NetBSD-5.0.2/regress/sys/kern/ipf/regress/f8

block in proto tcp from any to any flags S
pass in proto tcp from any to any flags S
block in proto tcp from any to any flags S/SA
pass in proto tcp from any to any flags S/SA
block in proto tcp from any to any flags S/APU
pass in proto tcp from any to any flags S/APU