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Re:AWS to start charging for IPv4 usage, but critical servic... by lxgr on Friday November 10, 2023 @12:50PM (#38222021)
They do go hand in hand, though.

Having globally unique addresses removes the need of (stateful) mapping tables, which in turn make it easier to intentionally allow traffic in.

In other words, it's quite hard to even name the traffic you want to let in if names are globally overloaded.

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