Both DNSMasq and Unbound DNS serve as DNS resolvers in OPNSense, but they have key differences. Which one is better depends on your needs, but Unbound DNS is generally the better choice for modern networks.
🆚 Comparison: DNSMasq vs. Unbound DNS
| Feature | Unbound DNS (Recommended) | DNSMasq |
|---|---|---|
| Function | Full recursive DNS resolver & caching server | Lightweight DNS forwarder & DHCP server |
| Performance | Faster because it resolves queries directly from the root DNS servers | Relies on upstream resolvers (e.g., Google DNS, Cloudflare) |
| Local DNS Overrides | ✅ Strong control over local domain resolution | ✅ Supports local overrides, but can sometimes be bypassed |
| Security & Privacy | ✅ Supports DNS over TLS (DoT) and DNSSEC | ❌ No built-in DoT or DNSSEC support |
| Customization & Features | ✅ Advanced caching, blocklists, logs | Limited features compared to Unbound |
| Best Use Case | Enterprise, security-conscious, and performance-focused environments | Simple networks, guest Wi-Fi, lightweight deployments |
🛠 When to Use Unbound DNS? (Recommended)
✅ If you need strong security and privacy
- Supports DNSSEC (prevents DNS spoofing)
- Can encrypt queries via DNS-over-TLS (DoT)
✅ If you want full control over local DNS resolution
- Ensures that local overrides always take priority
- Doesn’t forward local queries unless explicitly configured
✅ If you want a faster DNS resolver
- Directly queries the root DNS servers instead of relying on third-party resolvers
- Better caching mechanism improves performance
✅ If you need logging & debugging tools
- Detailed logs help debug DNS resolution issues
- Can create custom DNS filtering rules
🛠 Best Unbound DNS Settings for OPNSense
- Disable Forwarding Mode (so it works as a full DNS resolver)
- Enable Local Overrides for internal domains
- Use Static Local Zone Type to prioritize internal DNS
- Enable DNSSEC for better security
- Use TLS with Cloudflare/Quad9 for encrypted DNS queries
🛠 When to Use DNSMasq?
✅ If you have a small or low-power network
- Uses less memory than Unbound
- Simple DHCP + DNS forwarding for small LANs
✅ If you need lightweight DNS forwarding
- Good for guest Wi-Fi or IoT networks
- Can act as a DHCP server for basic setups
✅ If you want to use external DNS (e.g., Google, Cloudflare)
- If you prefer always forwarding DNS queries to an external service, DNSMasq can be simpler than Unbound.
🚀 Conclusion: Which One Should You Use?
| For Most Users (Security, Speed, Privacy) | Unbound DNS ✅ (Recommended) |
|---|---|
| For Small, Simple Networks (Lightweight, Fast Setup) | DNSMasq |
💡 My Recommendation
Use Unbound DNS unless you have a specific reason to use DNSMasq. Unbound provides better security, privacy, performance, and local DNS handling.
Let me know if you need help setting it up! 🚀