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>No firewall rules, no unintentional leakage, no accidental logins

No guarantee that the box won't poke for ways to break out either, or was there a pinky promise? I guess it was somewhat easy to disguise it, the search box is supposed to constantly poke around and index things, right?

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My understanding of what the parent wrote is the phone line would be disconnected in the normal case - can't break out if it's physically disconnected.

I wonder… wouldn't a physically disconnected ethernet cable work as well?

That design probably has more with phone network penetration rather than corporate firewalls. The most likely use case for on prem Google would be far away sites with no connectivity except a phone line

We used it for intranet documents but I suppose it had multiple uses.

The phone line is disconnected, but maybe some other link isn't. I mean it would be an extremely cool hack but I wouldn't be super-surprised to learn that google deployed some sort of exfiltration search technology in these boxes.

> [A] search box is supposed to constantly poke around and index things, right?

Amusingly enough, that was Snowden’s approach, at least they way he tells it.

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