ZyXEL Communications NBG410W3G Series User Manual

Chapter 9 Firewall

NBG410W3G Series User’s Guide

The following table describes the labels in this screen.

The following Internet firewall rule example allows a hypothetical My Service connection 
from the Internet.

1 In the Service screen, click Add to open the Edit Custom Service screen. 

Figure 110   My Service Firewall Rule Example: Service 

2 Configure it as follows and click Apply.

Table 48   SECURITY > FIREWALL > Service > Add

Service Name

Enter a descriptive name of up to 31 printable ASCII characters (except 

Extended ASCII characters) for the custom service. You cannot use the 

“(“character. Spaces are allowed. 

IP Protocol

Choose the IP protocol (TCP, UDP, TCP/UDP, ICMP or Custom) that defines 

your customized service from the drop down list box.
If you select Custom, specify the protocol’s number. For example, ICMP is 1, 

TCP is 6, UDP is 17 and so on.

Port Range

Enter the port number (from 1 to 255) that defines the customized service
To specify one port only, enter the port number in the From field and enter it 

again in the To field.
To specify a span of ports, enter the first port in the From field and enter the last 

port in the To field. 

Type/Code

This field is available only when you select ICMP in the IP Protocol field.
The ICMP messages are identified by their types and in some cases codes. 
Enter the type number in the Type field and select the Code radio button and 

enter the code number if any.

Apply

Click Apply to save your customized settings and exit this screen.

Cancel

Click Cancel to exit this screen without saving.