When no DNS queries are blocked -> empty graph

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1

Hi,
I have a perfectly good working P-hole installation. It is blocking DNS queries when it should. However, when I am a few days from home I noticed that the graph stays empty. There are no blocked DNS queries (nobody is at home) but some devices do DNS queries which are ok. The moment I come home and start browsing the internet, the number of blocked queries increases, ads are blocked as it should be and the graph is showing again... I suspect the graph is not showing properly when the number of blocked DNS queries = 0...

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Regards, Jan

2

What's the output of curl http://pi.hole/admin/api.php?overTimeData10mins?

3

The output is:

{"domains_over_time":[15,17,14,15,13,14,13,13,14,14,13,14,13,13,14,14,13,14,13,13,14,16,13,14,13,13,14,14,13,14,13,13,14,14,13,14,13,13,17,14,13,14,19,13,14,14,13,14,13,13,14,14,13,14,13,13,14,14,13,14,14,13,14,14,13,14,13,13,14,14,13,14,13,13,14,14,13,16,13,13,14,14,17,14,13,13,14,14,13,14,13,13,14,20,13,16],"ads_over_time":{"1":0}}

4

Run pihole -d for a debug token.

5

debug token is 5fzdpbs1ib

But the strange thing is: after the pihole -d I do now have a graph... You may analyse it but it's also ok to leave it. I'll experiment the coming days with this.

Regards, Jan

6

The debug script does check if ads are being blocked by getting the IP address of doubleclick.com, so it would have added one to the number of blocked queries.

7

It did.. blocked domains is now 1. I am still not at home, working remotely on the Pi at the moment.

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8

I'm still looking into this, btw. Just haven't had too much time over the weekend.

9

Ok, no hurries... I experimented a little further with this: I was not a home this weekend (nobody home) so there were no blocked DNS requests. As I have several online devices in my home there were still DNS request going out. The Pi-hole admin page and Pi is remotely accesible (by me :slight_smile: ), I could see that after midnight the graph disappeared; in the 'dns queries today' block I could see the number increasing, while the graph only showed a period of one hour with 0 dns requests (the same as in my opening post). Then I vpn'ed to my Pi, issued a pihole -d command et voila, the graph returned correctly with the number of dns requests and 1 blocked request (doubleclick.com). So my guess is that after midnight (after flushing or rollover of logs) the graph is not displaying correctly until at least 1 DNS request is blocked. Maybe you should do a scheduled dns request to doubleclick.com every day at 00:01 :slight_smile:

Regards, Jan

10

So your installation is working properly, but it sounds like maybe you discovered a minor bug: the graph doesn't display until at least one ad is blocked?

11

Correct. The graph displays as posted in my opening post until at least 1 dns query is blocked. The numbers in at the top in the ' dns queries blocked today' and 'dns queries today' are correct though, but these numbers are not showing in the graph and the graph is only showing a period of 1 hour. Apart from this, pihole is working perfectly, no complaints about that :slight_smile:

Regards, Jan

12

I suppose I have never run into this since ads are so prevalent, that I tend to have at least something blocked.

I will see if I can replicate this and then submit a bug report.

13

Thanks. I only discovered it because I was a few days from home so at home ther were no ads to be blocked (and because I looked at the admin page when I was not at home).

Rgrds, Jan

14

A post was split to a new topic: Zero DNS queries