Https requests showing up in log

[bondskin]

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Expected Behaviour:

Running pihole 5.2.1 I have blacklisted app-measurement.com and it is working as expected.
But I see additional log entries which are not blacklisted regarding " https://app-measurement.com/sdk-exp"

Actual Behaviour:

https://app-measurement.com/sdk-exp 

is shown as accepted, which is a URL and not even a pure hostname

Debug Token:

https://tricorder.pi-hole.net/7531g3t210

[Coro]

@bondskin

is shown as accepted, which is a URL and not even a pure hostname

The entire URL is really shown as requested domain? Well, this is then a bug in the application querying this (they are free to query whatever they want, not only valid hostnames).

What was the result of this query? I doubt there was a (valid) reply for it. So no harm caused, however, also not a Problem with Pi-hole. If you want to see this being blocked, you'd need a regex to block app-measurement.com and similar domains, however, I don't think this is actually needed (see reason above: this URL-query shouldn't work in the first place).

[bondskin]

This is how it looks in the GUI.
And I agree, it cannot have any valid reply but it looks odd.

[Bucking_Horn]

Can’t add https://app-measurement.com/sdk-exp to blocking list

The query for https://app-measurement.com/ is likely caused by some application created using a faulty firebase SDK. While it doesn't make sense to query a DNS server for a URL, it's also nothing to worry about. As jfb has pointed out multiple times now, URLs will never resolve to anything with DNS, so there is also no need to block them.