DNS filtering vs VPN: what each one actually does

What DNS filtering does

Every site and app your devices contact starts with a DNS lookup. A filtering DNS checks that destination against blocklists first and refuses to resolve the bad ones: phishing sites, malware hosts, ad networks, trackers. It is lightweight, always on, and works on devices where you cannot install software (TVs, IoT, guests). It does not hide your IP address or encrypt your traffic beyond the DNS query itself.

What a VPN does

A VPN encrypts all your traffic and routes it through the VPN server, hiding your IP from sites and hiding your browsing from your ISP or the local network. It does not judge whether a destination is safe; it will happily carry you to a phishing site over an encrypted tunnel. Most VPNs include some ad blocking now, but it is a side feature, not the core.

When you want each

• Blocking scams aimed at your family: DNS filtering. It stops the dangerous destination before anything loads.
• Privacy on public Wi-Fi: VPN. It protects the connection itself.
• Parental controls across the house: DNS filtering, especially at the router.
• Accessing region-locked content: VPN. DNS filtering does not change your apparent location.

Can you use both?

Yes, and they complement each other: the VPN protects the pipe, the filter judges the destinations. One caution: some VPN apps override your DNS settings, which silently disables your filtering. If you run both, check that your VPN is configured to keep your custom DNS.

← All articles