PF is driving a n00b mad

[Dan]

Hi all, I am new to PF. Trying to set up a simple, typical ruleset as
described on openbsd.org and other places. NAT works, rdr to a machine
behind pf doesn't. The documentation says it should work. What gives?

ext_if="dc0"
int_if="fxp0"



set skip on lo
scrub in


rdr pass on $ext_if proto { tcp, udp } from any to any port 5000:5009 -> \
192.168.0.4 port 5000:5009
nat pass on $ext_if inet from $int_if:network to any -> ($ext_if)

Thanks!