[ipv6hackers] Generation of Interface-IDs in Windows 7
fgont at si6networks.com
Thu Nov 10 05:24:58 CET 2011
As you probably know, Windows 7 generates autoconfigured addresses with
a different algorithm than that specified in RFC 4862.
In other words, it does not embed the MAC address in the Interface ID,
because of the privacy implications of doing that.
Supposedly (i.e., as once told by some MS guy), the interface ID was
generated as a result of hashing the network prefix together with other
(secret?) data, such that the Interface ID remains constant for a given
network, but changes as the host moves from one network to another.
However, I see that the same interface ID is generate when multiple
prefixes are advertised by a SLAAC router.
Has anyone figured out the algorithm that Windows 7 uses for generating
the Interface IDs?
e-mail: fgont at si6networks.com
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