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 Subject :Windows 7 randomizes addresses?.. 2009-11-21 14:47:40 
jomax141
Joined: 2009-07-19 13:10:34
Posts: 4
Location: 
hi there
why does windows 7 randomizes its ipv6 address? It should be based on the mac address, right?

Jo
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 Subject :Re:Windows 7 randomizes addresses?.. 2009-11-21 15:37:47 
erwin
Joined: 2009-07-11 16:46:01
Posts: 12
Location: Amsterdam
Hi Jo,

You are right. Windows 7 (Server 2008 & Vista as well) by default randomizes ipv6 auto-configured address selection. This is in violation with section 4 of RFC 2464 that mandates that the network identifier part of the IPv6 address is derived from the 48-bit MAC address for Ethernet (and Wireless) interfaces.
It may be that Microsoft chose to do this for privacy reasons..

For most users this will not be much of a problem but for those running a server it will. There is however a solution:

netsh interface ipv6 set global randomizeidentifiers=disabled

This will switch the feature off and address selection will be based upon the EUI-64 identifier, derived from the interface’s built-in 48-bit IEEE 802 address.

Erwin
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Last Edited On: 2009-11-21 15:37:47 By erwin for the Reason
 Subject :Re:Windows 7 randomizes addresses?.. 2013-01-10 06:33:11 
hiredotnetdeveloper
Joined: 2013-01-10 05:17:17
Posts: 2
Location: India
 
Windows 7 (Server 2008 & Vista as well) by default randomizes ipv6 auto-configured address selection.
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 Subject :Re:Windows 7 randomizes addresses?.. 2013-02-22 10:47:33 
phpdevelopment
Joined: 2012-12-22 06:48:17
Posts: 4
Location: India
 
One of the added security features with IPv6 addressing is “Temporary address interface identifiers”
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