FTL 5.13 - clients timeout

[rnsc]

In raising this issue, I confirm the following (please check boxes, eg [X]) Failure to fill the template will close your issue:

• [x] I have read and understood the contributors guide.
• [x] The issue I am reporting can be replicated
• [x] The issue I am reporting isn't a duplicate

How familiar are you with the codebase?:

1

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[BUG | ISSUE] Expected Behaviour:

Pihole-FTL to reply to clients on the network.

[BUG | ISSUE] Actual Behaviour:

Pihole-FTL doesn't reply to clients and requests time out.

[BUG | ISSUE] Steps to reproduce:

• Just updated to v5.13 and the issue started to appear.
• Forcing a checkout of FTL v5.12.1 with pihole checkout ftl v5.12.1 fixes it.
• I have the same exact behaviour on an RPi (Debian 10) and a VPS (Debian 11).

Log file output [if available]

When clients aren't getting replies, I do not see errors in the FTL log (/var/log/pihole-FTL.log). I do see the network requests coming in with ngrep. I understand this isn't much, but I don't know what I can run to have more debug information to debug this issue.

Device specifics

Hardware Type: rPi and VPS OS: Debian 10 and Debian 11

This template was created based on the work of udemy-dl.

[DL6ER]

I do see the network requests coming in with ngrep.

Do you also see them in /var/log/pihole.log ? Do you have any custom config files in /etc/dnsmasq.d or possibly in /etc/dnsmasq.conf ?

[rnsc]

@DL6ER hey, I did some back and forth between versions to provide you more details, but now, without any configuration change, 5.13 works again, not sure what's going on. Will re-open, or re-create one if I encounter the same issue. Sorry for the noise!