Blocking sometimes work sometimes not

[Adam2]

Hi,

I have a Compal modem from UPC(white ugly box) in which it is impossible to set DNS. This option is blocked.

I have disabled DHCP in Compal for IPv4 and for IPv6
I have enabled DHCP in Pihole.
All clients are visible in Pihole DHCP list.

In Windows 10, the ipconfig /all command shows Pihole as DNS

Nevertheless, I can't block the sites. I added cnn.com to the blacklist and I could still visit the site sometimes. What is the problem?

Debug Token:

https://tricorder.pi-hole.net/r6o8uk0r/

[Bucking_Horn]

@Adam2

I have disabled DHCP in Compal for IPv4 and for IPv6

That doesn't seem to be the case:
Besides your Pi-hole, your router's DHCP server is still active in your network, distributing two public IPv4 addresses as DNS servers.

*** [ DIAGNOSING ]: Discovering active DHCP servers (takes 10 seconds)
   Scanning all your interfaces for DHCP servers
   
   * Received 548 bytes from eth0:192.168.0.1
     DHCP options:
      Message type: DHCPOFFER (2)
      server-identifier: 192.168.0.1
      router: 192.168.0.1
      dns-server: 62.179.1.61
      dns-server: 62.179.1.63
      domain-name: "home"
      --- end of options ---
    
   * Received 300 bytes from eth0:192.168.0.100
     Offered IP address: 192.168.0.238
     DHCP options:
      Message type: DHCPOFFER (2)
      server-identifier: 192.168.0.100
      dns-server: 192.168.0.100
      domain-name: "home"
      router: 192.168.0.1
      --- end of options ---

Note that DHCP is strictly IPv4.
Since your network is not configured as expected for IPv4, I suspect your router to advertise its IPv6 address as DNS server as well.

@Adam2

In Windows 10, the ipconfig /all command shows Pihole as DNS

Please share the DNS section of that output.

[Adam2]

Thank you for your reply. At some point after router reset, everything started to work. Unfortunately I don't know why but during the night the router turned on dhcp by itself.

I disabled dhcp again and it looks like everything is working for now.

Here is another log:

https://tricorder.pi-hole.net/GlYjwT8q/

Here is ipconfig:

I also don't know why I can't update gravity.

In /etc/resolv.conf I have:

domain home
nameserver 127.0.0.1

When I change adress to 192.168.0.1 (router IP) I can update gravity. But I would have to do it every time at the time of pihole reset or unplugging