ZyXEL Communications 2 Plus Manual Do Utilizador

 Chapter 11 Firewall

ZyWALL 2 Plus User’s Guide

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 144   My Service Firewall Rule Example: Service 

2 Configure it as follows and click Apply.

Figure 145   My Service Firewall Rule Example: Edit Custom Service 

3 Click Rule Summary. Select WAN and LAN from the Packet Direction drop-down 

list boxes and click Refresh to display existing firewall rules for the selected direction of 
travel of packets.

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.

Table 55   SECURITY > FIREWALL > Service > Add (continued)