ZyXEL Communications Corporation IX280P Benutzerhandbuch

Chapter 15 The Firewall Screens

MAX-207HW2R User’s Guide

Available 
Services

This is a list of pre-defined services (destination ports) you may prohibit 
your LAN computers from using. Select the port you want to block, and 
click Add to add the port to the Blocked Services field.

A custom port is a service that is not available in the pre-defined 
Available Services list. You must define it using the Type and Port 
Number fields.

Blocked 
Services

This is a list of services (ports) that are inaccessible to computers on 
your LAN when service blocking is effective. To remove a service from 
this list, select the service, and click Remove.

Type

Select TCP or UDP, based on which one the custom port uses.

Port Number

Enter the range of port numbers that defines the service. For example, 
suppose you want to define the Gnutella service. Select TCP type and 
enter a port range of 6345-6349.

Source IP

You can configure the source addresses to which this firewall rule 
applies. 

Select Single IP from the drop-list to apply the firewall rule to packets 
with a particular (single) IP.

Select Range IP to apply the firewall rule to packets within a range of 
IP addresses. 

If you do not want the firewall rule to apply to any IP address, select 
None. 

Destination IP

You can configure the destination addresses or ranges of addresses to 
which this firewall rule applies. 

Select Single IP from the drop-list to apply the firewall rule to packets 
with a particular (single) IP.

Select Range IP to apply the firewall rule to packets within a range of 
IP addresses.  

If you do not want the firewall rule to apply to any IP address, select 
None. 

Add

Click this to add the selected service in Available Services to the 
Blocked Services list.

Remove

Select a service in the Blocked Services, and click this to remove the 
service from the list.

Schedule to Block
Enable 
Schedule

Select this check box to enable your schedule for blocking.

Day to Block

Select which days of the week you want the service blocking to be 
effective.

Time of Day to 
Block

Select what time each day you want service blocking to be effective. 
Enter times in 24-hour format; for example, 3:00pm should be entered 
as 15:00.

Apply

Click to save your changes.

Reset

Click to restore your previously saved settings.

Table 61   TOOLS > Firewall > Service Setting (continued)