Hello,

There appears to be a current-kernel vs 1.5.2 userland problem with 
ipfilter:

# /etc/rc.d/ipfilter reload
Reloading ipfilter rules.
10:ioctl(add/insert rule): No such process
14:ioctl(add/insert rule): No such process
15:ioctl(add/insert rule): No such process
17:ioctl(add/insert rule): No such process
18:ioctl(add/insert rule): No such process
...
# uname -a
NetBSD localhost 1.5ZA NetBSD 1.5ZA (NETLUX) #0: Fri Feb  8 21:05:15 EST 
2002     boor@localhost:/usr/src/sys/arch/macppc/compile/NETLUX macppc

Andrew