Pi Hole works on Wifi but not on Ethernet

[tba123]

Hello,

I wanted to run pi hole in directly on the clients. It hast just worked by making changes in the etc/network/interfaces file namely i put the ipv6, which comes out on ip a, inet6 for eth0 in there. And I added ipv6 on the interface on Pi Hole.

On my PC, that runs on lan and on my laptop that runs on wifi, i changed the IPv4 DNS to the address of my pi Hole. And i changed the IPv6 DNS to that IPv6 I added to the interfaces file but left out the last part of it.

The Laptop runs pi hole well. The PC does not. and when I put the lan cable to my laptop it also does not work.

So pi hole runs on wifi but not on lan

(im a complete newbie)

Expected Behaviour:

Pi Hole should work on Wifi and on Ethernet

Actual Behaviour:

Pi Hole only works on Wifi

[chrislph]

Would you be able to create a debug log please? You can do this in Tools > Generate debug log > Upload debug log and provide Debug token > Generate debug log. Post the token here and then we can take a look for any network oddities.

[tba123]

Hello here's my Debug Token:
https://tricorder.pi-hole.net/dmX48zSu/

[rdwebdesign]

This is a network configuration issue.

Your log shows eth0 interface has no IP:

*** [ DIAGNOSING ]: Networking
[✗] No IPv4 address(es) found on the eth0 interface.

[✗] No IPv6 address(es) found on the eth0 interface.

[i] Default IPv4 gateway(s):
[i] Default IPv6 gateway(s):

And Pi-hole didn't found any DHCP servers on your network:

*** [ DIAGNOSING ]: Discovering active DHCP servers (takes 10 seconds)
   Scanning all your interfaces for DHCP servers
   Timeout: 10 seconds
   DHCP packets received on interface wlan0: 0

[tba123]

Do you have a possible solution for me?

[jfb]

Fix your underlying OS so it has connectivity to your network. Visit the forums for your hardware and OS to get the best advice for this.

This could be a configuration issue, bad hardware on the SBC, bad cable, bad port on the router or switch, etc.

[rdwebdesign]

Complementing the answer above:

You configured Pi-hole to use eth0:

*** [ DIAGNOSING ]: Setup variables
    PIHOLE_INTERFACE=eth0

Your eth0 interface is DOWN (probably the cable is not connected), but the wlan0 is UP.

You can try to run pihole -r and reconfigure Pi-hole to use wlan0.

[tba123]

So, at least the first problem "[✗] No IPv4 address(es) found on the eth0 interface" went away. Thank you a lot. This is my new Debug Token: https://tricorder.pi-hole.net/rvdskVNO/ Do you have more solutions?