ZyXEL Communications 5 Series User Manual

 Chapter 25 Bandwidth Management Screens

ZyWALL 5/35/70 Series User’s Guide

Enable Bandwidth 
Filter
 

Select Enable Bandwidth Filter to have the ZyWALL use this bandwidth filter 
when it performs bandwidth management. 
You must enter a value in at least one of the following fields (other than the 
Subnet Mask fields which are only available when you enter the destination or 
source IP address).

Service

This field simplifies bandwidth class configuration by allowing you to select a 
predefined application. When you select a predefined application, you do not 
configure the rest of the bandwidth filter fields (other than enabling or disabling 
the filter).
FTP (File Transfer Program) is a program to enable fast transfer of files, 
including large files that may not be possible by e-mail. Select FTP from the 
drop-down list box to configure the bandwidth filter for TCP packets with a port 
21 destination. 
H.323 is a protocol used for multimedia communications over networks, for 
example OpenPhone. Select H.323 from the drop-down list box to configure 
the bandwidth filter for TCP packets with a port 1720 destination.

Note: At the time of writing, bandwidth management only 

supports H.323 applications using the fast connect 
procedure. H.323 applications using the normal connect 
procedure are not applicable to bandwidth management.

Note: If you select H.323, make sure you also use the ALG 

screen to turn on the H.323 ALG. 

SIP (Session Initiation Protocol) is a signaling protocol used in Internet 
telephony, instant messaging, events notification and conferencing. The 
ZyWALL supports SIP traffic pass-through. Select SIP from the drop-down list 
box to configure this bandwidth filter for UDP packets with a port 5060 
destination. This option makes it easier to manage bandwidth for SIP traffic 
and is useful for example when there is a VoIP (Voice over Internet Protocol) 
device on your LAN.

Note: If you select SIP, make sure you also use the ALG screen 

to turn on the SIP ALG.

Select Custom from the drop-down list box if you do not want to use a 
predefined application for the bandwidth class. When you select Custom, you 
need to configure at least one of the following fields (other than the Subnet 
Mask fields which you only enter if you also enter a corresponding destination 
or source IP address).

Destination Address 
Type

Do you want your rule to apply to packets coming going to a particular (single) 
IP, a range of IP addresses (for example 192.168.1.10 to 192.169.1.50) or a 
subnet? Select Single Address, Range Address or Subnet Address.

Destination IP 
Address

Enter the single IP address or the starting IP address in a range here. 

Destination End 
Address / Subnet 
Mask

If you are configuring a range of IP addresses, enter the ending IP address 
here. If you are configuring a subnet of addresses, enter the subnet mask here. 
Refer to 

 for more information on IP subnetting.

Destination Port 

Enter the starting and ending destination port numbers. Enter the same port 
number in both fields to specify a single port number. See 

 for a table of services and port numbers.

Table 146   ADVANCED > BW MGMT > Class Setup > Add Sub-Class (continued)