KNOWLEDGE
Internet Shield: Why your router is the first line of defence
Your family WiFi is an open door. An internet shield on the router protects all devices simultaneously — no app, no surveillance. What it is and which provider is right for you.
Your family WiFi is currently an open door. Every device — from the children's tablet to the Smart TV — can access every website in the world. Including the ones no child should ever see. A DNS filter changes that. No app download, no surveillance software, no IT degree needed. One setting on your router, and all devices on the network are protected.
What is a DNS filter — and how does it work?
DNS stands for "Domain Name System" — think of it as the phone book of the internet. Every time someone visits a website, your device asks a DNS server: "Where do I find this site?" A DNS filter checks this request and blocks harmful sites BEFORE they load.
What gets blocked — and what doesn't
What gets blocked: Pornography, violent content, malware, phishing, gambling — depending on the settings.
What does NOT happen: Your children are not monitored. No screenshots are taken, no chats are read, no activities are logged. The filter simply removes the worst entries from the "phone book" before your child opens it.
💡 Tip:
Think of it like a bouncer at the entrance. Most guests are let in, but certain ones — those on a list — don't get through.
Which DNS provider is right for you?
Several providers offer family-friendly DNS filters for free or at low cost:
- AdGuard DNS — Free, simple, blocks ads + harmful sites
- NextDNS — Free up to 300,000 requests/month, highly configurable
- CleanBrowsing — Specifically designed for families, free in the basic version
- AdGuard Home — Self-hosted, maximum control (for advanced users)
Our recommendation for beginners: AdGuard DNS — blocks ads, trackers, and harmful content. Important note: AdGuard has different profiles with very different levels of protection. Which profile suits your family, how to enter it correctly, and how to verify the filter is actually active — that's all covered in the NUNIVIA Internet Shield guide. For maximum control over all devices: AdGuard Home (self-hosted).
⚠️ Note:
All these providers store no personal data and operate in compliance with GDPR. Your internet provider, on the other hand, can see EVERYTHING you access by default.
What's next?
You now know why a DNS-based internet shield is the safest first step. The concrete setup — which DNS addresses you need, how to enter them in Fritz!Box, Speedport, or TP-Link, and how to configure protection profiles by age — is explained step by step in the NUNIVIA Internet Shield guide.
And for those who want maximum control: with a local filter directly in your home network (AdGuard Home), you block ads and harmful content for all devices simultaneously — including Smart TV, games consoles, and guest WiFi. The NUNIVIA Home Guide shows you how.
DNS protection is Layer 1 — what comes after?
AdGuard Home provides solid protection against known threats. But DNS filters have limits: new phishing domains, direct IP connections, and compromised legitimate sites get through. What you can do about it — and how robust you can really make your network — is explained in our article Why DNS protection isn't everything.
A DNS filter is the technical foundation. But it's not the whole solution. NUNIVIA combines technical protection with tools for family conversations, reflection, and shared growth. Because lasting change comes from within — not just from the router.
Your Internet Shield: Set up in 15 minutes.
Which settings you need, how to configure them on Fritz!Box, Speedport and other routers, and how to set up protection profiles by age — step by step, no jargon.
Get Internet ShieldMore visibility over your home network?
A local filter in your home network protects all devices at once — smart TVs, consoles, and guest Wi-Fi included.
View NUNIVIA Home Guide