No DNS on Guest Network

[Danmoo]

For some reason no DNS is set for devices connecting to my guest network so they’re reporting there’s no internet once connected. This happened a few weeks ago so I completely reset my Hub 4 and set it up again like I did before. This seemed to have resolved the issue but today I’ve noticed it’s back. Why would my guest network not have any DNS settings?

As an FYI, My Hub 4 has the main network (192.168.0.X) set up with the DHCP server off as my raspberry pi running pi-hole handles this. The raspberry pi IP is also set as the DNS on this network and everything works fine.

What I don’t understand is why it worked for a period of time after resetting the router but now it doesn’t. Timing of this issue could coincide with the recent April 2023 outages but I can’t be 100% sure it wasn’t an issue before as the guest network is only used when guests come to our home.

any help is greatly appreciated

Dan

[g0akc]

What happens if you try without the pi, using the hub for DHCP and dns?

[legacy1]

You shall not have Guests 🤔 when you have pi-hole

[Danmoo]

will check today and report back.

[Danmoo]

Not sure what you mean?

[legacy1]

Maybe with hubs DHCP off guests can't get a IP and your pi-hole can't be a DHCP server for guests because its no a isolated network...unless you have a pi-hole on that network

[Adduxi]

I think the Guest network is on a different IP range, which would be outside the Pi's access?

[Danmoo]

Yes the guest network is on a different subnet so pi-hole will not work on that, which is fine.

Not had chance to re-enable dhcp to see if the DNS settings return for the guest network but will have a look today.

What I do know is the guest subnet didn’t loose it’s DNS settings on the SH3 with the same setup up I have now so it could be a SH4 issue.