Alexa Amundson
d5c8667284
RoadChain-SHA2048: 428ab11c02ce78d6 RoadChain-Identity: alexa@sovereign RoadChain-Full: 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
2.6 KiB
Alexa Amundson
Security Engineer
amundsonalexa@gmail.com | github.com/blackboxprogramming
Summary
Security engineer who identified and remediated malware, credential leaks, and misconfigurations across a 7-node distributed fleet. Implements zero-trust networking via Cloudflare tunnels, WireGuard encryption, firewall policies, and credential management across 256 managed services.
Experience
BlackRoad OS | Founder & Security Lead | 2024–Present
Incident Response
- Discovered and removed obfuscated cron dropper executing from /tmp/op.py (Cecilia)
- Identified leaked GitHub PAT (gho_Gfu...) in Lucidia service file, initiated rotation
- Found and investigated xmrig crypto miner service configuration on Lucidia
- Migrated credentials from plaintext crontabs to secured env files (chmod 600) fleet-wide
Network Security
- Zero-trust architecture: all external access through 4 Cloudflare tunnels (no exposed ports)
- WireGuard encryption for all inter-node communication (10.8.0.x mesh)
- UFW firewall with INPUT DROP policy on edge nodes
- Tailscale ACLs for management access (9 peers)
Access Management
- SSH key audit: identified 50+ keys on Alice and Octavia requiring cleanup
- NOPASSWD sudo policies documented across all nodes
- Identified 3 Tailscale ghost nodes (offline 15+ days) for decommissioning
- Per-user cron job audit across all fleet nodes
Infrastructure Hardening
- Disabled 16 unused skeleton microservices (freed 800 MB RAM, reduced attack surface)
- Masked crash-looping services (rpi-connect-wayvnc) to prevent service abuse
- Removed overclock settings causing instability
- Secured GitHub relay credentials in ~/.github-relay.env (chmod 600)
Monitoring & Detection
- Self-healing autonomy scripts detecting and restarting failed services
- 12 failed systemd units tracked and investigated daily
- Fleet-wide power monitoring detecting anomalous CPU usage
- Daily KPI collection tracking security-relevant metrics
Technical Skills
Security: Incident response, credential management, malware removal, hardening Networking: WireGuard, Cloudflare Tunnels (zero-trust), UFW, nftables, Tailscale Linux: systemd, SSH, file permissions, audit, service isolation Monitoring: Custom KPI system, anomaly detection, SSH probes Tools: Bash (212 CLI tools), Python, GitHub CLI
Metrics
| Metric | Value |
|---|---|
| Incidents remediated | 5+ |
| Services managed | 256 |
| Firewall policies | UFW + nftables |
| VPN tunnels | 4 CF + 7 WG |
| Services disabled | 16+ |
| Credentials rotated | 4+ |
| Fleet nodes secured | 7 |