User's Manual

Chapter 14 Firewall 161
14.5 DoS Screen
Use this screen to enable DoS protection. Click Security > Firewall > Dos to display the following
screen.
Figure 105 Se
curity > Firewall > Dos
The following table describes the labels in this screen.
Table 65 Security > Firewall > Dos
LABEL DESCRIPTION
Denial of
Se
rvices
Enable this to protect against DoS attacks. The Device will drop sessions that surpass
maximum thresholds.
Apply Click this to save your changes.
Cancel Click this to restore your pr
eviously saved settings.
Advanced Click this to go to a screen to sp
ecify maximum thresholds at which the Device will start
dropping sessions.
14.5.1 The DoS Advanced Screen
For DoS attacks, the Device uses thresholds to determine when to start dropping sessions that do
not become fully established (half-open sessions). These thresholds apply globally to all sessions.
Type Click Single to specify one port only or Port Range to specify a span of ports that define
your customized service.
Port Number Type a single port number or the range of port numbers that define your customized
servic
e.
Back Click this to return to the previous screen without saving.
Apply Click this to save your changes.
Cancel Click this to exit this screen without saving.
Table 64 Security > Firewall > Rules: Edit: Edit Customized Services: Add/Edit (continued)
LABEL DESCRIPTION