User guide

The ZoneAlarm Personal Firewall
User Guide 133
• An animated black line underneath a key indicates that the
client is processing secure IP traffic for the connection.
• A single SA icon with several key icons above it indicates a
single phase 1 SA to a gateway that protects multiple phase 2
SAs.
The ZoneAlarm Personal Firewall
A personal firewall is a barrier between your computer and the out-
side world. A computer is most vulnerable at the connection points.
These connection points are called ports. Without ports, your com-
puter cannot connect to the Internet. For more information about
ports, see “Ports” on page 7.
ZoneAlarm protects these ports by following a simple rule: Block all
incoming and outgoing traffic unless you explicitly allow that traffic
for trusted programs.
When you use ZoneAlarm you often see New Program alert windows
similar to the following image.
This alert appears whenever one of your programs attempts to
access the Internet or your local network. This alert ensures that no
information leaves your computer without your authorization.
The ZoneAlarm personal firewall provides a brief tutorial after the
MUVPN client is installed. Follow the tutorial to learn how to use
this program.