Internet endpoints for enabling OEM-unlocking?

sog9

I just learnt that I am expected to connect stock Google Android to the Internet once so that the otherwise greyed-out OEM-unlocking feature becomes available, allowing to actually switch to GOS.

To make this less uncomfortable - privacy-wise - I'd like to set my WiFi-router to temporarily only allow access to what is definitely required.

Does anyone know the host(s), protocol and ports that are needed for this?

de0u

sog9 I just learnt that I am expected to connect stock Google Android to the Internet once so that the otherwise greyed-out OEM-unlocking feature becomes available, allowing to actually switch to GOS.

That is indeed a requirement Google imposes. It is documented on the GrapheneOS installer page.

sog9 To make this less uncomfortable - privacy-wise - I'd like to set my WiFi-router to temporarily only allow access to what is definitely required.

Some people briefly sign in to a public Wi-Fi network, perhaps at a library or coffee shop.