Tables make your life easier: command line

Command line tables manipulation:

Add a table entry

$ sudo pfctl -t clients -T add 192.168.1/16

Show table contents

$ sudo pfctl -t clients -T show >/etc/clients

Replace table contents from a file

$ sudo pfctl -t clients -T replace -f /etc/clients

Commonly used commands - likely scripting candidates

Tip: look into cron(8) jobs