Using Custom DNS Slow Speeds

FAM0422UK — Wed, 17 Dec 2025 17:08:44 GMT

Hey All

i currently have a Hub Pro WiFi 7 I have ser to use cloud fare family dns as ee parental control seems to blocking site that don’t need fall into the block category a invoice processing app Joist.

But I have notice the speed to the hub is still the same but to devices there is a dramatic drop when I return back to EE I have constant speeds.

is this a bug?

Re: Using Custom DNS Slow Speeds

bobpullen — Thu, 18 Dec 2025 10:14:43 GMT

Seems odd that your choice of DNS would impact throughput speeds to your devices, although I don't claim to know exactly what Cloudflare's Family DNS is doing. In addition to this, the custom DNS feature assigns the server addresses directly to your devices over DHCP so the hub isn't being asked to do anything with DNS at all 🤔

What happens if you configure custom DNS but using a different third party resolver e.g. Google - 8.8.8.8? If that doesn't result in the same problem, then I'd be pointing the finger at Cloudflare.

On the EE parental controls observation, have you considered trying to whitelist the addresses/domains required by the invoicing app?

topic Using Custom DNS Slow Speeds in Broadband & Landline

Using Custom DNS Slow Speeds

Re: Using Custom DNS Slow Speeds