Can't access specific domain from Plusnet broadband – works on mobile data & VPN

[#1]

@Townman 

A ping would indicate if there is routing issues, sadly I've not had my request answred,

[#2]

The flipping DNS on the hub2.

Hub 2 configured with fixed DNS entries (In order to make the Hub 2 *not* act as part of DNS resolution for end devices, and to get DHCP working as it should do - IMO).

Drop the PPP link (done via the Hub2 'disconnect', with entries in the Hub2 log indicating that it has received a confirmation of the termination of a PPP session), and sometimes the Hub2 flips its primary and secondary DNS without any changes to the configuration of the Hub2

The primary becomes secondary, the secondary becomes primary. And then the primary becomes primary and the secondary becomes secondary.

I thought Plusnet had three pairs of DNS servers?

(the entries in my hosts files are...

127.0.0.1 uk-script.dotmetrics.net
127.0.0.1 www.cyberciti.biz

But these won't have any effect on the Hub2)

IMO.

[#3]

I'm lost! Didn't really get what you're trying to infer.

[#4]

Hi @Dan_the_Van - don't mean to ignore you. The PC is currently at our church officer's house. I will need to go there and do all the tests that you are asking me to, or take remote of the computer. once i have access, i will update the status here.

THANK YOU EVERYONE FOR YOUR INPUTS. REALLY APPRECIATE. But as the system is not at my home, i am unable to conduct  any tests on the fly. Once I get access, I will update here.