2007/10/4, Bill Stouder-Studenmund <wrstuden@netbsd.org>:
> On Tue, Oct 02, 2007 at 09:52:11PM -0400, Brian A. Seklecki wrote:
> > On Sun, 2007-09-30 at 14:21 +0200, Zafer Aydogan wrote:
> > > hello list,
> > >
> > > Giving -4 only affects name resolution and passing -I iface does use
> > > ipv6 anyway on the given interface and on lo0.
> > >
> >
> > Z:  Isn't there a syctl? net.inet6.bindv6only etc.?
>
> If you look at the log, such a thing wouldn't help.
>
> > > $ sockstat -l
> > > root     ntpd       22109 20 udp    *.ntp                 *.*
> > > root     ntpd       22109 21 udp6   *.ntp                 *.*
>
> There are two separate sockets, a v4-only one and a v6-only one. Thus
> something trying to keep v6 sticking to v6 won't work so well.
>
> What needs to happen is for ntpd to not bind to all addresses.
>
> Take care,
>
> Bill
>
>

One solution is to use openntpd from pkgsrc.
In openntpd you can define, where to listen.

$ sockstat -l
_ntp     ntpd       15586  6 udp    localhost.ntp         *.*

What about replacing ntpd with openntpd in base ?

Zafer.