User guide

Firebox Illustrations and Descriptions
Reference Guide 41
Sys B
Indicates that the Firebox is running from the read-only factory
default system area.
Security Triangle Display
Indicates traffic between the interfaces on the Firebox. Green
arrows briefly light to indicate allowed traffic between two
interfaces in the direction of the arrows. A red light at a triangle
corner indicates that the Firebox is denying packets at that
interface.
Traffic Volume Indicator
A stack of lights that functions as a meter to indicate levels of
traffic volume through the Firebox. Low volume indicators are
green; high volume indicators are yellow. The display updates
three times per second. The scale is exponential: the first light
represents 64 packets/second, the second light represents 128
packets/second, increasing to the eighth light, which represents
8,192 packets/second, which is the ceiling of the scale, but not the
Firebox.
Processor Load Indicator
A stack of lights that functions as a meter to indicate the system
load average. The system load average is the average number of
processes running (not including those in wait states) during the
last minute. The most significant load factor on a Firebox is the
number of proxies running. Low average indicators are green,
while high average indicators are yellow. The display updates
three times per second. The scale is exponential, with each
successive light representing a doubling of the load average. The
first light represents a load average of 0.15.
N OTE
A Firebox direct from the factory runs in Enhanced System Mode (Sys A).
In this mode, the functions of some of the indicators are modified.