Disconnect? no internet for 1-2 minutes every 8-12 Minutes

Help
1

Hi,

since two days i run PiHole on a Raspberry Pi Zero W. Installed on rasbian lite. Connectes with WiFi and fix IP.

Expected Behaviour:
Every 8-12 Minutes i can´t reach any Internetsites für a time around 1-2 Minutes. This is the same on every Phone, Computer, Tablet in network. I looked around in this forum and other, but cant find a right solution. Only thing i found was a Problem with new System (7.20) for my FritzBox 6490. But I think this is not the same Problem. In Games it themes to be working without disconnects, but i don´t play so mutch.

Here is the debug.log. I hope ther is no personal Information :slight_smile: dindn´t found one on fast looking

THX
Hellbringer

Debug Token:
(Moderator edit: explicit Debug Log removed)

2

When providing a debug token, please just post the token that is shown once the debug finishes (preferably by copy and paste). For your own privacy and security, please do not post the full, unsanitised output here.

Please upload a new debug log and post the debug token generated by

pihole -d

or do it through the Web interface:

Tools > Generate Debug Log

3

Is this normal, that it needs very long time to generate a log with token?

thx
Hellbringer

4

Depends on what you consider a very long time, and what machine you run on.
On my own Zero, pihole -d completes in under a minute.

5

It hangs since many (~15 min.) on at this point you can see on picture.

Unbenannt

My device is Zero Pi W with Raspbian lite and PiHole on it. Same Problem on PiHole Webpage for logging, but on this side i cant see anything like in SSH.

thx
Hellbringer

6

You should be able to abort pihole -d by pressing Ctrl+C.
Try to run it again after rebooting your Pi-hole machine.

7

Now after two restarts it worked. Here is the token: https://tricorder.pi-hole.net/qi6kg6zyre

thx
Hellbringer

8

Your debug log does not show any apparent anomalies for your configuration.
Hoewever, there are some log messages stating a temporary failure:

*** [ DIAGNOSING ]: contents of /var/log/lighttpd

-rw-r--r-- 1 www-data www-data 4960 Sep 19 13:06 /var/log/lighttpd/error.log
   2020-09-19 11:45:52: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning:  dns_get_record(): A temporary server error occurred. in /var/www/html/pihole/index.php on line 227

This could be related to DNSSEC being enabled.

*** [ DIAGNOSING ]: Setup variables
    DNSSEC=true

DNSSEC needs an accurate time to work correctly.
RPis generally lack an RTC for keeping time during power downs, relying on internet connectivity to retrieve time information via NTP.

During time-syncs (especially after longer power-downs), Pi-hole may not be able to resolve DNS names, until an accurate time is set. On occasions, time-syncs won't work at all.
In that case, you may set your time manually, e.g. by

timedatectl set-time '2020-09-19 13:00:00'

If your time is currently correct, consider disabling DNSSEC to test if that would eliminate your intermediate DNS failures.

9

Hi,

ok I disabled DNSSEC and used another Power-Supply. I used Power direct from USB-Port of my Fritzbox. Now is gave PiHole own PowerSupply. But i hope i can use Power over FritzBox. I will report. Thx for fast answering.

thx
Hellbringer

10

To confirm your suspicion, you could also check your logs for recent under-voltage events:

zgrep -ni “voltage” /var/log/syslog*

Use grep if your system does not have zgrep.

11

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