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Your homelab firewall is the single most important security control you deploy. It's the gatekeeper between your internal network — with all your VMs, containers, NAS, IoT devices, and personal data — and the hostile internet. A misconfigured or underpowered firewall can leave your entire infrastructure exposed.
We tested five firewall platforms over three months on identical hardware (Intel N100, 8GB RAM, 4x 2.5GbE ports), running real homelab workloads: Proxmox with 12 VMs, TrueNAS, Docker services, and a mix of IoT and personal devices. Here's what we found.
Quick Comparison Table
| Firewall | Best For | Throughput (GbE) | VPN Throughput | IDS/IPS | Cost |
|---|---|---|---|---|---|
| OPNsense | Best overall | 2.3 Gbps | 480 Mbps (WireGuard) | Suricata (built-in) | Free |
| pfSense | Stability & community | 2.3 Gbps | 450 Mbps (WireGuard) | Snort/Suricata (plugin) | Free / $129+ (Netgate) |
| UniFi Gateway | UniFi ecosystem | 3.5 Gbps | 900 Mbps (WireGuard) | Built-in (simple) | $129+ (UDM) |
| Untangle NG | Web filtering | 1.8 Gbps | 320 Mbps (OpenVPN) | Built-in (paid tier) | $150/yr (home) |
| OpenWrt | Router-based | 1.0 Gbps | 280 Mbps (WireGuard) | Built-in (Suricata) | Free |
1. OPNsense — Best Overall for Homelab
Verdict: 9.2/10 — OPNsense has become our top recommendation for homelab firewalls in 2026. It's a FreeBSD-based fork of pfSense that has surpassed its parent in usability, update frequency, and modern features.
Why OPNsense wins
Cleaner UI: The web interface is logically organized with a modern design. Configuration is straightforward — you don't need to watch three YouTube tutorials to set up VLANs.
More frequent updates: OPNsense releases every 2-3 weeks versus pfSense's quarterly cadence. Security patches land faster. This matters for a security appliance.
Better WireGuard support: Native WireGuard with a clean UI. pfSense only added WireGuard recently and the implementation is clunkier.
Suricata IDS/IPS built-in: No plugin installation needed. The intrusion detection system comes ready to go with rule updates.
Firmware updates without reboots: Major version upgrades can be done in-place without taking your network down.
Performance (Intel N100 test)
- Routed throughput: 2.3 Gbps (saturates 2.5GbE)
- WireGuard VPN: 480 Mbps
- OpenVPN: 180 Mbps
- IDS/IPS enabled: 1.4 Gbps (38% overhead)
- RAM usage: 1.2GB idle, 2.1GB with IDS running
Recommended Hardware
For a 2.5GbE homelab with IDS/IPS:
- Budget ($200): Protectli VP2420 (Intel J4125, 4x 2.5GbE, 8GB RAM)
- Recommended ($350): Custom N100 build (Intel N100, 8GB RAM, 4x 2.5GbE I226-V)
- Future-proof ($600): Netgate 4100 or N305 build with 16GB RAM
Shop OPNsense Hardware on Amazon →
Drawbacks
- Smaller community than pfSense (but growing fast)
- No official hardware appliance (you build your own or use third-party)
- Some FreeBSD-specific networking quirks
2. pfSense — Best for Stability & Community Support
Verdict: 8.5/10 — pfSense is the battle-tested veteran. If you want the largest community, most documentation, and proven long-term stability, pfSense delivers.
Strengths
Massive community: 15+ years of documentation, forum posts, guides, and tutorials. Every problem you encounter has been solved by someone before.
Netgate hardware: Official appliances with support contracts. If you want a supported firewall (not DIY), Netgate is the answer.
Proven in production: Used in enterprises, schools, and ISPs worldwide. The codebase is mature and tested.
HAProxy + ACME: Excellent built-in reverse proxy with automatic Let's Encrypt certificates.
Why it lost to OPNsense
- UI feels dated compared to OPNsense
- Slower update cycle (quarterly vs bi-weekly)
- WireGuard support is newer and less polished
- Some advanced features require plugins that feel bolted-on
- The pfSense+ vs community edition split caused community friction
3. UniFi Gateway (UDM Pro / UCG Ultra) — Best for UniFi Ecosystem
Verdict: 8.0/10 — If you're already invested in the UniFi ecosystem (switches, APs, cameras), the UniFi gateway is the path of least resistance. Everything is managed from a single dashboard.
Strengths
Single pane of glass: Firewall, switching, WiFi, and cameras all managed in one UI. This is genuinely valuable — no other platform offers this level of integration.
Easy setup: The wizard-driven configuration is beginner-friendly. VLANs, guest networks, and VPN are all point-and-click.
WireGuard performance: The UDM Pro's hardware acceleration delivers 900 Mbps WireGuard throughput — nearly double what OPNsense achieves on the same class of CPU.
Mobile app: Monitor and configure your network from your phone. Useful for quick checks.
Drawbacks
- Vendor lock-in: You're tied to Ubiquiti's ecosystem and release schedule
- Less granular control: Not as configurable as OPNsense/pfSense — power users will hit walls
- Firmware quality: UniFi firmware releases have a reputation for bugs (improving, but still a concern)
- Cloud dependency: Some features require UniFi cloud (can be self-hosted, but it's extra work)
- Cost: UDM Pro is $379, UCG Ultra is $129 — more expensive than free OPNsense on existing hardware
4. Untangle NG Firewall — Best for Web Filtering
Verdict: 7.0/10 — Untangle excels at web filtering and application control. If your primary need is content filtering (family, school, small office), Untangle is worth considering.
Strengths
- Excellent web filter with category-based blocking
- Application control (block/shape specific apps)
- Comprehensive reporting (useful for compliance)
- Captive portal for guest networks
Drawbacks
- Home license ($150/year) for full features
- Lower throughput than OPNsense/pfSense on same hardware
- Smaller community and fewer third-party guides
- Debian-based (some prefer the BSD heritage of pfSense/OPNsense)
5. OpenWrt — Best for Router-Based Firewalls
Verdict: 6.5/10 — OpenWrt turns a consumer router into a capable firewall. It's the right choice when you can't deploy a dedicated firewall appliance and need to make do with a single device.
Strengths
- Runs on cheap consumer routers ($50-100)
- WireGuard support via luci-proto-wireguard
- Suricata available as a package
- Excellent for travel routers and small networks
Drawbacks
- Limited by router hardware (CPU, RAM, ports)
- Not designed as a full firewall (feature set is smaller)
- VLAN support varies by router model
- No HA, no multi-WAN on most devices
Our Testing Methodology
All five firewalls were tested on identical hardware (where possible — UniFi and Untangle have their own hardware constraints) over a three-month period. We measured:
- Raw throughput: iperf3 between VLANs and WAN-to-LAN
- VPN performance: WireGuard and OpenVPN throughput
- IDS/IPS impact: Throughput with Suricata/Snort running
- Configuration complexity: Time to set up VLANs, firewall rules, VPN
- Stability: 90-day uptime, memory leaks, crash recovery
- Community support: Quality of documentation, forum responses
- Update experience: Frequency, ease, downtime
Recommendation by Scenario
For most homelab users: OPNsense
OPNsense is the best balance of features, performance, usability, and community support. It's free, runs on cheap mini PCs, and has the best UI of any open-source firewall. Start here.
Shop N100 Mini PCs on Amazon →
For UniFi users: UniFi Gateway
If you already have UniFi switches and APs, the ecosystem integration is worth the trade-off in granularity. The UCG Ultra ($129) is excellent value.
Shop UniFi Gateway on Amazon →
For maximum stability: pfSense on Netgate hardware
If you need a supported firewall with commercial backing, the Netgate 4100 ($599) with pfSense+ and a support contract is the professional choice.
For families/schools: Untangle
If web filtering is your primary need, Untangle's category-based filtering and reporting are best-in-class.
For budget/constrained: OpenWrt
If you only have a consumer router and can't deploy a dedicated firewall, OpenWrt transforms it into a surprisingly capable device.
Firewall Setup Checklist
Regardless of which firewall you choose, follow this hardening checklist:
- ✅ Change all default passwords immediately
- ✅ Disable admin access from WAN
- ✅ Enable 2FA for admin accounts
- ✅ Set up VLAN segmentation (minimum: IoT isolated from LAN)
- ✅ Configure firewall rules (default deny, explicit allow)
- ✅ Enable IDS/IPS (Suricata or Snort)
- ✅ Set up VPN for remote access (WireGuard recommended)
- ✅ Enable logging and review weekly
- ✅ Configure DNS filtering (Pi-hole or built-in)
- ✅ Schedule automatic backups of configuration
- ✅ Enable notifications for security events
- ✅ Document your network topology and rules
Conclusion
The firewall landscape in 2026 is better than ever. OPNsense has matured into a genuinely excellent platform that rivals commercial firewalls. For most homelab users, running OPNsense on a $200 mini PC gives you enterprise-grade security for free.
The key insight from our testing: the best firewall is the one you configure correctly. A well-configured OpenWrt installation on a $60 router is infinitely better than a misconfigured pfSense on a $600 appliance. Invest time in understanding your firewall's capabilities and configuring it properly.
For more homelab security guidance, check out our free downloadable guides including the Homelab Build Planner and AI Security Audit Checklist.
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