this post was submitted on 03 Sep 2024
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Hmm, I wonder if there could be an exploit where Recall is covertly turned on, so it can be used to exfiltrate data. Not a good idea to basically have a surveillance rootkit sitting passively on your system, with no ability to remove it, just waiting to get abused by attackers. But using this proprietary garbage OS nowadays isn't a good idea in general and there is a much better alternative.
There's always the Microsoft telemetry blocklist in pihole. If you can't stop the computer collecting the data, you can stop MS getting hold of it.
It's not a 100% guarantee, they can easily bypass your DNS by either just connecting to another DNS sever over plain, unencrypted DNS (UDP on 53), or use something more sophisticated like DNS-over-TLS or DNS-over-HTTPS.
You can reroute unencrypted DNS requests to your Pi-Hole using a firewall like OPNSense, but things get more complicated with DoT and DoH