Zyxel-communications P-334 Manual do Utilizador descarregar pdf (Página 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.

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Zyxel-communications P-334 Manual do Utilizador Página 132