In this example, the firewall IP is IPF and the connecting client IP is IPC. The appropriate ipchains command to close the ports and log connections is: ipchains -A input -p tcp -s 0/0 -d IPF/32 ...

The command-line interface of your Mac lets you get into the Unix underpinning that makes Macs so powerful. Learn the top commands everyone should know to be a Mac power user. Over the years ...