I did what's here:
http://www.netbsd.org/Ports/mac68k/theobald/#first-things- 
first_configuring-for-networking  (setting up)
"Finally, to allow yourself to log-in via telnet from the other  
machines on your LAN. Edit /etc/inetd.conf. And un-comment (ie remove  
the # at the beginning of the line) the things you want to use. This  
will usually be ftp, telnet, shell, and login. "

I uncommented all lines except the ipv6 ones.  That gives an error at  
boot time, and I can not login ...

It  seems I really need to uncommeny both ??

Marc