- Speedport Smart Router (Deutsche Telekom AG)
- Speedport ISDN-Adapter for phones
- Raspberry Pi with Pi-Hole
- Other network devices
With DCHP turned off on the router and enabled on the pi-hole i expected all local network devices to use the pi-hole as dns server which they probably do.
All “normal” internet devices get the dns filter from the pi-hole as expected.
Problem: ISDN Adapter doesn’t connect to the provider’s servers any more! (even with the pi hole filter turned off)
With DCHP enabled on the router and disabled on the pi all devices work properly. The issue with this solution is that I’ve to manually configure each device to use the pi as dns server. In order to solve this I tried to set the pi as the default dns server of my router (pic1).
Surprisingly, this didn’t change anything.
I also don’t think that I’ve configured something wrong in terms of the dhcp settings because all normal devices are working. Just ask, if you need more details on the config.
If you have an idea what might be wrong, you’re free to tell me
Thank for your help.