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Lindroid is an Android app that lets you run Linux in a container, with support for hardware-acceleration (liliputing.com)

submitted 5 months ago by [email protected] to c/[email protected]

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[–] [email protected] 8 points 5 months ago (2 children)

Hmm... I wonder if I could run pihole in an onboard container and force all my local device traffic through it...

[–] [email protected] 4 points 5 months ago (1 children)

I'm glad I wasn't the only one with this idea.

[–] [email protected] 6 points 5 months ago* (last edited 5 months ago) (1 children)

You can probably already do this on Termux, since PiHole doesn't need graphical acceleration.
Might have to create a proper Chroot though, dunno if their Proot tools would have enough privileges for this use case.

[–] [email protected] 2 points 5 months ago* (last edited 5 months ago) (1 children)

I think the tricky part is getting a virtual network interface from pihole that can be properly configured in the Android Settings > Connection & sharing > Private DNS > Specified DNS.

For this to work on the mobile device, you don't want pihole to make itself accessible on the external network interface, but rather an internal (virtual) interface that Android sees as a valid DNS server so that it can be permanently configured (otherwise you would have to reset the private DNS IP address every time you connected to a new WiFi network, and it would be tricky to get it working on the cell network at all).

I'm not sure if this is possible without running a more complete virtual machine that creates a virtual network adapter. Maybe a VPN app could be abused to redirect Android's outbound DNS requests to localhost?

[–] [email protected] 1 points 5 months ago

I think you can tweak the Android DNS settings in ADB

[–] [email protected] 2 points 5 months ago

You could use Termux for this. However, you won't be able to use containers. You would need to either build it from sources or run it in proot. I also think the DNS settings in Android are limited so you may have trouble getting it to work. You would need pihole to listen on a random available port and then somehow get android to send DNS to that port. So it probably wouldn't work.

However, your welcome to try just make sure you use the F-droid version of Termux.