Dos - ZyXEL Communications LTE Series User Manual

Table 38 Security > Firewall > Access Control > Add New ACL Rule (continued)
LABEL
Custom Source Port
Custom Destination
Port
Policy
Direction
Enable Rate Limit
Scheduler Rules
packet(s) per
(1-512)
Add New Rule
Cancel
OK

10.6 DoS

Activate protection against DoS attacks. 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.
Click Security > Firewall > DoS to display the following screen.
Figure 77 Security > Firewall > DoS
The following table describes the labels in this screen.
Table 39 Security > Firewall > DoS
LABEL
DoS Protection
Blocking
Cancel
Apply
Chapter 10 Firewall
DESCRIPTION
This is a single port number or the starting port number of a range that defines your rule.
This is a single port number or the ending port number of a range that defines your rule.
Use the drop-down list box to select whether to discard (Drop), deny and send an ICMP
destination-unreachable message to the sender (Reject), or allow the passage of
(Accept) packets that match this rule.
Select WAN to LAN to apply the rule to traffic from WAN to LAN. Select LAN to WAN to
apply the rule to traffic from LAN to WAN. Select WAN to Router to apply the rule to traffic
from WAN to router. Select LAN to Router to apply the rule to traffic from LAN to router.
Click to enable (switch turns blue) the setting of maximum number of packets per
maximum number of minute/second to limit the throughput of traffic that matches this
rule. If not, the next item will be disabled.
Enter the maximum number of packets (1-512) per minute/second.
Select a schedule rule for this ACL rule form the drop-down list box. You can configure a
new schedule rule by clicking Add New Rule.
Click this to exit this screen without saving any changes.
Click this to save your changes.
DESCRIPTION
Enable this to protect against DoS attacks. The Zyxel Device will drop sessions that surpass
maximum thresholds.
Click this to restore your previously saved settings.
Click this to save your changes.
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