Re: 6to4 relays [Re: WG Review: IPv6 Operations (v6ops)]

[Keith Moore <moore@cs.utk.edu>]

> > > if many 6to4 aware machines could implicitly bind to
> > > 2002:ipv4::something[*], v6only servers could try to connect to
> > > that as an alternative to something like the site-local faith --
> >
> > unfortunately that constrains how sites organize their networks,
> > which doesn't seem desirable.
> 
> This would only be a potential method for IPv6-only sites to connect
> to a remote end for which you only have an IPv4 address -- if you
> don't want it, include an AAAA record.

okay, why is it better to impose such assumptions on hosts and nets
(not to mention firewalls) "by default" (i.e. in the absence of an 
AAAA record) than to require them to declare their willingness to 
accept such traffic (by advertising an AAAA record)?

Keith