Chapter 12 Firewall
PMG2006-T20A User’s Guide
101
12.5 The DoS Screen
DoS (Denial of Service) attacks can flood your Internet connection with invalid packets and connection
requests, using so much bandwidth and so many resources that Internet access becomes unavailable.
Use the
DoS
screen to activate protection against DoS attacks. Click
Security > Firewall > DoS
to display
the following screen.
Figure 66
Security > Firewall > DoS
The following table describes the labels in this screen.
Policy
Use the drop-down list box to select whether to discard (
DROP
), deny and send an ICMP
destination-unreachable message to the sender of (
REJECT
) or allow the passage of (
ACCEPT
)
packets that match this rule.
Direction
Use the drop-down list box to select the direction of traffic to which this rule applies.
Enable Rate
Limit
Select this check box to set a limit on the upstream/downstream transmission rate for the
specified protocol.
Specify how many packets per minute or second the transmission rate is.
Scheduler Rules
Select a schedule rule for this ACL rule form the drop-down list box. You can configure a new
schedule rule by click
Add New Rule
. This will bring you to the
Security > Scheduler Rules
screen.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving.
Table 47 Access Control: Add/Edit (continued)
LABEL
DESCRIPTION
Table 48 Security > Firewall > DoS
LABEL
DESCRIPTION
DoS Protection
Blocking
Select
Enable
to enable protection against DoS attacks.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving.
