topic Re: Is there a problem with the DNS server ? in Broadband

Is there a problem with the DNS server ?

tm4 — Wed, 26 Jul 2023 09:28:19 GMT

For the last couple of days all computers on my (small) network have been experiencing delays in domain name resolutions..

Sometime the waiting can run into minutes making usage painful..

As this can be experienced by any user on my network and is relatively new I believe something may have changed with the router's DNS servers.

My router currently shows -

Primary DNS: 212.159.13.52
Secondary DNS:212.159.13.51

(I have carried out speed tests and they seem reasonable - 66.9 down , 6.3 up)

Any assistance on this would be greatly appreciated.

Re: Is there a problem with the DNS server ?

RPMozley — Wed, 26 Jul 2023 17:15:49 GMT

If you can set those primary and secondary DNS servers on your devices, does resolution speed improve?

Re: Is there a problem with the DNS server ?

Anonymous — Wed, 26 Jul 2023 18:49:45 GMT

@tm4 wrote:

... ... I believe something may have changed with the router's DNS servers.

My router currently shows -

Primary DNS: 212.159.13.52
Secondary DNS:212.159.13.51

This is what changed -

https://community.plus.net/t5/Tech-Help-Software-Hardware-etc/Has-Plusnet-server-212-159-6-9-just-gone-down/m-p/1929157#M94674

and

https://community.plus.net/t5/Tech-Help-Software-Hardware-etc/Has-Plusnet-server-212-159-6-9-just-gone-down/m-p/1929194#M94675

Re: Is there a problem with the DNS server ?

Dan_the_Van — Wed, 26 Jul 2023 18:48:34 GMT

@tm4

My router is set to use those DNS servers and I have NOT noticed any issues, the first step would be to reboot your Hub.

If you have a Hub Two it is possible to set your preferred DNS servers.

http://192.168.1.254 Home >Advanced Settings >My Network >IP4v configuration >DNS Servers

Make 'Auto' No and add your chosen DNS servers

HTH

@Anonymous bit quick to jump to a conclusion on one report of a DNS issue

Re: Is there a problem with the DNS server ?

tm4 — Thu, 27 Jul 2023 09:45:49 GMT

Thanks for the advice. I have tried resetting one PC primary and secondary DNS servers and there has been no noticeable difference. I guess this might mean I need to look in another direction ?

Re: Is there a problem with the DNS server ?

tm4 — Thu, 27 Jul 2023 09:48:09 GMT

Thanks for the advice. A server reboot has not improved the situation so I will try to change the DNS servers on the router - I did not know this was an option.

Re: Is there a problem with the DNS server ?

bobpullen — Thu, 27 Jul 2023 12:07:25 GMT

When it happens, are you able to carry out a lookup from a Windows command line?

The results from the commands below might be telling: -

> nslookup bbc.co.uk > nslookup bbc.co.uk 212.159.13.52 > nslookup bbc.co.uk 192.168.1.254 > ping 192.168.1.254

Re: Is there a problem with the DNS server ?

tm4 — Thu, 27 Jul 2023 13:08:12 GMT

I received the following results from nslookup hl.co.uk -

C:\WINDOWS\system32>nslookup hl.co.uk

Server: UnKnown

Address: 192.168.1.254

Non-authoritative answer:

Name: hl.co.uk

Address: 81.145.150.131

Does this throw any light on anything ?

Re: Is there a problem with the DNS server ?

bobpullen — Thu, 27 Jul 2023 13:12:38 GMT

If the output was returned quickly, then no it doesn't. It suggests that the machine you ran it from is using the hub for DNS lookups, and it's returning the expected DNS response.