ZyXEL NBG-419N Guia Do Utilizador

 Chapter 19 Firewall

NBG-419N User’s Guide

 for commonly used services and port numbers.

Dest IP Address Enter the IP address of the computer to which traffic for the application 

or service is entering.  

The NBG-419N applies the firewall rule to traffic initiating from this 
computer.  

Source IP 
Address

Enter the IP address of the computer that initializes traffic for the 
application or service. 

The NBG-419N applies the firewall rule to traffic initiating from this 
computer. 

Protocol

Select the protocol (TCP, UDP, ICMP or None) used to transport the 
packets for which you want to apply the firewall rule. 

Dest Port Range Enter the port number/range of the destination that define the traffic 

type, for example TCP port 80 defines web traffic.

Source Port 
Range

Enter the port number/range of the source that define the traffic type, 
for example TCP port 80 defines web traffic.

Add Rule

Click Add to save the firewall rule. 

Firewall Rule
#

This is your firewall rule number. The ordering of your rules is important 
as rules are applied in turn. 

Service Name

This is a name that identifies or describes the firewall rule.

MAC Address

This is the MAC address of the computer for which the firewall rule 
applies.

Dest IP Address This is the IP address of the computer to which traffic for the application 

or service is entering. 

Source IP 
Address

This is the IP address of the computer from which traffic for the 
application or service is initialized. 

Protocol

This is the protocol (TCP, UDP, ICMP or None) used to transport the 
packets for which you want to apply the firewall rule. 

Dest Port Range This is the port number/range of the destination that define the traffic 

type, for example TCP port 80 defines web traffic.

Source Port 
Range

This is the port number/range of the source that define the traffic type, 
for example TCP port 80 defines web traffic.

Action

Drop - Traffic matching the conditions of the firewall rule are stopped.

Delete

Click this to remove the firewall rule.

Reset

Click Reset to start configuring this screen again. 

Table 64   Security > Firewall > Services