Can't set DNS

[Koustav Guha]

My cable broadband has static IP. If I put 8.8.8.8 or 208.67.222.222 in ethernet DNS field then nslookup & ipconfig/all says these are my DNS, but "http://whoismydns.com/" says I'm using Level3 DNS. https://welcome.opendns.com/ also says I'm not using their DNS, what's the matter? Can anyone help me? Plus Chrome connectivity diagnostic says DNS lookup taking excessive time.

[limegorilla]

1 minute ago, Koustav Guha said:

My cable broadband has static IP. If I put 8.8.8.8 or 208.67.222.222 in ethernet DNS field then nslookup & ipconfig/all says these are my DNS, but "http://whoismydns.com/" says I'm using Level3 DNS. https://welcome.opendns.com/ also says I'm not using their DNS, what's the matter? Can anyone help me? Plus Chrome connectivity diagnostic says DNS lookup taking excessive time.

Have you tried flushing it?

Open CMD, type

ipconfig /flushdns

then press enter

[Koustav Guha]

6 minutes ago, limegorilla said:

Have you tried flushing it?

Open CMD, type

ipconfig /flushdns

then press enter

I did that a lot of times?

[Leonard]

54 minutes ago, Koustav Guha said:

My cable broadband has static IP. If I put 8.8.8.8 or 208.67.222.222 in ethernet DNS field then nslookup & ipconfig/all says these are my DNS, but "http://whoismydns.com/" says I'm using Level3 DNS. https://welcome.opendns.com/ also says I'm not using their DNS, what's the matter? Can anyone help me? Plus Chrome connectivity diagnostic says DNS lookup taking excessive time.

Firstly, is your internet IPv6 or IPv4 because if it is IPv6 and you are trying to set IPv4 then IPv6 will obviously be the primary DNS. Secondly, are you setting the DNS in the IPv4 properties and then hitting Use the following DNS server then OK?...if so then do it again and then open an administrator's cmd and type ipconfig /all and look for the DNS that you entered if it is not there then your PC may be hacked. Thirdly, are you connected to a router before your ISP's modem?

[Windows7ge]

Did you manually set the DNS on your computer or your router? Changing the DNS on the router should force every client to use the DNS that you want. Then just restart your computer and when your computer makes a DHCP request it'll receive the DNS that you want to use.

 

If it still doesn't use the one you want then something is wrong with your computer.

[Koustav Guha]

On 9/26/2017 at 11:29 PM, Windows7ge said:

Did you manually set the DNS on your computer or your router? Changing the DNS on the router should force every client to use the DNS that you want. Then just restart your computer and when your computer makes a DHCP request it'll receive the DNS that you want to use.

 

If it still doesn't use the one you want then something is wrong with your computer.

Changed in both cases. In Router first changed WAN DNS, then DHCP server DNS but nothing works

[Windows7ge]

7 hours ago, Koustav Guha said:

Changed in both cases. In Router first changed WAN DNS, then DHCP server DNS but nothing works

Did you try testing your DNS from a different computer? If the result is the same then the issue is either your router or your ISP isn't allowing you to use the DNS server of your choice. Theoretically as your connection goes through your ISP they could snip off any alternate DNS that you're using and replace it with their own. It could be a security reason to prevent DNS spoofing or they may expect an extra fee to be paid if you don't want to use theirs. This is a bit of a stretch though as its the only other idea I have to explain your problem.

 

Beyond this you will have to contact your ISP and see if they have any answers.