DNS server.

Hi,

I tried to change the DNS server earlier on the Talk Talk hub using google DNS (pic 1) i saved the setting and when i rebooted the router i went back into the router settings to check if it worked i found the value had not changed under the "Device info" tab (pic 2) but the Google DNS was still listed as the DNS server when i clicked the DNS tab.

Could someone tell me what i am doing wrong, thanks.

Pic 1 - https://i.postimg.cc/Z5VTjzVj/dns.jpg

Pic 2 - https://i.postimg.cc/L6z4Y0w4/dns3.jpg

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What DNS servers are your DHCP connected clients receiving?

Is there an option to download the config file? It possibly has that 79 stuff in that, and the GUI change is not used to overwrite it.

Basically locking it down unless you edit the config file and "restore" it. Which I don't really recommend even if it lets you. Unless you have a spare router that works on the line.

Thanks for answering i got it sorted on Kitz forum -

Pic 2 is showing what TalkTalk hands to the "hub", along with the public IPv4 address, when establishing the connection. You Pic 1 shows what the "hub" will actually use.

From a command prompt ipconfig /all should show DNS in use by the network card. This is for PC, but I think Linux is the same.

Sorted -
DNS Servers . . . . . . . . . . . : 8.8.8.8
8.8.4.4
NetBIOS over Tcpip. . . . . . . . : Enabled

In reply to a post by pluralist:

Is there an option to download the config file? It possibly has that 79 stuff in that, and the GUI change is not used to overwrite it.

Assuming the router has a fundamental bug in its software is not necessarily the place to start diagnostics. In fact the router is working in the same way as pretty much all others. As the OP found on Kitz.

So no problem in reality. Just a “user perception” issue as clients are being issued the correct / nominated DNS severs via DHCP.

In reply to a post by Pheasant:

So no problem in reality. Just a “user perception” issue as clients are being issued the correct / nominated DNS severs via DHCP.

Yes, just a mismatched expectation of what the web UI should show.

Most people aren't aware typically most home routers act as DNS proxy and forward to the ISP DNS, and by changing the local DHCP settings the clients just bypass the router proxy / cache.

In reply to a post by Pheasant:

So no problem in reality. Just a “user perception” issue as clients are being issued the correct / nominated DNS severs via DHCP.

You nailed it, i thought it would show the same DNS under both tabs but as has been explained that's not how it works.

Ta!

If you want to verify what DNS servers are actually being called you can use a site like https://ipleak.net/