[ipv6hackers] IPv6 security presentation at Hack.lu 2011

Fernando Gont fgont at si6networks.com
Tue Sep 27 21:36:39 CEST 2011

On 09/27/2011 04:09 PM, Douglas Otis wrote:
>>  Yeas ago, you couldn't rely *only* on SLAAC, since it didn't yet
>>  support the RDNSS option (which is vital in most network deployments)
>>  -- even with RDNSS now *specified*, it is still not widely deployed,
>>  and hence you cannot rely on SLAAC alone.
>>  OTOH, you cannot rely on DHCPv6 alone if you cannot get a default
>>  route with it.
> DHCP is not needed when there is a desire to simplify the network
> architecture. 

That depends on what you mean by "simplify", or *what* (specifically)
you want to simplify. e.g., DHCPv6 makes logging trivial. However,
SLAAC+Privacy Extensions makes it rather difficult (at least with
publicly available tools).

> RFC5006 introduced RDNSS in 2007, and was upgraded to
> standards track in 2010 where DNS Search Lists (DNSSL) option was also
> included.  It should also be noted a large IPv6 provider's CPE supported
> the RDNSS option for years with their 6RD deployment.  

Last time I checked (1-2 years ago), neither Windows, nor any of the
open source OSes I was using supported RDNSS by default.

> Real LAN based security remains possible with SeND, 

... if only one could deploy it for the general case.

Fernando Gont
SI6 Networks
e-mail: fgont at si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492

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