ZyXEL Communications 5 Series ユーザーズマニュアル

Chapter 9 WAN Screens

ZyWALL 5/35/70 Series User’s Guide

Idle Timeout

This value specifies the time in seconds that elapses before the ZyWALL 
automatically disconnects from the ISP.

WAN IP Address 
Assignment 

Get automatically 
from ISP 

Select this option If your ISP did not assign you a fixed IP address. This is the 
default selection. 

Use Fixed IP 
Address

Select this option If the ISP assigned a fixed IP address. 

My WAN IP 
Address

Enter your WAN IP address in this field if you selected Use Fixed IP Address. 

Advanced Setup

Enable NAT 
(Network 
Address 
Translation)

Network Address Translation (NAT) allows the translation of an Internet protocol 
address used within one network (for example a private IP address used in a local 
network) to a different IP address known within another network (for example a 
public IP address used on the Internet). 
Select this checkbox to enable NAT.
For more information about NAT see 

.

Enable Multicast

Select this check box to turn on IGMP (Internet Group Management Protocol). 
IGMP is a network-layer protocol used to establish membership in a Multicast 
group - it is not used to carry user data.

Multicast Version

Choose None (default), IGMP-V1 or IGMP-V2. IGMP (Internet Group Management 
Protocol) is a session-layer protocol used to establish membership in a Multicast 
group – it is not used to carry user data. IGMP version 2 (RFC 2236) is an 
improvement over version 1 (RFC 1112) but IGMP version 1 is still in wide use. If 
you would like to read more detailed information about inter-operability between 
IGMP version 2 and version 1, please see sections 4 and 5 of RFC 2236.

Enable Budget 
Control 

Select this check box to set a monthly limit for the user account of the installed 3G 
card. You must insert a 3G card before you enable budget control on the ZyWALL.
You can set a limit on the total traffic and/or call time. The ZyWALL takes the 
actions you specified when a limit is exceeded during the month.

Time Budget

Select this check box and specify the amount of time (in hours) that the 3G 
connection can be used within one month.
If you change the value after you configure and enable budget control, the ZyWALL 
resets the statistics.

Data Budget

Select this check box and specify how much downstream and/or upstream data (in 
Mega bytes) can be transmitted via the 3G connection within one month.
Select Download to set a limit on the downstream traffic (from the ISP to the 
ZyWALL).
Select Upload to set a limit on the upstream traffic (from the ZyWALL to the ISP).
Select Download/Upload to set a limit on the total traffic in both directions.
If you change the value after you configure and enable budget control, the ZyWALL 
resets the statistics.

Reset time and 
data budget 
counters on

Select the date on which the ZyWALL resets the budget every month. If the date 
you selected is not available in a month, such as 30th or 31th, the ZyWALL resets 
the budget on the last day of the month.

Reset time and 
data budget 
counters

This button is available only when you enable budget control in this screen.
Click this button to reset the time and data budgets immediately. The count starts 
over with the 3G connection’s full configured monthly time and data budgets. This 
does not affect the normal monthly budget restart.

Table 45   NETWORK > WAN > 3G (WAN 2) (continued)