Dos - ZyXEL Communications AX Series User Manual

Table 92 Security > Firewall > Access Control > Add New ACL Rule (continued)
LABEL
MAC Address
IP Type
Select Service
Protocol
Custom Source Port
Custom Destination
Port
Policy
Direction
OK
Cancel

16.6 DoS

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 175 Security > Firewall > DoS
Chapter 16 Firewall
DESCRIPTION
Enter the MAC addresses of the wireless or LAN clients that are allowed access to the
Zyxel Device in these address fields. Enter the MAC addresses in a valid MAC address
format, that is, six hexadecimal character pairs, for example, 12:34:56:78:9a:bc.
Select between IPv4 or IPv6. Compared to IPv4, IPv6 (Internet Protocol version 6), is
designed to enhance IP address size and features. The increase in IPv6 address size to
128 bits (from the 32-bit IPv4 address) allows up to 3.4 x 1038 IP addresses. The Zyxel
Device can use IPv4/IPv6 dual stack to connect to IPv4 and IPv6 networks, and supports
IPv6 rapid deployment (6RD).
Select a service from the Select Service box.
Select the protocol (ALL, TCP/UDP, TCP, UDP, ICMP, or 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.
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