Thank you. that solved it. But it is contrary to the NetBSD documentation
which says for ifconfig:

inet 0.0.0.0 0.0.0.1 link1 down

and for isdnd.rc:

autoupdown=no

for non flatrate connections. If I understand things right, I have to
allow autoupdown.
The bad behaved application holding the line open was named which I set up
for a caching nameserver (NetBSD Guide)and which happily chatted with
every other nameserver it could get. A hint to make named less talkative
would be appreciated because my old router is still active and the
smalltalk will cost me some Euros.

Torsten

On Tue, 9 Dec 2003, Martin Husemann wrote:

> You need to have the interface up, otherwise it is not allowed to dial.
> Do you have link1 set on ippp0 ? If not, it uses "flatline" mode and always
> tries to stay connected.
>
> If you have link1 set, but it does not disconnect, there either is traffic
> that prevents it from reaching the idle timeout (quite possible with todays
> steady stream of scans) or your isdnd configuration is wrong.
>
> Martin
>
>