On Wed, 18 Jun 2003, Chris Jones wrote:

> Frederick Bruckman wrote:
> > On Wed, 18 Jun 2003, Chris Jones wrote:
> >>What's going on here?  Even though I have no IPv6 DNS entries, legolas
> >>is using IPv6.  Is the 4-in-6 address translation automatic, then?
> >
> > The application on legolas could be using an IPv4-mapped address,
> > which looks like IPv6 to the application, while using plain old IPv4
> > transport. When you look at the numeric address, with "netstat -anf
> > inet6", does it start with "::ffff"?
>
> Yes.

That's what it is, then. This lets an IPv6-converted application run
on dual-stack hosts with no IPv6 connection whatsoever.

Frederick