Back=right mouse click.
There are three ways to enable/disable IWSVA Web scanning:
From the main IWSVA menu, click Summary, then HTTP(S) Traffic: Turn On (stops all Web traffic)
From the main IWSVA menu, click HTTP > HTTP Malware Scan > Policies and then Enable virus scanning
Open a terminal and issue the following command (stops all Web traffic):
/var/iwss /S99ISproxy stop
The three methods are synchronized. Upon the next screen refresh, IWSVA reflects any changes made using one method in the others.