ZyXEL Communications Corporation P873HNUP51B Manuel D’Utilisation

Chapter 15 Firewall

P-873HNUP-51B User’s Guide

Click Security Settings > Firewall > Access Control to display the following screen. This screen 
displays a list of the configured incoming or outgoing filtering rules. 

Figure 93   Security Settings > Firewall > Access Control 

The following table describes the labels in this screen. 

Service 
Description

Enter a description for your customized port.

Apply

Click Apply to save your changes.

Cancel

Click Cancel to exit this screen without saving.

Table 69   Security Settings > Firewall > Protocol > Add (continued)

Table 70   Security Settings > 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. 

State

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

Deny Ping 
Response

You can block ping request packets by enabling this function.

State

Select the Enable check box to block ping packets.

Add New ACL 
Rule

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

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.

Protocol

This displays the transport layer protocol that defines the service to which this 
rule applies.