ZyXEL Communications VMG1312-B User Manual

Chapter 15 Firewall

VMG1312-B Series User’s Guide

The following table describes the labels in this screen. 

Security > Firewall > Access Control

DoS Protection

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. 

Select the Enable check box to enable protection against DoS attacks.

Add new ACL 
rule

Click this to go to add a filter rule for incoming or outgoing IP traffic.

#

This is the index number of the entry.

Name

This displays the name of the rule.

Src IP 

This displays the source IP addresses to which this rule applies. Please note that a blank 
source address is equivalent to Any.

Dst IP

This displays the destination IP addresses to which this rule applies. Please note that a 
blank destination address is equivalent to Any.

Service

This displays the transport layer protocol that defines the service and the direction of traffic 
to which this rule applies. 

Action

This field displays whether the rule silently discards packets (DROP), discards packets and 
sends a TCP reset packet or an ICMP destination-unreachable message to the sender 
(REJECT) or allows the passage of packets (ACCEPT).

Modify

Click the Edit icon to edit the rule.

Click the Delete icon to delete an existing rule. Note that subsequent rules move up by one 
when you take this action.

Click the Move To icon to change the order of the rule. Enter the number in the # field.