Monthly Archive: December 2014

Dec 15

“Disabling” IPv6 – breaking down the DisabledComponents registry value

I’ve gotten an elevated number of requests recently on “how do I disable IPv6” or “what’s the best way to configure IPv6 in my environment”. I’m not entirely certain of why I’ve gotten so many recently, and I’m not sure if it’s a coincidence or if there’s more to it. However, what I’ve found is that most IT departments I’ve come across over the years simply go and set IPv6 to completely disabled via setting the disabledcomponents registry value to 0xffffffff. While this does indeed disable IPv6 entirely, I have to warn everyone I come across with this set that Microsoft doesn’t test this setting at all, and support for resolving issues with this set have usually resorted to setting disabledcomponents back to 0x0 and retesting, where things magically work, and that’s the extent of what is done for obvious reasons. This can (and sometimes does) also break functionality in Windows, and the one that most customers eventually run across is DirectAccess (with Remote Assistance in second).

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