Cisco-powered DNS filtering for home networks
Quick answer
OpenDNS FamilyShield is a free DNS filter by Cisco that blocks adult content across your entire home network. It is effective for home Wi-Fi but offers no mobile app, no tamper lock, and no per-device control.
What OpenDNS FamilyShield does well
- Backed by Cisco's massive threat intelligence and domain database.
- Free — no account, no subscription required.
- Blocks adult content, phishing, and malware at the DNS level.
- Easy setup: change two DNS addresses on your router and the whole network is covered.
Where OpenDNS FamilyShield leaves gaps
- No mobile or desktop app — requires manual DNS configuration.
- No uninstall or DNS-change protection — the filter can be cleared.
- No per-device profiles — one filter level for the entire network.
- No Safe Search enforcement.
- No ad or tracker blocking.
- Limited to home networks — does not follow the device outside the Wi-Fi.
Feature-by-feature comparison
| Feature | Kahf Guard | OpenDNS FamilyShield |
|---|---|---|
| DNS-level blocking | ✓ | ✓ |
| App-level filtering | ✓ | ✗ |
| Uninstall protection | ✓ | ✗ |
| DNS-change lock | ✓ | ✗ |
| Safe search enforcement | ✓ | ✗ |
| Ad & tracker blocking | ✓ | ✗ |
| Per-device profiles | ✓ | ✗ |
| Router / whole-home coverage | ✓ | ✓ |
| Free tier | ✓ | ✓ |
Our verdict
OpenDNS FamilyShield is a free, reliable home-network filter backed by Cisco. It works well for a household router setup, but it does not protect devices outside the home Wi-Fi and offers no tamper resistance. A child who changes the DNS setting on their phone bypasses it instantly.
Block it at the source — and lock it
Free DNS-level filtering, app-level protection, and tamper lock in one app.
Get Kahf Guard freeFrequently asked questions
Is OpenDNS FamilyShield free?
Yes, completely free. There is no paid family tier.
Does FamilyShield work on mobile?
It works on mobile at the DNS level, but you must manually configure the DNS settings on each device. There is no app.
Can FamilyShield be bypassed?
Yes. Changing the DNS setting on a device bypasses the filter. There is no lock to prevent this.