Pihole blocking internet unless pi is restarted.

[Phil_Deveau]

Expected Behaviour:

Pi hole should be working as normal. Internet should be working as normal.

Actual Behaviour:

Some thing is randomly happening (2nd time in 2 weeks). Where i lose all internet connections. Only resolution seems to be to power cycle the rasberry pi...then once pihole boots back up it all works again.
No changes to the network this latest time happened while i was away and came ho.e to devices offline. I assume the loss of internet is due to the dns setup on my router pointing to the pi. But not sure whats causing pi to act like this... its only thing installed and has been running fine and i have updates automatically.

Debug Token:

WpcU5jGx/

[deHakkelaar]

Did you check network connectivety on the Pi when connecting KVM (Keyboard Video Mouse)?
Are you able to login on console?

Also check for below:

https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#power-supply-warnings

Could search all of the systemd journals with below for "under-voltage" messages:

sudo journalctl --full --no-hostname --pager-end --grep voltage

[Phil_Deveau]

Hey I'm not sure if pi was accessible during the outage ill be sure to check next time.
I searched for the under voltage msg and found it during those times but also today when I've had no issues. Does this indicate a bad power source? I'll have to double check but I'm pretty sure it's connected to my PSU.

[deHakkelaar]

@Phil_Deveau

Does this indicate a bad power source?

Yes.
Or a bad USB cable for power.
Or too many power hungry USB devices connected.

EDIT: Fix it quickly or you run the risk of the filesystem getting corrupted ... like described in the link!

[Phil_Deveau]

Will do! Thank your for your help! Much appreciated

Phil