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Page 676 / 944 Scroll up to view Page 671 - 675
Chapter 45 System
ZyWALL USG 50 User’s Guide
676
•
Vantage CNM (Centralized Network Management) is a browser-based global
management tool that allows an administrator to manage ZyXEL devices. Use
the
System > Vantage CNM
screen (see
Section 45.11 on page 719
) to allow
your ZyWALL to be managed by the Vantage CNM server.
•
Use the
System > Language
screen (see
Section 45.12 on page 722
) to set a
language for the ZyWALL’s Web Configurator screens.
Note: See each section for related background information and term definitions.
45.2
Host Name
A host name is the unique name by which a device is known on a network. Click
Configuration > System > Host Name
to open the
Host Name
screen.
Figure 382
Configuration > System > Host Name
The following table describes the labels in this screen.
45.3
Date and Time
For effective scheduling and logging, the ZyWALL system time must be accurate.
The ZyWALL’s Real Time Chip (RTC) keeps track of the time and date. There is also
Table 209
Configuration > System > Host Name
LABEL
DESCRIPTION
System Name
Choose a descriptive name to identify your ZyWALL device. This name
can be up to 64 alphanumeric characters long. Spaces are not allowed,
but dashes (-) underscores (_) and periods (.) are accepted.
Domain Name
Enter the domain name (if you know it) here. This name is propagated to
DHCP clients connected to interfaces with the DHCP server enabled. This
name can be up to 254 alphanumeric characters long. Spaces are not
allowed, but dashes “-” are accepted.
Apply
Click
Apply
to save your changes back to the ZyWALL.
Reset
Click
Reset
to return the screen to its last-saved settings.
Page 677 / 944
Chapter 45 System
ZyWALL USG 50 User’s Guide
677
a software mechanism to set the time manually or get the current time and date
from an external server.
To change your ZyWALL’s time based on your local time zone and date, click
Configuration > System > Date/Time
. The screen displays as shown. You can
manually set the ZyWALL’s time and date or have the ZyWALL get the date and
time from a time server.
Figure 383
Configuration > System > Date and Time
The following table describes the labels in this screen.
Table 210
Configuration > System > Date and Time
LABEL
DESCRIPTION
Current Time and
Date
Current Time
This field displays the present time of your ZyWALL.
Current Date
This field displays the present date of your ZyWALL.
Time and Date
Setup
Manual
Select this radio button to enter the time and date manually. If you
configure a new time and date, time zone and daylight saving at the
same time, the time zone and daylight saving will affect the new time
and date you entered. When you enter the time settings manually, the
ZyWALL uses the new setting once you click
Apply
.
Page 678 / 944
Chapter 45 System
ZyWALL USG 50 User’s Guide
678
New Time (hh-
mm-ss)
This field displays the last updated time from the time server or the
last time configured manually.
When you set
Time and Date Setup
to
Manual
, enter the new time
in this field and then click
Apply
.
New Date
(yyyy-mm-dd)
This field displays the last updated date from the time server or the
last date configured manually.
When you set
Time and Date Setup
to
Manual
, enter the new date
in this field and then click
Apply
.
Get from Time
Server
Select this radio button to have the ZyWALL get the time and date
from the time server you specify below. The ZyWALL requests time
and date settings from the time server under the following
circumstances.
•
When the ZyWALL starts up.
•
When you click
Apply
or
Synchronize Now
in this screen.
•
24-hour intervals after starting up.
Time Server
Address
Enter the IP address or URL of your time server. Check with your ISP/
network administrator if you are unsure of this information.
Sync. Now
Click this button to have the ZyWALL get the time and date from a
time server (see the
Time Server Address
field). This also saves
your changes (except the daylight saving settings).
Time Zone Setup
Time Zone
Choose the time zone of your location. This will set the time difference
between your time zone and Greenwich Mean Time (GMT).
Enable Daylight
Saving
Daylight saving is a period from late spring to early fall when many
countries set their clocks ahead of normal local time by one hour to
give more daytime light in the evening.
Select this option if you use Daylight Saving Time.
Start Date
Configure the day and time when Daylight Saving Time starts if you
selected
Enable Daylight Saving
. The
at
field uses the 24 hour
format. Here are a couple of examples:
Daylight Saving Time starts in most parts of the United States on the
second Sunday of March. Each time zone in the United States starts
using Daylight Saving Time at 2 A.M. local time. So in the United
States you would select
Second
,
Sunday
,
March
and type 2 in the
at
field.
Daylight Saving Time starts in the European Union on the last Sunday
of March. All of the time zones in the European Union start using
Daylight Saving Time at the same moment (1 A.M. GMT or UTC). So in
the European Union you would select
Last
,
Sunday
,
March
. The time
you type in the
at
field depends on your time zone. In Germany for
instance, you would type 2 because Germany's time zone is one hour
ahead of GMT or UTC (GMT+1).
Table 210
Configuration > System > Date and Time (continued)
LABEL
DESCRIPTION
Page 679 / 944
Chapter 45 System
ZyWALL USG 50 User’s Guide
679
45.3.1
Pre-defined NTP Time Servers List
When you turn on the ZyWALL for the first time, the date and time start at 2003-
01-01 00:00:00. The ZyWALL then attempts to synchronize with one of the
following pre-defined list of Network Time Protocol (NTP) time servers.
The ZyWALL continues to use the following pre-defined list of NTP time servers if
you do not specify a time server or it cannot synchronize with the time server you
specified.
When the ZyWALL uses the pre-defined list of NTP time servers, it randomly
selects one server and tries to synchronize with it. If the synchronization fails,
then the ZyWALL goes through the rest of the list in order from the first one tried
until either it is successful or all the pre-defined NTP time servers have been tried.
End Date
Configure the day and time when Daylight Saving Time ends if you
selected
Enable Daylight Saving
. The
at
field uses the 24 hour
format. Here are a couple of examples:
Daylight Saving Time ends in the United States on the first Sunday of
November. Each time zone in the United States stops using Daylight
Saving Time at 2 A.M. local time. So in the United States you would
select
First
,
Sunday
,
November
and type 2 in the
at
field.
Daylight Saving Time ends in the European Union on the last Sunday
of October. All of the time zones in the European Union stop using
Daylight Saving Time at the same moment (1 A.M. GMT or UTC). So in
the European Union you would select
Last
,
Sunday
,
October
. The
time you type in the
at
field depends on your time zone. In Germany
for instance, you would type 2 because Germany's time zone is one
hour ahead of GMT or UTC (GMT+1).
Offset
Specify how much the clock changes when daylight saving begins and
ends.
Enter a number from 1 to 5.5 (by 0.5 increments).
For example, if you set this field to 3.5, a log occurred at 6 P.M. in local
official time will appear as if it had occurred at 10:30 P.M.
Apply
Click
Apply
to save your changes back to the ZyWALL.
Reset
Click
Reset
to return the screen to its last-saved settings.
Table 210
Configuration > System > Date and Time (continued)
LABEL
DESCRIPTION
Table 211
Default Time Servers
0.pool.ntp.org
1.pool.ntp.org
2.pool.ntp.org
Page 680 / 944
Chapter 45 System
ZyWALL USG 50 User’s Guide
680
45.3.2
Time Server Synchronization
Click the
Synchronize Now
button to get the time and date from the time server
you specified in the
Time Server Address
field.
When the
Please Wait...
screen appears, you may have to wait up to one minute.
Figure 384
Synchronization in Process
The
Current Time
and
Current Date
fields will display the appropriate settings if
the synchronization is successful.
If the synchronization was not successful, a log displays in the
View Log
screen.
Try re-configuring the
Date/Time
screen.
To manually set the ZyWALL date and time.
1
Click
System > Date/Time
.
2
Select
Manual
under
Time and Date Setup
.
3
Enter the ZyWALL’s time in the
New Time
field.
4
Enter the ZyWALL’s date in the
New Date
field.
5
Under
Time Zone Setup
, select your
Time Zone
from the list.
6
As an option you can select the
Enable Daylight Saving
check box to adjust the
ZyWALL clock for daylight savings.
7
Click
Apply
.
To get the ZyWALL date and time from a time server
1
Click
System > Date/Time
.
2
Select
Get from Time Server
under
Time and Date Setup
.
3
Under
Time Zone Setup
, select your
Time Zone
from the list.
4
As an option you can select the
Enable Daylight Saving
check box to adjust the
ZyWALL clock for daylight savings.

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