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Discussion of the Android TV Operating System and devices that run it. For a list of official Android TV and Google TV devices please visit the Android TV Guide - www.androidtv-guide.com. This community is unofficial and is not affiliated with Google in any way.

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Why is my chromecast trying to access other devices in my network? (lemmy.pe1uca.dev)

submitted 3 months ago by pe1uca@lemmy.pe1uca.dev to c/androidtv@lemmy.world

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I was trying to debug an issue I have connecting to a NAS, so I was checking the logs of UFW and found out there are a lot of connections being blocked from my chromecast HD (AndroidTV) on different ports via the local IP.

Sometimes I use jellyfin, but that's over tailscale, so there shouldn't be any traffic over local IP, just over tailscale's IP.
But shouldn't have traffic right now since I wasn't using it and didn't have tailscale on.

The ports seem random, just sometimes they are tried two times back to back, but afterwards another random port is tried to be accessed.

After seeing this I enabled UFW in my daily machine and the same type of logs showed up.

So, do you guys know what could be happening here?
Why is chromecast trying to access random ports on devices in the same network?

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[–] Anticorp@lemmy.world 10 points 3 months ago

It wouldn't surprise me if Google is trying to identify the other devices in the household to add to their list of known devices for you, and increase their ever expanding data hoard.

[–] CMDR_Horn@lemmy.world 8 points 3 months ago (1 children)

Upnp?

[–] best_username_ever@sh.itjust.works 3 points 3 months ago

Could be that. It uses multicast on specific ports but I don’t remember the details.