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Chapter 12 Firewall Screens
ZyWALL 2WG User’s Guide
257
12.8.1 The Firewall Edit Custom Service Screen
Click
SECURITY > FIREWALL
>
Service
>
Add
to display the following screen. Use this
screen to configure a custom service entry not is not predefined in the ZyWALL. See
for a list of commonly used services and port numbers.
Figure 158
Firewall Edit Custom Service
The following table describes the labels in this screen.
Modify
Click the edit icon to go to the screen where you can edit the service.
Click the delete icon to remove an existing service. A window displays asking you
to confirm that you want to delete the service. Note that subsequent services
move up by one when you take this action.
Add
Click this button to bring up the screen that you use to configure a new custom
service that is not in the predefined list of services.
Predefined
Service
This table shows all the services that are already configured for use in firewall
rules. See
for a list of common services.
#
This is the index number of the predefined service.
Service Name
This is the name of the service.
Protocol
This is the IP protocol type. There may be more than one IP protocol type.
Attribute
This is the IP port number or ICMP type and code that defines the service.
Table 74
SECURITY > FIREWALL > Service (continued)
LABEL
DESCRIPTION
Table 75
SECURITY > FIREWALL > Service > Add
LABEL
DESCRIPTION
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.