ZyWALL User's Guide

Chapter 11 Firewall
ZyWALL 2 Plus User’s Guide
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11.13.1 Firewall Edit Custom Service
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
Appendix D on page 653 the user’s guide appendices for a list of commonly used services and
port numbers.
See Section 11.1 on page 191 for more information about the firewall.
Figure 143 Firewall Edit Custom Service
The following table describes the labels in this screen.
Protocol This is the IP protocol type.
If you selected Custom, this is the IP protocol value you entered.
Attribute This is the IP port number or ICMP type and code that defines the service.
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 Appendix D on page 653 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 54 SECURITY > FIREWALL > Service (continued)
LABEL DESCRIPTION
Table 55 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.