topic Re: Hub Two DNS settings in My Router

Hub Two DNS settings

pseudonoise — Wed, 20 Mar 2024 09:42:32 GMT

Hi,

I have just replaced my old router with a new Hub 2 router. I have two Pi-holes I use for DNS.

I have set the DNS server for both primary and secondary to the IP addresses of the Pi-holes in the Hub Two IPV4 configuration page. Even after saving these value the Status page still reports

Primary DNS:

212.159.6.9

Secondary DNS:

212.159.13.49

If I then check my DNS with a service such as ipleak.net the response is my Plusnet assigned static IP address as expected.

However with no changes to the router I frequently get four BT DNS servers detected 81.134.100.161, 81.134.100.162, 81.134.100.163 and 81.134.100.164.

I have tried rebooting the router after updating (and saving) the DNS server addresses to my 192.168.0.53 and 192.168.0.112 Pi-hole addresses. (The router has an IP address of 192.168.0.1) and the issue is still there.

The router Firmware version is

v0.10.00.04201-PN

I'm really confused - anyone experienced this and has a fix ?

Many thanks,

James

Re: Hub Two DNS settings

Dan_the_Van — Wed, 20 Mar 2024 09:54:17 GMT

@pseudonoise

I believe the Hub status page reports the DNS servers which are associated with you broadband username account.

How have you tested if the pi-holes are actually acting as your DNS servers?

In the past I've tested mine with nslookup and "flurry.com" which reports

using Hub two nslookup flurry.com Server: UnKnown Address: 192.168.10.1 Non-authoritative answer: Name: flurry.com Addresses: 13.248.158.7 76.223.84.192 Using pi-hole flurry.com 192.168.10.200 Server: pi.hole Address: 192.168.10.200 Name: flurry.com Addresses: :: 0.0.0.0

HTH

Re: Hub Two DNS settings

MisterW — Wed, 20 Mar 2024 09:57:49 GMT

I have set the DNS server for both primary and secondary to the IP addresses of the Pi-holes in the Hub Two IPV4 configuration page. Even after saving these value the Status page still reports

Primary DNS:

212.159.6.9

Secondary DNS:

212.159.13.49

@pseudonoise the Status page shows the default DNS servers that have been returned by Plusnet with the PPPoE connection.

Setting the DNS servers on the Hub 2 defines which DNS servers will be supplied to DHCP clients. Normally DHCP would supply the router IP itself and then relay any DNS requests upstream using the ones from the PPPoE connection. In your case DHCP should be supplying the IP's for the PiHoles which (I presume) are configured with their own upstream servers

Re: Hub Two DNS settings

pseudonoise — Wed, 20 Mar 2024 18:52:36 GMT

Thanks Dan-The-Van,

I used nslookup as you advised and get the same result, so it appears the Pi-holes are working.

Thanks,

James

Re: Hub Two DNS settings

pseudonoise — Wed, 20 Mar 2024 18:54:52 GMT

Thanks MisterW,

That now makes sense- I was expecting the status page to reflect the changes I had made to DNS server addresses.

James