The Dos Screen - ZyXEL Communications XMG3512-B10A User Manual

Table 83 Access Control: Add/Edit (continued)
L ABEL
Custom Source
Port
Custom
Destination Port
Policy
Direction
Enable Rate
Limit
Scheduler Rules
Apply
Cancel
16.5 T he Do S Sc re e n
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
Do S
the following screen.
Security > Firewall > DoS
Fig ure 112
The following table describes the labels in this screen.
Table 84 Security > Firewall > DoS
L ABEL
DoS Protection
Blocking
Apply
Cancel
Chapter 16 Firewall
DESC RIPT IO N
This field is displayed only when you select
Enter a single port number or the range of port numbers of the source.
This field is displayed only when you select
Enter a single port number or the range of port numbers of the destination.
Use the drop-down list box to select whether to discard (
destination-unreachable message to the sender of (
packets that match this rule.
Use the drop-down list box to select the direction of traffic to which this rule applies.
Select to set a limit on the upstream/downstream transmission rate for the specified
Ena b le
protocol.
Specify how many packets per minute or second the transmission rate is.
Select a schedule rule for this ACL rule form the drop-down list box. You can configure a new
schedule rule by click
Click to save your changes.
Apply
Click to exit this screen without saving.
C a nc e l
screen to activate protection against DoS attacks. Click
DESC RIPT IO N
Select to enable protection against DoS attacks.
Ena b le
Click to save your changes.
Apply
Click to exit this screen without saving.
C a nc e l
XMG3512-B10A User's Guide
Spe c ific Pro to c o l
Spe c ific Pro to c o l
. This will bring you to the
Add Ne w Rule
187
in .
Se le c t Pro to c o l
in .
Se le c t Pro to c o l
), deny and send an ICMP
DRO P
) or allow the passage of (
REJEC T
Se c urity > Sc he dule r Rule s
Se c urity > Fire wa ll > Do S
)
AC C EPT
screen.
to display