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by kstrauser 3485 days ago
You'd more likely want them for outbound connections. On modern OSes, the IPv6 stack periodically calculates a new IP (see https://tools.ietf.org/html/rfc4941). Think of it as a kind of one-time-use address, so remote machines can't say "hey, I got a download request from this IP last week. I should try to hack it today!"