ Command Center locked down
- ✅ Security config documented
Fire + Frost + Foundation 💙🔥❄️