Computer won’t connect to internet DNS server problem

[#1]

New to fibre plus net got everything else in the house up n running but laptop. It recognises plus net and says connected but comes up with fault with primary DNS server tried to Google all sorts or remedies but nothing sparks it into life. Any fixes known?

[#2]

That might suggest that the laptop is not getting its DNS address from the router.

Is this a simple network?

We have seen situations where a user has multiple routers, in one case there were two routers with the address 192.168.1.254 both running DHCP giving the appearance that the devices were correctly configured ... but depending on which gateway they hit, they might or might not resolve a DNS lookup.

In a DOS prompt run ipconfig /all

Check the device address and the DNS assignment.

If everything else works, then it is likely to be the laptop which has the issue.

[#3]

Thank you for your reply it’s a simple set up one router one laptop for domestic use. I’m no computer technician I tried the dos remedies from Google searches but nothing helped if it’s the laptop is it just a setting problem or hardware fault ?

[#4]

What gives rise to the suspicion that the laptop cannot connect to the DNS server ... does it connect to the internet at all?

Do not look at "remedies" just now, can you please share some diagnostics.  In a DOS prompt run the following and post back the results...

ipconfig /all

Wireless LAN adapter WiFi:

Connection-specific DNS Suffix . : home
Description . . . . . . . . . . . : Intel(R) Wi-Fi 6 AX201 160MHz
Physical Address. . . . . . . . . : *****************
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::9c2:d590:7212:1581%17(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.34(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 02 April 2023 02:31:27
Lease Expires . . . . . . . . . . : 04 April 2023 01:40:19
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 201878213
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-29-F9-81-6D-08-6A-C5-8D-B0-9E
DNS Servers . . . . . . . . . . . : A.B.C.D
NetBIOS over Tcpip. . . . . . . . : Enabled

The bits in red are the things to focus on.

[#5]

I have gone into DOS and of the areas highlighted in red the ipv4 address reads 192.168.1.34….the DNS server reads correct as does subnet mask, default gateway and dhpc server. I take it somehow I need to change the ipv4 address ?

[#6]

Sorry having a brain 💨 all correct apart from DNS servers reading is 82.163.143.171. 82.163.142.173 as opposed to the ABCD on your print out. How do I correct this

[#7]

Thank you for all your help it highlighted the setting to me I got impatient and through Google I’ve managed to change the DNS server settings and it’s all now all good connected up n running thank you once again

[#8]

The DNS setting should be 192.168.1.254.

Have you altered the DNS settings in the router?

[#9]

No I’ve not altered anything in the router just dns in computer and that has solved the problem

[#10]

I would suggest that has masked the problem.

The PC should use the DNS settings delivered by the router. Other devices might struggle if there is an issue with the standard setup.

[#11]

@simonravo 

On your PC the network connection settings should be depending where you check as below.

Windows 11 below, other versions might look different

Unless you want to use alternative DNS servers.

A PC IP address of 192.168.1.34 suggests the IP Address as been manually set or the Hub has had it's DHCP IP Address range changed from the defaults which are 192.168.1.64 to 192.168.1.253

My Hub two DNS setting from the Home Page >Status

HTH

[#12]

---

@Dan_the_Van wrote:

A PC IP address of 192.168.1.34 suggests the IP Address as been manually set or the Hub has had it's DHCP IP Address range changed from the defaults which are 192.168.1.64 to 192.168.1.253

---

That is a good spot Dan!

For reasons I cannot recall I changed my DHCP pool to .002 to .199 - as best I might recall, that could be when I swapped to the Hub Two, replacing the JLP router, which uses 192.168.1.1 as the gateway.  I would have wanted to keep the device addresses as identical as possible - especially the networked printer.

@simonravo - sorry if that caused confusion.  I had not intended for you to COPY the configuration, but rather to report the highlighted addresses.