Back in 1.0 days, I tried using PPP as a server, the host could connect   
and everything was okay, until the client disconnected, the process   
wouldn't go away.  As a matter of fact it would just sit in memory and   
eat CPU time.  This happened for each client that connected and was   
cumulative (connect 5 times, 5 run away processes in memory eating CPU   
time and making a system very sluggish).

Under NetBSD 1.1 (i386) PPP no longer does this in either straight PPP   
mode or PPP-PAP mode.  I started working on PPP-CHAP and the same problem   
occurs, but only in PPP mode.  I was testing a package to see if it with   
automatically answer to a PAP or CHAP authentication query, since it   
doesn't I never actually get truly connected, I don't know if that will   
help or not.

jam