"No internet" when setting Pi-Hole as DNS server

[cyrnet]

Please follow the below template, it will help us to help you!

Setup Pi-Hole on OSMC, everything seems to be working fine. I can access the admin interface. I have set listening to all interfaces, just in case (the Rasberry is connected via ethernet). I have disabled the DHCP (my router can handle it) and as soon as I set the router DNS setting to the Pi-Hole, all the connected devices lose internet access. I have checked many previous posts for the same issue with no luck.

Any help appreciated. Thanks!

Expected Behaviour:

Connected devices should have internet access.

Actual Behaviour:

Mobile phone shows "No internet". Laptop internet requests time-out.

Debug Token:

https://tricorder.pi-hole.net/7er36kpvqr

[BrownForce]

I’ve had this very same problem after every update or reinstall of PiHole. Usually, for me at least, after setting the router’s “LAN” DNS to the PiHole I lose all connectivity till the PiHole is rebooted. That may be because I have Cloudflared installed and rebooting forces a DNS restart. Also, please make sure you’re adding PiHole to the LAN DNS settings and not the WAN DNS settings. If that doesn’t help, get a debug log token and some of the Gurus here will chime in shortly.

[deHakkelaar]

@cyrnet

as soon as I set the router DNS setting to the Pi-Hole

@BrownForce

after setting the router’s “LAN” DNS to the PiHole

More specific, you only have to set the DHCP service DNS setting on the router:

Setup help pihole and tp link router, some devices no internet.

EDIT: I was just to post below @jfb Setup router as described in below FAQ (methods 1 or 2): Disconnect client(s) from network and reconnect. Check what DNS server(s) is/are assigned to the clients via the router DHCP service. On Linux/MacOS clients run below: cat /etc/resolv.conf Or if Linux network-manager is installed, check profiles: nmcli connection show --active nmcli connection show <UUID> | grep -i dns Or on Windows clients: ipconfig /all | findstr "Server" Or on And…

If dont have those settings on the router, you can try do below:

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…

[cyrnet]

Thanks BrownForce and deHakkelaar for your replies.

BrownForce: Tried that with no success. My router only mentions "DNS" and I start to believe that it means "WAN DNS". And from other replies in this forum, I figure out that it is quite common for ISP routers not to provide an option to change the "LAN DNS".

deHakkelaar: I installed Pi-Hole on OSMC which interferes with the DHCP functionality. I will give it a try on a separate Rasberry over the weekend.

For now, I have changed the DNS on the devices and seems to be working.

Thanks all again for the help!