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ZyXEL LTE3316 Series Manual

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Chapter 12 Firewall
LTE Series User’s Guide
144
12.6 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 112 Security > Firewall > DoS
The following table describes the labels in this screen.
12.7 Firewall Technical Reference
This section provides some technical background information about the topics covered in this chapter.
Protocol Select the protocol (ALL, TCP/UDP, TCP, UDP, ICMP, ICMPv6) used to transport the packets
for which you want to apply the rule.
Custom Source Port This is a single port number or the starting port number of a range that defines your rule.
Custom Destination
Port
This is a single port number or the ending port number of a range that defines your rule.
Policy 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.
Direction 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.
OK Click this to save your changes.
Cancel Click this to exit this screen without saving.
Table 59 Security > Firewall > Access Control > Add New ACL Rule (continued)
LABEL DESCRIPTION
Table 60 Security > Firewall > DoS
LABEL DESCRIPTION
DoS Protection
Blocking
Enable this to protect against DoS attacks. The Zyxel Device will drop sessions that surpass
maximum thresholds.
Apply Click this to save your changes.
Cancel Click this to restore your previously saved settings.
… 144 …


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