Dos; Firewall Technical Reference - ZyXEL Communications LTE Series User Manual

Table 59 Security > Firewall > Access Control > Add New ACL Rule (continued)
LABEL
Protocol
Custom Source Port
Custom Destination
Port
Policy
Direction
OK
Cancel

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.
Table 60 Security > Firewall > DoS
LABEL
DoS Protection
Blocking
Apply
Cancel

12.7 Firewall Technical Reference

This section provides some technical background information about the topics covered in this chapter.
Chapter 12 Firewall
DESCRIPTION
Select the protocol (ALL, TCP/UDP, TCP, UDP, ICMP, ICMPv6) used to transport the packets
for which you want to apply the rule.
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 this to save your changes.
Click this to exit this screen without saving.
DESCRIPTION
Enable this to protect against DoS attacks. The Zyxel Device will drop sessions that surpass
maximum thresholds.
Click this to save your changes.
Click this to restore your previously saved settings.
LTE Series User's Guide
144