The DNS server isn�t responding

How can I resolve this problem to get my Win 10 PC to access internet again?
All other laptops, tablets & smartphones connect ok with BT HH6 .

Have you tried setting a DNS server manually on that PC?

In reply to a post by MrSaffron:

Have you tried setting a DNS server manually on that PC?

If you mean typing in DNS addresses rather than obtaining automatically then yes. I assumed I shouldn't reboot PC after entering addresses , is that correct?

Should be no need for a reboot,

If you do a nslookup www.thinkbroadband.com

command from the command line it will give you information on what the machine is trying to use to resolve DNS.

If you have IPv6 partly configured then try turning off IPv6 support, and get the IPv4 stuff working first.

In reply to a post by MrSaffron:

Should be no need for a reboot,

If you do a nslookup www.thinkbroadband.com

command from the command line it will give you information on what the machine is trying to use to resolve DNS.

If you have IPv6 partly configured then try turning off IPv6 support, and get the IPv4 stuff working first.

After typing nslookup in CMD I get "Default Server bathtub " and the bathtub IP address used for access.
After typing www.thinkbroadband.com I get message " Non-author active answer:
Name: www.thinkbroadband.com.cdn.cloudflare.net
Addresses: 240:cb00: etc
104.25.243.35
104.25..242.35
Aliases: www.thinkbroadband.com
>
Still nothing beyond BT HH even after turning off IPv6

Bathtub is what?

In reply to a post by MrSaffron:

Bathtub is what?

Sorry don't understand

To quote

"After typing nslookup in CMD I get "Default Server bathtub " and the bathtub IP address used for access"

I am wondering what device is called Bathtub - since it seems DNS resolution is trying to be done via that device

In reply to a post by MrSaffron:

To quote

"After typing nslookup in CMD I get "Default Server bathtub " and the bathtub IP address used for access"

I am wondering what device is called Bathtub - since it seems DNS resolution is trying to be done via that device

Sorry it was predictive text bthub became bathtub !! For bathtub read bthub

Okay so the hub is passing on DNS results to the PC, what happens if you tracert labs.thinkbroadband.com in the command line?

Also this PC are you sure it is not blocked by the BT parental controls? i.e. there is a tendency for the parental controls to want you to authorise devices to have access, rather than be fully open by default

In reply to a post by MrSaffron:

Okay so the hub is passing on DNS results to the PC, what happens if you tracert labs.thinkbroadband.com in the command line?

Also this PC are you sure it is not blocked by the BT parental controls? i.e. there is a tendency for the parental controls to want you to authorise devices to have access, rather than be fully open by default

Checked the BT HH6 & there are no access controls on any device.
When I type labs.thinkbroadband.com I get 'labs.thinkbroadband.com' is not recognised as an internal or external command,operable program or batch file.
When I type tracert labs.thinkbroadband.com I get "unable to resolve target system name labs.thinkbroadband.com".

Try the command

nslookup labs.thinkbroadband.com

In reply to a post by MrSaffron:

Try the command

nslookup labs.thinkbroadband.com

I get:-
Server: resolver1.opendns.com
Address: 208.67.222.222

Non-authorative answer:
Name: labs.thinkbroadband.com
Addresses: 2a02:68:1::13
2a02:68:1::12
80.249.99.73
80.249.106.133

Hope that�s clear. Any idea ?

This sequence of command line commands might clear things

ipconfig /flushdns
ipconfig /registerdns
ipconfig /release
ipconfig /renew
NETSH winsock reset catalog
NETSH int ipv4 reset reset.log
NETSH int ipv6 reset reset.log

From what others are saying my guess if you have just had the Windows 10 Creators update

Thanks & have run through those commands firstly with only one restart at final NETSH entry. Then a second time with restarts after each NETSH entry all without success.
All suggestions welcome. IPv6 still disabled & I have also uninstalled VirtualBox

When you say restart do you mean reboot the PC.

Those commands are intended to be run in sequence without any PC reboots in between

I entered each command when prompted to do so but after each NETSH entry a reboot was requested. First time I ignored the reboot until the last one when I did reboot. Second time I did reboot after each NETSH entry ie 3 reboots.
In neither was I able to connect.

I give up then, one of those Windows issues that means need to be sat at the machine to try a myriad of random things and ask questions in real time.

Thanks for trying , much appreciated

Bob

In reply to a post by bobrey:

Thanks for trying , much appreciated

Bob

Can you post the entire contents of

ipconfig /all

Also, please turn IPv6 back on in Windows in the network stack, it isn't really designed to be switched off.

Also, check that you don't have a proxy server specified.

Finally, try with a different web browser just to see if it is a browser-specific issue.

In reply to a post by Pipexer:

In reply to a post by bobrey:

Thanks for trying , much appreciated

Bob

Can you post the entire contents of

ipconfig /all

Also, please turn IPv6 back on in Windows in the network stack, it isn't really designed to be switched off.

Also, check that you don't have a proxy server specified.

Finally, try with a different web browser just to see if it is a browser-specific issue.

Ipv6 turned on, no proxy server & same issue with Edge,Chrome & Firefox.
Result of ipconfig/all :-

Win IP Config
Host name:Bob-PC
Primary DNS Suffix:
IP Routing Enabled:No
Wins proxy enabled: No
DNS Suffix Search List:home

Ethernet adaptor Ethernet 2

Media State: Media disconnected
Connection-specific DNS Suffix:
Description: Tap-Windows Adapter V9
Physical address: 00-FF etc etc
DHCP enabled: Yes
Autoconfig enabled: Yes

Ethernet adapter Ethernet 3:

Media State: Media disconnected
Description: Realtek PCIe GBE Family Controller
Physical address:54-04 etc etc
DHCP enabled : Yes
Autoconfig enabled: Yes
IPv4 address: 192.168.1.96 (preferred)
Subnet Mask: 255.255.255.0
Lease Obtained : Wed,Feb 21 7:28am
Lease expires: Thursday
Default Gateway: 192.168.1.254
DHCP Server: 192.168.1.255
DNS Servers 208.67.222.222
208.67.220.220
NetBIOS over Tcpip : Enabled

Ethernet adapter Ethernet:

Media State : Media disconnected
ConnectionConnection-specific DNs suffix:
Description : VPN Client Adapter - New
Physical address : 00-AC-10 etc etc
DHCP Enabled: Yes
Autoconfig Enabled: Yes

This took some copy typing so if anything unclear or any queries please let me know.
Any ideas of cause or problem?

Media State: Media disconnected

That doesn't look right. It's saying that the Ethernet cable is not connected.

Also NetBIOS over Tcpip should be disabled these days.

Most of the time when these sorts of issues arise, I normally advise to re-install the network driver as this can often reset to the default driver settings and then sort out any issues (if it's software related).

I'm guessing disconnected may have been a typo for Ethernet 3 as if it was disconnected then as it is using DHCP it shouldn't show an IP address. NetBIOS shouldn't cause the issues being seen and is probably on by default for pretty much all implementations.

OP: Have you tried setting the DNS servers to your ISPs default just to rule out any possible network issues with the ISP using OpenDNS?

PS : We seem to be having the same conversation in 2 threads. Any reason why this is split across 2 as it means the same things are being posted in 2 places for what appear to be the same potential root cause?

Edited by ian72 (Wed 21-Feb-18 11:39:29)

See other thread on same topic at

http://forums.thinkbroadband.com/multiuser/t/4583599...