[ipv6hackers] the end is near (or for IPv6: the beginning)

Richard Barnes richard.barnes at gmail.com
Wed Jan 15 20:31:05 CET 2014

If NAT were only used in firewalls where asymmetry is an issue, that would
be a big win.  Many of the major problems with NAT today are due to NATs
for singly homed networks (e.g., home nets, SOHO nets).

On Wednesday, January 15, 2014, Edward Lopez <elopez at fortinet.com> wrote:

> This is my personal opinion and not necessarily one shared with my company.
> IPv4 stateful firewalls have a heavy reliance on NAT functionality as a
> means of resolving asymmetric routing issues that would otherwise be
> problematic in otherwise multipath routing environments.  Proxy devices
> resolve asymmetry as a natural result of explicit proxy functions.  As IPv6
> migration accelerates, and the adoption of native IPv6 addressing down to
> endpoints becomes predominant, we will begin to see interesting issues
> arise:
> - A sharp rise in asymmetry issues with stateful firewalls in multipath
> environments
> - An increase in direct attacks against IPv6 endpoints, due to the removal
> of the NAT boundary
> - A strong effort to deploy NAT66 (RFC 6296) for use in FW/CGN boundaries
> - A resurgence of proxy-based security
> - The need to resolve asymmetry will be is exacerbated by the deployment
> of IPv6 anycast services
> With the recent allegations that the NSA TAO has compromised a number of
> commercial stateful firewall systems, I would think that more intelligent
> organizations will be reconsidering their network security strategies in
> their migration plans to IPv6
> Ed
> On Jan 4, 2014, at 12:29 PM, Jens Link <lists at quux.de <javascript:;>
> <mailto:lists at quux.de <javascript:;>>> wrote:
> Marc Heuse <mh at mh-sec.de <javascript:;><mailto:mh at mh-sec.de <javascript:;>>>
> writes:
> Expect everyone in the USA to be totally surprised when this happens
> (like every year in Chicago in Winter when it starts snowing)  ;-)
> Or Windows XP support running out. ;-)
> Jens
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