nanog mailing list archives

Re: turning on comcast v6


From: Doug Barton <dougb () dougbarton us>
Date: Fri, 03 Jan 2014 00:40:42 -0800

On 01/02/2014 10:30 PM, TJ wrote:
I'd argue that while the timing may be different, RA and DHCP attacks
are largely the same and are simply variations on a theme.

Utter nonsense. The ability to nearly-instantly switch traffic for nearly-all nodes on the network is a very different thing than what a rogue DHCP server could do, even if you have ridiculously short lease times, which most don't.

Further, by far the common case is for network gear to _already_ be configured to avoid permitting hosts to act as DHCP servers unless they are supposed to be. It's rare to even find a network device that has RA Guard capabilities, never mind one that has them turned on.

There is simply no good reason not to include default route in the configuration for DHCPv6, and it's long overdue.

Doug


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