this post was submitted on 20 Jul 2025
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Adblockers stop publishers serving ads to (or even seeing) 1bn web users - Press Gazette (pressgazette.co.uk)
submitted 3 days ago by 1984@lemmy.today to c/technology@lemmy.world
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They call it "dark traffic" - ads that are not seen by tech-savvy users who have excellent ad blockers.

Not surprised that its growing. The web is unusable without an ad blocker and its only getting worse, and will continue to get worse every month.

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[–] 1984@lemmy.today 3 points 2 days ago (1 children)

Its actually not easy to run two of them since they are not designed for using a shared disk (you can get corrupted data). Its also not necessary, you can just leave the secondary dns server blank.

But if you want two because you want high availability in case one of your piholes goes down, you can rsync the settings between the two machines every 5 minutes or so. Its important to keep them in sync that way.

[–] mic_check_one_two@lemmy.dbzer0.com 2 points 2 days ago

The secondary DNS isn’t for redundancy; machines will split requests across the two for load balancing. If you only have one running, you’ll end up with ads slipping through as the device still uses the default secondary DNS.