On Sat, Mar 31, 2001 at 10:57:11AM +1000, Robert Elz wrote:
> The real killer to IPv4 renumbering is all the other people that you don't
> know who have your IPv4 address recorded somewhere for one reason or
> another. That is what IPv6 really needs to avoid. And that includes
> making all things like router filter lists be able to use DNS names,
> and then use them correctly (update them as the TTL's expire automatically).
I agree but.... One problem I see, is that a DNS name might have several
addresses, and you might want to filter them differently. Only way out of
that, as far as I can see, is to register additional names for each of the
addresses. It might be that the filter parsers and builders are able to sort
out which addresses cannot apply in some situations, but still. Or you need
a filter language where you can say filter those addresses of foo.bar that
are "some conditional expression". I think one somehow could make router
renumbering actually change prefixes in filter addresses in the filters,
something like that must be implemented with great care, if it is possible.
Stig
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