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RE: Netfilter (Linux) Does IPv6 NATx

2011-12-07 13:45:43
Hi Martin, 

As long as the current IPv4 characteristics are not transparently
available with IPv6, it will probably deter adoption of IPv6 for the
installed base.


I would argue that this is a commonly held incorrect view:  The problem is not 
that feature sets are unavailable, but that there is no compelling local 
economic case for installing IPv6.

IPv4 networks could not do everything that IPX networks were doing when the 
Internet boom occurred.  There was a compelling local use case which drove 
parallel adoption.

What we should be doing is identifying the key features of IPv6 that cannot be 
addressed by IPv4, and ensuring that these are available.  If these are good 
enough, IPv6 will be deployed.

Today the only feature IPv6 has which is absolutely better than IPv4 is 
end-to-end addressability.

Introducing CGNs places a barrier to this addressability.

Really if you want address-user unlinkability, use HMIPv6 or some other 
signalling based protocol to get temporary addresses in the carrier.  At least 
in that case the applications will know their addresses because they will be 
locally configured.

Greg Daley
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