Home Network Community > Wi-Fi Routers > Router won't allow local IP in primary DNS field
< Wi-Fi Routers

Router won't allow local IP in primary DNS field

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
12

Router won't allow local IP in primary DNS field

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Router won't allow local IP in primary DNS field
Router won't allow local IP in primary DNS field
2023-12-15 15:10:11 - last edited 2024-05-05 17:03:42
Tags: #Firmware Update #Feature Request
Model: Archer A8  
Hardware Version: V1
Firmware Version: 1.13.2 Build 230824 Rel.74702n(5553)

Since updating the firmware version, the router won't let me update the Primary DNS server in "Network -> Internet" page. 

I get the following error "Invalid Primary DNS Server. Please enter another one." 

I am trying to use pihole server as the local DNS server.

 

 

aa119db8a8fe41a0b8e652a9c7ed6aee

 

276312b8f8d7455dba29c2e4edc6b102

 

  1      
 
  1      
 
#1
Options
1 Accepted Solution
Re:Router won't allow local IP in primary DNS field-Solution
2024-05-05 17:03:30 - last edited 2024-05-05 17:03:42

  @Kahakqnj I disabled the DHCP server on the router and using the one on pihole in raspberrypi.
 

Recommended Solution
  1  
  1  
#10
Options
12 Reply
Re:Router won't allow local IP in primary DNS field
2023-12-15 19:26:21
Have you tried putting in something other than 0.0.0.0 in the secondary dns field?
  0  
  0  
#2
Options
Re:Router won't allow local IP in primary DNS field
2023-12-15 19:45:14

  @eousphoros I tried blank as well. The problem is always that primary DNS field is not valid. 

It works fine if I put 8.8.8.8 in the primary field. Seems to not like local IPs.

  0  
  0  
#3
Options
Re:Router won't allow local IP in primary DNS field
2023-12-16 17:32:18

This obviously looks like a bug introduced in the new firmware update. Can someone acknowledge or add to your bug fixes?

Meanwhile, which version can I safely go back to for this router?

  0  
  0  
#4
Options
Re:Router won't allow local IP in primary DNS field
2023-12-18 19:21:29
What subnet mask are you using for your local lan? Is 192.168.0.99 a valid ip address within that mask? Have you tried assigning a lower ip address like 192.168.0.2? Don't have your specific device but do specify four local dns resolvers (2 ipv4 and 2 ipv6, 192.168.0.2 and .3 and c0de:d00d and dead:beef) successfully through the ui on my device. It's too bad the error message isn't more specific in what exactly is invalid about that address. Oh there isn't some funky unicode thing going on here is there? Using plain ascii for that input?
  0  
  0  
#5
Options
Re:Router won't allow local IP in primary DNS field
2023-12-19 01:16:57 - last edited 2023-12-19 01:17:13

  @eousphoros 

You can see the subnet mask in the "Internet" page on first post

LAN settings:
 

IP Address: 192.168.0.1

 

Subnet Mask: 255.255.255.0

I have tried different numbers from 192.168.0.1 through 101, they all throw the error alert.

This used to work in the previous firmware version, I made the mistake of upgrading it and now have this problem. 

 

 

  0  
  0  
#6
Options
Re:Router won't allow local IP in primary DNS field
2023-12-20 09:30:19

  @knotmine Last thought I have, is your primary dns ip address allocated through the dynamic ip pool / reserved ip or is it statically configured?

  0  
  0  
#7
Options
Re:Router won't allow local IP in primary DNS field
2023-12-21 14:29:40 - last edited 2023-12-22 00:37:38

  @eousphoros It's a reserved IP.  (I changed it back to 192.168.0.100, so it looks different from original screenshot)


Still, only reaches out to local DNS intermittently. 
 

LAN

 

  0  
  0  
#8
Options
Re:Router won't allow local IP in primary DNS field
2024-05-05 01:55:00

  @knotmine did you find a solution to this? Having the same issue on Archer A8.

  0  
  0  
#9
Options
Re:Router won't allow local IP in primary DNS field-Solution
2024-05-05 17:03:30 - last edited 2024-05-05 17:03:42

  @Kahakqnj I disabled the DHCP server on the router and using the one on pihole in raspberrypi.
 

Recommended Solution
  1  
  1  
#10
Options
Re:Router won't allow local IP in primary DNS field
2024-05-06 00:21:20

  @Kahakqnj 

 

This message usually appears if you try to put a private IP address for a DNS server in router Internet settings.

When using Pi hole it's IP address should be set in the DHCP settings as a primary DNS, as posted in post #8.

If this was helpful click once on the arrow pointing upward. If this solves your issue, click once the star to mark it as a "Recommended Solution".
  1  
  1  
#11
Options
12

Information

Helpful: 1

Views: 2016

Replies: 12

Tags

Firmware Update Feature Request
Related Articles
 Local device IP addresses not resolving through router DNS
3664 0
 AX73: Router changes IP if I set the dns to local resolver
1118 1
 Allow Pasting MAC and IP addresses in config setup!
300 2
Local DNS on the Archer AX50 v1.0
1372 0
 Local DNS Entry?
2077 0
 Stop redirecting local IP to tplinkwifi.net
934 7
About Us
Press
Copyright © TP-Link Systems Inc. All rights reserved.