Basic PF Configuration
Kyle Amon,  Page 5 
Files

/etc/pf.conf
/etc/nat.conf

Commands

pfctl, pflogd, ftp-proxy

Handy Aliases

alias rpf='pfctl -F rules ; pfctl -v -R /etc/pf.conf'
alias rnat='pfctl -F nat ; pfctl -v -N /etc/nat.conf'
alias rpfnat='pfctl -F all ; pfctl -v -R /etc/pf.conf -N /etc/nat.conf'