How to preempt rogue RAs?

George Bonser gbonser at
Sat Oct 30 18:38:20 CEST 2010

> I've briefly tried to reproduce the problem with a Windows 7 box I
> here by turning on ICS on a IPv4-only LAN segment, and while I could
> see
> it activating the local 6to4 tunnel, it did not start transmitting RAs
> for that prefix.  So I'm not 100% sure if ICS is involved, and if it
> is,
> exactly how it has to be set up in order for the rogue RAs to show up.
> If somebody knows more in detail how ICS/6to4 operates I'd appreciate
> hearing about it, or if somebody has any suggestions on how it would
> have to be configured in order to break I'll be happy to try it out in
> my lab.

Did you also have the "routing and remote access" service enabled?  That
turns the windows box into a router.

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