ZyXEL Communications NBG-419N Manual Do Utilizador

Chapter 20 Firewall

NBG-419N v2 User’s Guide

See 

 for commonly used services and port numbers.

Enable Firewall Rule

Enable Firewall 
Rule

Select this check box to activate the firewall rules that you define (see Add Firewall Rule 
below)

Apply

Click Apply to save the settings. 

Add Firewall Rule

Service Name

Enter a name that identifies or describes the firewall rule.

MAC Address

Enter the MAC address of the computer for which the firewall rule applies.

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

entering.  

The Router 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 Router 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. 

Security > Firewall > Services (continued)