#

# pass ack packets (ie established connection)

#

pass in proto tcp from 10.1.0.0/16 port = 23 to 10.2.0.0/16 flags A/A

pass out proto tcp from 10.1.0.0/16 port = 23 to 10.2.0.0/16 flags A/A

#

# block incoming connection requests to my internal network from the big bad

# internet.

#

block in on le0 proto tcp from any to 10.1.0.0/16 flags S/SA

# to block the replies:

block out on le0 proto tcp from 10.1.0.0 to any flags SA/SA