Perform PTR lookups for Persistent Clients

[rcdailey]

Prerequisites

• I have checked the Wiki and Discussions and found no answer

• I have searched other issues and found no duplicates

• I want to request a feature or enhancement and not ask a question

Description

What problem are you trying to solve?

As a user, I want to see resolved client names in query logs even when those clients match a Persisted Client entry in the Client Settings page.

Proposed solution

I propose that PTR / rDNS queries should still take place for all clients, even if they match a "Persisted Client" setting in the "Client Settings". The name of the "Persisted Client" entry should instead serve as a fallback name if that rDNS query did not happen or returned no result.

Alternatives considered

None.

Additional information

My personal use case for persistent clients has nothing to do with rDNS queries. I create persisted clients to represent subnets in my network. In many cases, those subnets are defined by the DNS rules I apply to them. For example, I have a subnet dedicated to my kids devices. For that subnet, I want to be able to block various services in AGH, such as Youtube. By doing so, however, I no longer have useful client names in the Query Logs due to the PTR/rDNS lookups not taking place.

Original discussion: #5737