randombullet comments on Some Google Home Speakers downloading massive amounts of data in the background

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[–] randombullet@programming.dev 5 points 1 week ago (4 children)

I redirect all out going dns requests to my self hosted DNS server.

Only one I can't block is DoH. DoT is easily blocked and my firewall picks up on it.

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[–] bamboo@lemmy.blahaj.zone 1 point 1 week ago (3 children)

Could you block DoH entirely on the network level and cause it to fallback? I guess you'd have to have a list of common DoH IP addresses to block.

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[–] towerful@programming.dev 4 points 1 week ago (2 children)

You have the destination IP to work with, thats it. Otherwise it just looks like any other HTTPS traffic.

I guess if you uplpaded your own root CA cert tgen you could man-in-the-middle for deeper packet inspection.
Or, i guess, try using eMudhra's compromised private keys and hope the clients havent been updated yet

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[–] bamboo@lemmy.blahaj.zone 2 points 1 week ago (1 child)

Right, I guess as more DoH servers become available, it'll be harder to track, but you could intercept and blackhole any HTTPS traffic to one.one.one.one and other popular servers to have them fallback.

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[–] towerful@programming.dev 1 point 1 week ago*

Yeh, exactly. "You have the ip to work with"

one.one.one.one isnt an http/ request, its a dns lookup.
If it was an http/s request to 1.1.1.1 then it could be blocked. Also, super cheap/easy to proxy

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