Pi-hole DNS server is not working

[Mustafa_Khurram]

sudo grep -v '#\|^$' /etc/dhcpcd.conf

grep: /etc/dhcpcd.conf: No such file or directory

cat /etc/resolv.conf

> # This file is managed by man:systemd-resolved(8). Do not edit.
> #
> # This is a dynamic resolv.conf file for connecting local clients to the
> # internal DNS stub resolver of systemd-resolved. This file lists all
> # configured search domains.
> #
> # Run "resolvectl status" to see details about the uplink DNS servers
> # currently in use.
> #
> # Third party programs must not access this file directly, but only through the
> # symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
> # replace this symlink by a static file or a different symlink.
> #
> # See man:systemd-resolved.service(8) for details about the supported modes of
> # operation for /etc/resolv.conf.
> 
> nameserver 127.0.0.53
> options edns0
> search home

[deHakkelaar]

resolvectl status

?

[Mustafa_Khurram]

resolvectl status

Global
       LLMNR setting: no                  
MulticastDNS setting: no                  
  DNSOverTLS setting: no                  
      DNSSEC setting: no                  
    DNSSEC supported: no                  
          DNSSEC NTA: 10.in-addr.arpa     
                      16.172.in-addr.arpa 
                      168.192.in-addr.arpa
                      17.172.in-addr.arpa 
                      18.172.in-addr.arpa 
                      19.172.in-addr.arpa 
                      20.172.in-addr.arpa 
                      21.172.in-addr.arpa 
                      22.172.in-addr.arpa 
                      23.172.in-addr.arpa 
                      24.172.in-addr.arpa 
                      25.172.in-addr.arpa 
                      26.172.in-addr.arpa 
                      27.172.in-addr.arpa 
                      28.172.in-addr.arpa 
                      29.172.in-addr.arpa 
                      30.172.in-addr.arpa 
lines 1-23...skipping...
Global
       LLMNR setting: no                  
MulticastDNS setting: no                  
  DNSOverTLS setting: no                  
      DNSSEC setting: no                  
    DNSSEC supported: no                  
          DNSSEC NTA: 10.in-addr.arpa     
                      16.172.in-addr.arpa 
                      168.192.in-addr.arpa
                      17.172.in-addr.arpa 
                      18.172.in-addr.arpa 
                      19.172.in-addr.arpa 
                      20.172.in-addr.arpa 
                      21.172.in-addr.arpa 
                      22.172.in-addr.arpa 
                      23.172.in-addr.arpa 
                      24.172.in-addr.arpa 
                      25.172.in-addr.arpa 
                      26.172.in-addr.arpa 
                      27.172.in-addr.arpa 
                      28.172.in-addr.arpa 
                      29.172.in-addr.arpa 
                      30.172.in-addr.arpa 
                      31.172.in-addr.arpa 
                      corp                
                      d.f.ip6.arpa        
                      home                
                      internal            
                      intranet            
                      lan                 
                      local               
                      private             
                      test                

Link 3 (wlp5s0)
      Current Scopes: none
DefaultRoute setting: no  
       LLMNR setting: yes 
MulticastDNS setting: no  
  DNSOverTLS setting: no  
      DNSSEC setting: no  
    DNSSEC supported: no  

Link 2 (enp0s31f6)
      Current Scopes: DNS        
DefaultRoute setting: yes        
       LLMNR setting: yes        
MulticastDNS setting: no         
  DNSOverTLS setting: no         
      DNSSEC setting: no         
    DNSSEC supported: no         
  Current DNS Server: 192.168.1.1
         DNS Servers: 192.168.1.1
          DNS Domain: ~.         
                      home       
~
~
~

[deHakkelaar]

@Mustafa_Khurram

Current DNS Server: 192.168.1.1
             DNS Servers: 192.168.1.1

nslookup pi.hole 192.168.1.1

?

[Mustafa_Khurram]

nslookup pi.hole 192.168.1.1
Server: 192.168.1.1
Address: 192.168.1.1#53

** server can't find pi.hole: REFUSED

[deHakkelaar]

Thats different from what you initially posted:

@Mustafa_Khurram

nslookup pi.hole

;; connection timed out; no servers could be reached

Is above the full output ? No "Server" mentioned ?
Has DNS severs changed in meantime ?

[jfb]

Your DNS path through the router doesn't appear to lead to Pi-Hole. When you went straight to Pi-hole the router was out of the loop and it worked.

[deHakkelaar]

Yeah and above.
The lookup should return the IP of Pi-hole for proper blocking to work:

dehakkelaar@laptop:~$ nslookup pi.hole
Server:         10.0.0.2
Address:        10.0.0.2#53

Name:   pi.hole
Address: 10.0.0.2

[Mustafa_Khurram]

nslookup pi.hole 192.168.1.249

Connects to Pi-Hole

nslookup pi.hole

Times out

nslookup pi.hole 192.168.1.1

Server cant find Pi-Hole

Your DNS path through the router doesn't appear to lead to Pi-Hole. When you went straight to Pi-hole the router was out of the loop and it worked.

That's weird because I only changed the DNS in my router setting and not for any of my devices individually.

[deHakkelaar]

Can you post screenshots of all your router DNS and DHCP settings ?
Can paste directly into discourse here.
Try configure the router properly by handing out the Pi-hole IP as a single DNS server to the clients through the DHCP process:

https://docs.pi-hole.net/main/post-install/

If you dont have those options in your router, you could also let Pi-hole do DHCP for your network intead of your router:

How do I use Pi-hole's built in DHCP server (and why would I want to)?

Using Your Existing Router For Network-wide Ad Blocking You might not need to use Pi-hole's DHCP server: In many home environments, your router also functions as your DHCP server. In this case, you can often set Pi-hole to be the DNS server for your network clients in the router's DHCP (or LAN) settings page, which allows all of your network clients to block ads simply by connecting to the network. Setting it up this way is also what makes Pi-hole very powerful for network-wide ad blocking. W…

[deHakkelaar]

Is that all there is ? No LAN DHCP settings etc ?
Screenshots posted are for the WAN (Internet) side of the router and not the LAN side where Pi-hole and the clients are connected.

EDIT: ow you might want to redact your "Wan IPv6 Address" from screenshot above.

[jfb]

Turn off IPv6 and restart/renew and see if situation improves.

[deHakkelaar]

Above and disconnect/reconnect network for that Linux test client to have effect.
And dont configure your router to be an upstream DNS server for Pi-hole or you'll be creating a DNS loop!
You'll be missing out on individual client stats on the web GUI with this setup but for that, you'd really need a router with more options.

[Mustafa_Khurram]

Turn off IPv6 and restart/renew and see if situation improves.

It didn't change anything.

Is there anything here that I can change?

[jfb]

@Mustafa_Khurram

Is there anything here that I can change?

Set the DHCP to Pi-hole, and disable DHCP on the router.

How do I use Pi-hole's built in DHCP server (and why would I want to)?

Using Your Existing Router For Network-wide Ad Blocking You might not need to use Pi-hole's DHCP server: In many home environments, your router also functions as your DHCP server. In this case, you can often set Pi-hole to be the DNS server for your network clients in the router's DHCP (or LAN) settings page, which allows all of your network clients to block ads simply by connecting to the network. Setting it up this way is also what makes Pi-hole very powerful for network-wide ad blocking. W…

[Mustafa_Khurram]

I flipped DHCP to disabled on my router and clicked enable on Pi-Hole, but still no luck

[deHakkelaar]

Try renew DHCP lease on the Linux client:

sudo dhclient -r; sudo dhclient -v

[jfb]

@Mustafa_Khurram

I flipped DHCP to disabled on my router and clicked enable on Pi-Hole, but still no luck

Restart the router and renew the DHCP lease on all connected clients.

[Mustafa_Khurram]

I accidentally unplugged the ethernet cable from the raspberry pi, when I plugged it back in everything started to work fine. Thank you guys for all the help! I really appreciate it !