> /etc/ppp/pap-secrets:
> I don't have one (first, i need pass the LCP problem), please post some
> example.

Negotiation of authentication is a part of LCP.  If you don't have a
pap-secrets file, you local PPP will NOT negotiate pap authentication.  But
the cisco is configured to require PAP.  The cisco sends a CONFREQ
(configuration request) asking for PAP and the NetBSD box sends a CONFREJ
(configuration reject) saying it won't do PAP.  Since this is not something
the cisco will allow, it sends another CONFREQ including PAP.  This repeats
until it hits the maximum number of negotiations allowed by the cisco and
then the cisco hangs up.

Create the pap-secrets file and you will get further.

Dave
(Used to hack the cisco PPP authentication code in a previous life.)