Adding "Alert only" mode for blocklists/parental controls/browser security

[patricksaw]

I have had issues implementing house-wide adblocks before with identifying what would actually be blocked with our normal browsing patterns and what might cause issues for others in the house. In addition my kids are getting a little bit older, and while there is some stuff I may want to block, more importantly I want to know what is being accessed so I can have a discussion with my kids versus just blocking outright (Which, having been a young person in that position once, simply prompted me to work around the block - which in the case of a DNS only solution is not difficult).

Thinking from the perspective of WAFs that block inbound traffic, they will always have an alert mode that the admin can use to see what would be blocked if blocking was enabled, and avoid false-positives or unwanted blocks and then that data could be used to make blocking decisions with. I wanted that same functionality to be able to report/alert on matches to the blocklist and parental controls/browsing security without actually blocking things until I'm ready.

I've built this out in a fork and am now running it on my local network. Screenshots attached - Would love to get feedback and if this is a useful core feature I can make whatever adds/changes and create a PR. I have the alerts being tracked separately in statistics, adding them to the dashboard will be my next step.