turning on comcast v6

Enno Rey erey at ernw.de
Fri Jan 3 07:35:00 UTC 2014


On Thu, Jan 02, 2014 at 08:57:14PM -0800, Matthew Kaufman wrote:
> On 12/30/2013 4:56 PM, Owen DeLong wrote:
> > You can accomplish the same thing in IPv4?.
> >
> >
> > Plug in Sally?s PC with Internet Connection Sharing turned on and watch as her
> > DHCP server takes over your network.

for the record it should be noted that this particular issue was fixed by Microsoft a while ago (see http://support.microsoft.com/kb/2750841/en-us).



> Not nearly as fast as bad RAs do (as others have pointed out).
> >
> > Yes, you have to pay attention when you plug in a router just like you?d have to pay attention if you plugged in a DHCP server you were getting ready to recycle.
> But the ability to plug in a not-router and break things is oh so much 
> greater.
> >
> > Incompetence in execution really isn?t the protocol?s fault.
> But it is the protocol designer's fault... and once shipped, the 
> protocol's fault. There's all sorts of things that were known at the 
> time IPv6 was designed that the designers failed to build solutions for. 
> As an example, routers *could* be a lot smarter about sending RAs on a 
> network where routers are already present, but that's not in the spec.
> Neither the ND DOS attack nor the need to protect against bogus RAs on 
> every port of your switch but one (or rarely, two) are things that 
> should have been a post-deployment surprise (to name just a couple pet 
> peeves of mine... there's more design flaws that could have been easily 
> avoided had enough people cared to do so).
> Matthew Kaufman

Enno Rey

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