this post was submitted on 16 Oct 2026
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[–] LemmyPlaceDN@europe.pub 7 points 1 day ago* (last edited 1 day ago) (4 children)

I only know the basics of networking, so I've been wondering why this "DNS-sinkhole" functionality can't simply be implemented directly in private routers (as some kind of blocklist) instead of adding a new device to your network. Do routers not support this for technical or security reasons?

[–] Appoxo@lemmy.dbzer0.com 3 points 20 hours ago

The german router "FritzBox" recently did implement this.
A very rudimentary version of it but still.

[–] glitch1985@lemmy.world 7 points 1 day ago

Most consumer routers don't offer this functionality out of the box, likely because manufacturers don't consider it essential for most users. There's no major technical reason it couldn't be built in though. You can already set up DNS sinkholing with OPNsense or pfSense if you don't mind running and managing your own router.

[–] BlackSwan@lemmy.blahaj.zone 7 points 1 day ago* (last edited 1 day ago) (1 children)

Routers are usually hardware level optimized for throughput, filtering is inherently computationally expensive compared to routing (not crazy expensive just more than usually fits an FPGA), especially if you have to keep up multi-gigabit throughput

You could totally do it at the router, it would just become a more expensive piece of hardware and most people choose to cheap out

[–] cron@feddit.org 3 points 1 day ago

I doubt a DNS filter would noticeably increase CPU usage. We’re not talking about deep packet inspection here.

[–] RememberTheApollo_@lemmy.world 4 points 1 day ago (1 children)

A Raspberry Pi 3b is adequate to run PiHole to do the job, or implementing AdGuard DNS.

However, these require a little skill and knowledge to implement.

Consumer routers aren’t built to do the job.

[–] IphtashuFitz@lemmy.world 2 points 1 day ago

I love my Pihole. It blocks ads on my PCs, my iPads, our streaming devices, etc. It also blocks telemetry gathering by other device manufacturers.