this post was submitted on 27 Apr 2024
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Android has built in support for VPNs. If there was a way for the OS to leak traffic, that would be a massive security vulnerability that would have corporations dumping all android company phones within a week.
Non root ad blockers work by creating a vpn within the phone that all network activity goes through, which then doesn't allowed ad traffic.
https://www.bleepingcomputer.com/news/google/android-leaks-some-traffic-even-when-always-on-vpn-is-enabled/
ew
But also benign. This isn't a system app sending telemetry to google outside the VPN connection while it's active. It's the device checking whether a wifi access point provides internet to begin with, which if it does, the VPN connection will need to work, too.
The article is pointing out that the device doesn't strictly need to do this, and that it is being done in a way the gives the wifi AP metadata. The device could instead just assume there is an internet connection on the wifi, and as such an option to disable this behaviour is warranted.