Pi-hole doesn't log since Huawei Modem is in use

[amilopowers]

I changed from copper-cable-internet to 5G at home. The change was at September 9.
After installing my Huawei 5g CPE Pro 2 I got from my ISP (Sunrise) I set DNS to my Raspberry Pi running Pi Hole.
I now face that a lot of DNS-Queries don't go over the Raspby...

I wasn't at home September 11 to 17 so I unplugged everything. But still if you compare before September 9 (Sagemcom copper modem) to after September 17 (5G Huawei) there is a big difference. We use the same devices with the same settings as before.

Raspberry Pi 3 with DietPi and Pi-hole. Everything up to date.

Any clues why this is happening?

[jfb]

@amilopowers

Any clues why this is happening?

The router does not appear to be sending the Pi-hole DNS to clients.

Please upload a debug log and post just the token that is generated after the log is uploaded by running the following command from the Pi-hole host terminal:

pihole -d

or do it through the Web interface:

Tools > Generate Debug Log

[amilopowers]

Hello jfb

Thanks, I generated it: https://tricorder.pi-hole.net/zNnQcrLC/

[jfb]

Your DHCP server is providing two IP's for DNS, neither of which is your Pi-hole.

*** [ DIAGNOSING ]: Discovering active DHCP servers (takes 10 seconds)
   Scanning all your interfaces for DHCP servers
   Timeout: 10 seconds
   
   * Received 424 bytes from eth0:192.168.8.1
     Offered IP address: 192.168.8.115
     Server IP address: N/A
     Relay-agent IP address: N/A
     BOOTP server: (empty)
     BOOTP file: (empty)
     DHCP options:
      Message type: DHCPOFFER (2)
      server-identifier: 192.168.8.1
      lease-time: 86400 ( 1d )
      renewal-time: 43200 ( 12h )
      rebinding-time: 75600 ( 21h )
      netmask: 255.255.255.0
      router: 192.168.8.1
      dns-server: 192.168.8.115
      dns-server: 1.1.1.1
         --- end of options ---
    
   DHCP packets received on interface lo: 0
   DHCP packets received on interface eth0: 1

    PIHOLE_INTERFACE=eth0
    IPV4_ADDRESS=192.168.1.65/24

Pi-hole should be the ONLY DNS offered by the router. Fix this in the router and renew the DHCP lease on all clients.

If the router insists on multiple DNS entries, try entering the Pi-hole IP twice, or use an unused IP from your LAN range in the second position. Don't use Cloudflare or something else, or some of your DNS traffic will bypass Pi-hole.

Why should Pi-hole be my only DNS server?

Reduced Ad Blocking Capability The main reason you should Pi-hole as your only DNS server is that you will see increased performance in the blocking of ads. If you have two DNS servers (Pi-hole and something else), your network clients may not always query Pi-hole for name resolution. If a query happens to be answered from a non-Pi-hole DNS server, your block lists will not apply (since that DNS server doesn't know about them). All Queries Need To Go Through Pi-hole First Since other DNS se…

[amilopowers]

Tank you. I set Pihole twice. Lets see what happens.

[amilopowers]

I see more logs now.

What do you think? Is it better now?
https://tricorder.pi-hole.net/vIwT8eNv/

Btw 192.168.8.115 is the IP of my Pihole.