@XRaySpeX - you're comparing Apples with Oranges.
@XRaySpeX wrote:
My f/ware today updated to version r3.8.11-R-1414606-PROD-83002 & the ability to not have AUTO DNS Servers but to config your own appeared under Advanced Settings > My Network. So I set them to OpenDNS (208.67.222.222 & 208.67.220.220).
Doing this is asking the hub to assign custom DNS server addresses as part of its DHCP offer i.e. when the hub issues a LAN IP to clients, it also issues the DNS addresses you have specified. If you were to run something like ipconfig from a connected Windows machine then you would see that the network interface has the custom DNS assigned. This means your connected devices are going 'straight to the source' for DNS requests, rather than proxying/forwarding them through the hub.
@XRaySpeX wrote:
However the page Advanced > BB > Internet still shows the BT servers:
Broadband primary DNS: 81.139.56.100
Broadband secondary DNS: 81.139.57.100
These are the DNS addresses assigned to the PPPoE/WAN interface of the router. They are assigned by the RADIUS equipment out on the Broadband network. Any DNS requests your hub makes is using these resolvers.
@XRaySpeX wrote:
So which set of DNS is the router using?
The router is using the BT/EE DNS; Your connected devices are using your custom DNS.
Assigning custom DNS via DHCP is probably the preferred method (rather than changing the hub's DNS) as it's removing a hop/point of failure from the mix.
