Enabling the automatic lock
The automatic Internet lock protects your computer if you leave it connected to the Internet for long periods even when you're not actively using network or Internet resources.
When the lock engages, only traffic initiated by programs to which you have given Pass-lock permission is allowed. All traffic to and from your computer is stopped, including DHCP messages, or ISP heartbeats, used to maintain your Internet connection. As a result, you may lose your Internet connection.
You can set the Internet lock to engage:
To enable or disable the automatic lock:
To set automatic lock options: