From: Qiong <[email protected]<mailto:[email protected]>>


Just a quick question: I think NAT is a quite common function in firewall, is 
there some reason that it should not be included in IPv6 firewall ?

WG] Because NAT should not be used unless necessary. NAT is often confused with 
security (i.e. security by obscurity), but we’re really trying to break that 
conflation in IPv6 since it is also not necessary for address preservation and 
really shouldn’t be used for even 1:1 address translation since it is possible 
to add multiple addresses for hosts, so that they can have addresses for both 
internal and external scope, rather than the existing private/public NAT that 
happens in many networks today on IPv4.

So if anything, the document probably needs words to that effect so that it’s 
explicitly clear that this is a non requirement.

Wes George

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