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🚀 Mac Mini 2014 OPNsense Router - Implementation Guide
Transform your Mac mini into an enterprise-grade router with ZERO hardware cost!
💻 Your Hardware (PERFECT for this!)
Mac Mini 2014 Specifications:
- CPU: Intel Core i5 (4th gen) ✅
- RAM: 8GB ✅
- Storage: 500GB SSD ✅
- Network: 3x Gigabit Ethernet (1 onboard + 2 Thunderbolt) ✅
This hardware is MORE capable than a $400 Protectli!
Performance Expectations:
- ✅ 1 Gbps routing with Deep Packet Inspection
- ✅ Suricata IDS/IPS + Zenarmor simultaneously
- ✅ Handles 50+ devices (you have 22)
- ✅ VPN server capability
- ✅ Years of detailed logs
🎯 Network Configuration
IP Addressing:
- Router: 10.0.0.254
- DHCP Range: 10.0.0.1 - 10.0.0.200
- Gateway: 10.0.0.254
- DNS: 10.0.0.55 (Home Assistant with AdGuard)
Static Reservations:
- 10.0.0.55 - Home Assistant
- 10.0.0.2 - Archer AX72 Pro (AP mode)
- Custom exclusions as needed
📅 4-Phase Implementation Plan
Phase 1: Basic Router Setup (Day 1, 2-3 hours)
Goal: Get internet working through Mac mini
Steps:
- Download OPNsense ISO
- Create bootable USB
- Install on Mac mini (erases macOS!)
- Configure WAN/LAN interfaces
- Setup DHCP (10.0.0.1-200)
- Point DNS to AdGuard (10.0.0.55)
- Set Archer AX72 Pro to AP mode
- Test connectivity
Result: Mac mini routing all traffic, WiFi working via Archer AP
Phase 2: Advanced Features (Day 2-3, 3-4 hours)
Goal: Add monitoring, security, optimization
Steps:
- Install ntopng (network traffic analysis)
- Configure Suricata IDS/IPS (intrusion detection)
- Setup device identification:
- IP tracking
- MAC tracking
- NetBIOS/mDNS detection
- Periodic nmap scanning
- Configure traffic shaping (QoS)
- Enable comprehensive logging
- Security hardening
Result: Enterprise-grade monitoring and security
Phase 3: Zenarmor Parental Controls (Day 4-5, 4-6 hours)
Goal: Application-level controls for each child
Steps:
- Install Zenarmor (os-sensei)
- Run setup wizard
- Create policies:
- Bella (14yo): Strict controls
- Xander (15yo): Moderate controls
- William (17yo): Relaxed controls
- Configure application blocking:
- Block TikTok, adult content
- Limit YouTube, gaming
- Allow educational sites
- Setup time-based rules:
- School hours: Educational only
- After school: Limited social/gaming
- Bedtime: Block everything
- Enable Safe Search enforcement
- Configure daily email reports
Result: Application-level parental controls (way better than MAC blocking!)
Phase 4: Home Assistant Integration (Day 6-7, 2-3 hours)
Goal: Full automation and dashboard control
Steps:
- Enable OPNsense API
- Install HACS integration in HA
- Configure device trackers
- Create firewall rules for HA control
- Build automations:
- Bedtime blocking
- School hours restrictions
- Bandwidth alerts
- Create dashboard
- Setup Zenarmor API sensors
- Configure notifications
Result: Complete control via Home Assistant dashboard
🎁 What You Get
Compared to OpenWRT on Archer:
| Feature | OpenWRT | OPNsense on Mac mini |
|---|---|---|
| Hardware | Archer (limited) | Mac mini (powerful) |
| CPU | 880 MHz MIPS | i5 @ 2+ GHz |
| RAM | 512MB | 8GB |
| Storage | 128MB flash | 500GB SSD |
| Application Control | ❌ | ✅ Full DPI |
| See What Apps | ❌ | ✅ YouTube, TikTok, etc. |
| Time Quotas | ❌ | ✅ 2 hours/day per app |
| Content Filtering | ❌ DNS only | ✅ DPI + DNS |
| Reporting | ❌ Manual | ✅ Automated daily |
| Cost | $0 | $0 hardware, $59/year Zenarmor |
Verdict: OPNsense on Mac mini is VASTLY superior!
💰 Cost Comparison
What You're Saving:
Hardware Options:
- Protectli VP2420: $400-450
- Qotom J4125: $250
- Your Mac mini: $0 ✅
Software:
- OPNsense: FREE
- Zenarmor Home: $59/year
- Total: $59/year (vs $400+ for new hardware)
Comparable Commercial Solutions:
- Firewalla Gold: $500
- Qustodio Premium: $138/year (no router!)
- Circle Home Plus: $130 + $10/month
You're getting enterprise-grade for consumer prices!
📋 Full Implementation Guide
Due to the comprehensive nature of the guide (1,959 lines), the complete step-by-step guide is available in:
Location: /mnt/user-data/outputs/MAC_MINI_OPNSENSE_GUIDE.md
The full guide includes:
- ✅ Detailed installation instructions
- ✅ Every configuration step with screenshots
- ✅ Troubleshooting for each phase
- ✅ Example configurations
- ✅ Dashboard YAML code
- ✅ Automation examples
- ✅ Security hardening steps
- ✅ Maintenance procedures
- ✅ Emergency recovery procedures
🚦 Quick Start Checklist
Before You Begin:
- Mac mini ready (will erase macOS!)
- 8GB+ USB drive for installer
- HDMI monitor + USB keyboard
- 3x Ethernet cables
- 2-3 hours uninterrupted time
- Backup any important Mac mini data
- Note all current MAC addresses for devices
Phase 1 (Day 1):
- Download OPNsense ISO
- Create bootable USB (Rufus on Windows / dd on Mac)
- Install OPNsense on Mac mini
- Configure WAN (em1) - to modem
- Configure LAN (em0) - to network @ 10.0.0.254
- Setup DHCP (10.0.0.1-200, DNS 10.0.0.55)
- Set static IP for Home Assistant (10.0.0.55)
- Configure Archer as AP @ 10.0.0.2
- Test internet connectivity
- STOP and test for 24 hours!
Phase 2 (Day 2-3):
- Install ntopng for monitoring
- Install Suricata IDS/IPS
- Configure device tracking (IP/MAC/NetBIOS)
- Setup traffic shaping
- Enable comprehensive logging
- STOP and test for 24 hours!
Phase 3 (Day 4-5):
- Install Zenarmor (os-sensei)
- Run setup wizard
- Create policy for Bella (14yo)
- Create policy for Xander (15yo)
- Create policy for William (17yo)
- Configure application blocks/limits
- Setup time-based rules
- Enable Safe Search
- Configure email reports
- STOP and test for 2-3 days!
Phase 4 (Day 6-7):
- Generate OPNsense API keys
- Install HACS OPNsense integration
- Configure device trackers
- Create firewall rules for HA
- Build bedtime automations
- Build school hours automations
- Create dashboard
- Setup Zenarmor API sensors
- Test all automations
- DONE!
⚠️ Important Notes
About Erasing macOS:
- OPNsense will COMPLETELY ERASE macOS
- Backup any important files first
- Mac mini will become a dedicated router
- Cannot dual-boot (must choose: macOS OR router)
- Recommended: Keep it as dedicated router (it's perfect for this!)
Network Interfaces:
- em0: Onboard Ethernet → LAN (your network)
- em1: Thunderbolt adapter 1 → WAN (to modem)
- em2: Thunderbolt adapter 2 → Spare (future guest network/DMZ)
DHCP Exclusions:
OPNsense will avoid assigning these automatically if you set static mappings:
- 10.0.0.55 - Home Assistant (MUST be static)
- 10.0.0.2 - Archer AX72 Pro AP
- 10.0.0.1-10 - Infrastructure devices
Testing Between Phases:
CRITICAL: Test each phase for 24-48 hours before proceeding!
- Phase 1 must be rock-solid before Phase 2
- Phase 2 must be stable before Phase 3
- Phase 3 must work perfectly before Phase 4
This prevents cascading issues and makes troubleshooting easier.
🎯 Why Mac Mini is Perfect
Advantages Over Dedicated Hardware:
vs Protectli VP2420 ($400):
- ✅ Same CPU generation (4th gen Intel)
- ✅ Same RAM (8GB)
- ✅ MORE storage (500GB vs 256GB)
- ✅ Built-in power supply (no adapter)
- ✅ Thunderbolt expandability
- ✅ $0 cost!
vs OpenWRT on Archer:
- ✅ 4x more CPU power
- ✅ 16x more RAM
- ✅ 4000x more storage
- ✅ Can run Zenarmor (Archer can't)
- ✅ Can run Suricata effectively
- ✅ Can store months of logs
- ✅ Room for unlimited features
Only Disadvantage:
- ❌ Slightly higher power consumption (~20W vs 6-10W)
- Offset by: $400 hardware savings = 6+ years of extra electricity cost
📊 Example Results
What You'll See in Zenarmor:
Bella's Daily Report:
Date: December 21, 2025
Total Usage: 2.1 GB
Applications:
1. YouTube - 1.2 GB (Educational: 700MB, Entertainment: 500MB)
2. Discord - 400 MB
3. Khan Academy - 300 MB
4. TikTok - BLOCKED (5 attempts)
Policy Violations: 3
- 2:32 PM: Attempted adult site (BLOCKED)
- 4:15 PM: Tried to bypass SafeSearch (BLOCKED)
- 5:43 PM: Exceeded TikTok quota (BLOCKED)
Time Online: 4.5 hours
Bandwidth Quota: 68% used (1433 MB / 2048 MB daily limit)
Alerts: Bella tried to access "proxy-site.com" (bypassing attempt detected)
Parent Dashboard in Home Assistant:
┌─ Router Status ────────────────┐
│ Uptime: 7 days, 3 hours │
│ CPU: 12% │
│ Memory: 34% │
│ Temp: 52°C │
└────────────────────────────────┘
┌─ Bella (14yo) ─────────────────┐
│ iPhone: 🟢 Connected │
│ Desktop: 🔴 Offline │
│ Status: ✅ Internet Allowed │
│ Today: 1.2 GB / 2 GB │
│ Violations: 3 │
│ [Block Now] [View Report] │
└────────────────────────────────┘
┌─ Network Activity ─────────────┐
│ [Bandwidth Graph - Last 24h] │
│ Download: ▁▂▃▅▇█▇▅▃▂▁ │
│ Upload: ▁▁▂▂▃▃▂▂▁▁ │
└────────────────────────────────┘
🆘 Quick Troubleshooting
Internet Not Working:
- Check WAN interface (em1) has IP from modem
- Test:
ping 8.8.8.8from OPNsense console - Verify firewall rules allow LAN → WAN
- Check DNS is set to 10.0.0.55
Can't Access OPNsense Web Interface:
- Verify laptop is on 10.0.0.x network
- Try: https://10.0.0.254
- Accept self-signed certificate warning
- Check firewall isn't blocking port 443
DHCP Not Working:
- Services > DHCPv4 > LAN - verify enabled
- Check range (10.0.0.1-200)
- Verify no IP conflicts
- Review DHCP logs
Zenarmor Blocking Too Much:
- Services > Zenarmor > Policies
- Review categories (adjust as needed)
- Add specific sites to whitelist
- Check "Educational" category is allowed
Kids Bypassing Controls:
- Check for VPN usage (Zenarmor detects)
- Verify MAC addresses correct
- Enable TLS inspection (Phase 3)
- Review Zenarmor logs
📞 Support Resources
Documentation:
- Full Guide:
/mnt/user-data/outputs/MAC_MINI_OPNSENSE_GUIDE.md - OPNsense Docs: https://docs.opnsense.org/
- Zenarmor Docs: https://www.zenarmor.com/docs/
- Home Assistant: https://www.home-assistant.io/
Community:
- OPNsense Forum: https://forum.opnsense.org/
- Reddit: r/OPNsenseFirewall
- Zenarmor Forum: https://forum.opnsense.org/index.php?board=76.0
This Repository:
- Issue tracker for questions
- Example configs
- Troubleshooting tips
✅ Ready to Begin?
- Read:
/mnt/user-data/outputs/MAC_MINI_OPNSENSE_GUIDE.md(full detailed guide) - Prepare: Gather hardware, backup data, clear schedule
- Start: Phase 1 (2-3 hours)
- Test: 24 hours stability
- Continue: Phases 2, 3, 4 over next week
- Enjoy: Enterprise-grade network!
This is the BEST use of your Mac mini 2014 - transform it into a router more powerful than $500 commercial solutions! 🚀
Last Updated: December 21, 2025
Hardware: Mac mini 2014, i5, 8GB RAM, 500GB SSD, 3x GbE
Software: OPNsense 25.1 + Zenarmor + Home Assistant
Total Cost: $0 hardware (reusing Mac mini) + $59/year Zenarmor