DNS filtering
A method of blocking harmful websites by changing the Domain Name System settings on your router. It protects all devices on your network without installing software on each one.
In plain English
A method of blocking harmful websites by changing the Domain Name System settings on your router. It protects all devices on your network without installing software on each one.
Why it matters
DNS filtering is one of the easiest household controls to set up and covers visitors as well as family devices. It does not work on mobile data or some VPNs, so combining it with device-level controls is sensible.
This is practical educational content to support families. For case-specific concerns about a child's safety, contact the NSPCC helpline on 0808 800 5000 or your local safeguarding team.
Last reviewed: 2026-05-17