ZyXEL Communications P-334 - Manual (Page 132)

Prestige 334 User’s Guide
131 Chapter 11 Firewall
Figure 46 Firewall: Service
The following table describes the labels in this screen.
Table 36 Firewall: Service
LABEL DESCRIPTION
Enable Services
Blocking
Select this check box to enable this feature.
Available Service This is a list of pre-defined services (ports) you may prohibit your LAN
computers from using. Select the port you want to block using the drop-down list
and click Add to add the port to the Blocked Service field.
Blocked Service This is a list of services (ports) that will be inaccessible to computers on your
LAN once you enable service blocking. Choose the IP port (TCP, UDP or TCP/
UDP) that defines your customized port from the drop down list box.
Custom Port A custom port is a service that is not available in the pre-defined Available
Services list and you must define using the next two fields.
Type Services are either TCP and/or UDP. Select from either TCP or UDP.
Port Number Enter the port number range that defines the service. For example, suppose you
want to define the Gnutella service. Select TCP type and enter a port range from
6345-6349.
Add Select a service from the Available Services drop-down list and then click Add
to add a service to the Blocked Service.
Delete Select a service from the Blocked Services List and then click Delete to
remove this service from the list.