Hi there! Recently my pihole won't let my devices connect to the internet although pihole itself can update and my router shows no issues. The problem shows up very randomly and goes away all by itself again. I can't do anything about it. It has happened twice since yesterday, which surprises me.
Since bypassing pihole solves the issue, I guess the problem is burried somewhere here. The system used to work for over 2 years now.
I have debugged, here is the token: pfIjsFyF
My problem seems to be very much the same as another user has experienced here:
- SSH works
- the IPs have not changed
- the dns of my router refers to my raspberry pi which has pihole installed
- all ping tests suggested below were successful
Here are some troubleshooting steps that you can do from your Pi-Hole to see if there is a routing issue:
ping 8.8.8.8 (Google DNS server IP - to test Pi-Hole Internet access)
ping one.one.one.one (to test Pi-Hole Internet access with DNS)
ping dns9.quad9.net (to test Pi-Hole Internet access with DNS)
ping <router-ip> (to test Pi-Hole connectivity to router - usually router IP is 192.168.1.1)
The router ip (192.168.75.1) shown in /etc/dhcpcd.conf seems correct to me, although route throws 192.168.75.0 at me. Dunno what this means though.
Edit: I somehow solved the issue. I inserted new upstream dns servers both in my router and for pihole. The thing that seems to have done the trick is changing the interface settingsnfrom "allow only local requests" to "respond only on interface eth0". I am btw not using port 53, its closed.
Anyway, I have no clue what all of this means and in how far this really is the solution to my problem. Can anyone tell me more about all this?
Thank you very much for your help!