Daily PiHole Crash, DHCP/DNS on Business Network

[deHakkelaar]

@Luke_Austin

On the first few days I ran pihole as my DHCP server, The RPI5 on which Pihole is running had needed to be restarted manually, as it became unresponsive to SSH requests, which is impractical as I'm not always on hand to resolve the issue.

After a fixed 12 or 24 hours or so?
Thats a common one if the Pi isnt configured with a manual static IP but instead with one thats acquired automatically via DHCP.
Part of the switch procedure is to disable the routers DHCP service.
So after 12 or 24 hours or so, the current active DHCP lease on the Pi expires (the one from the router) and the Pi loses its IP details resulting in that you cant connect anymore.
And a DHCP server (the Pi) cant supply itself with a unicast IP address.

$ sudo pihole-FTL dhcp-discover
Scanning all your interfaces for DHCP servers
[..]
   lease-time: 86400 ( 1d )

Have a look at below solution:

Pi-hole eth0 no address

I set up pi-hole (on a raspberry pi 4 connected via ethernet) for my home hub 4000 (bell) recently. Given that this router can't configure the devices to use pi hole, I turned off the dhcp of my router and set it on pi-hole. Occasionally, the pi-hole stops working and disconnects (despite being connected by ethernet, I can't ssh into it). During this time, the internet is off for most devices connected to the pi-hole dhcp. Expected Behaviour: I should be able to have my devices connected to the…