Lew Wolfgang wrote:
On 11/17/2011 01:15 PM, James Knott wrote:
The random address will change, though I don't know when, other than rebooting does it. However, why do they insist on calling it "private", when it's not. It might be called a "privacy" address, as it makes it more difficult to trace, but it's still a public address that can be reached from the public internet. A private address is one that exists only on the local lan, such as the RFC1918 IPv4 addresses. The link local IPv6 addresses can serve the same function, as can other limited scope IPv6 addresses.
I agree about the "private" thing, but don't make anything of it. The fellow writing the note knows the difference.
Apparently OSX Lion will change it's "privacy" address once per day, and keep stale ones around for a while. Maybe this is to handle those really long round-trip packet time routes? :-)
That would be comparable to getting a new DHCP address every morning. And yes, it does hang on to old addresses for a while for that reason. With IPv6, it's possible to smoothly renumber an entire network with that. You just add on your new subnet, update the DNS, and eventually let the old addresses die, so you can turn down the old subnet.
As an aside, I once worked on a project that had round-trip packet times measured in hours. Ouch!!!
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