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Page 96 / 428 Scroll up to view Page 91 - 95
Configuring Network Settings
82
Check Point ZoneAlarm User Guide
The
My Network
page appears.
2.
Click
Edit
in the LAN network’s row.
The
Edit Network Settings
page for the LAN network appears.
3.
In the
Mode
drop-down list, select
Enabled
.
Page 97 / 428
Configuring Network Settings
Chapter 6: Managing Your Network
83
The fields are enabled.
4.
If desired, change your ZoneAlarm router’s internal IP address.
See
Changing IP Addresses
on page 83.
5.
If desired, enable or disable Hide NAT.
See
Enabling/Disabling Hide NAT
on page 85.
6.
If desired, configure a DHCP server.
See
Configuring a DHCP Server
on page 86.
7.
Click
Apply
.
A warning message appears.
8.
Click
OK
.
A success message appears.
Changing IP Addresses
If desired, you can change your ZoneAlarm router’s internal IP address, or the entire range
of IP addresses in your internal network.
To change IP addresses
1.
Click
Network
in the main menu, and click the
My Network
tab.
The
My Network
page appears.
2.
In the desired network's row, click
Edit
.
The
Edit Network Settings
page appears.
3.
To change the ZoneAlarm router’s internal IP address, enter the new IP
address in the
IP Address
field.
4.
To change the internal network range, enter a new value in the
Subnet Mask
field.
Page 98 / 428
Configuring Network Settings
84
Check Point ZoneAlarm User Guide
Note:
The internal network range is defined both by the ZoneAlarm router’s internal
IP address and by the subnet mask.
For example, if the ZoneAlarm router’s internal IP address is 192.168.100.7, and
you set the subnet mask to 255.255.255.0, the network’s IP address range will be
192.168.100.1 – 192.168.100.254.
5.
Click
Apply
.
A warning message appears.
6.
Click
OK
.
•
The ZoneAlarm router's internal IP address and/or the internal network range
are changed.
•
A success message appears.
7.
Do
one
of the following
:
•
If your computer is configured to obtain its IP address automatically
(using DHCP), and the ZoneAlarm DHCP server is enabled, restart your
computer.
Your computer obtains an IP address in the new range.
•
Otherwise, manually reconfigure your computer to use the new
address range using the TCP/IP settings. For information on configuring
TCP/IP, see
TCP/IP Settings
on page 28.
Page 99 / 428
Configuring Network Settings
Chapter 6: Managing Your Network
85
Enabling/Disabling Hide NAT
Hide Network Address Translation (Hide NAT) enables you to share a single public
Internet IP address among several computers, by “hiding” the private IP addresses of the
internal computers behind the ZoneAlarm router’s single Internet IP address.
Note:
If Hide NAT is disabled, you must obtain a range of Internet IP addresses
from your ISP. Hide NAT is enabled by default.
Note:
Static NAT and Hide NAT can be used together.
To enable/disable Hide NAT
1.
Click
Network
in the main menu, and click the
My Network
tab.
The
My Network
page appears.
2.
In the desired network's row, click
Edit
.
The
Edit Network Settings
page appears.
3.
From the
Hide
NAT
list, select
Enabled
or
Disabled
.
4.
Click
Apply
.
A warning message appears.
5.
Click
OK
.
•
If you chose to disable Hide NAT, it is disabled.
•
If you chose to enable Hide NAT, it is enabled.
Page 100 / 428
Configuring Network Settings
86
Check Point ZoneAlarm User Guide
Configuring a DHCP Server
By default, the ZoneAlarm router operates as a DHCP (Dynamic Host Configuration
Protocol) server. This allows the ZoneAlarm router to automatically configure all the
devices on your network with their network configuration details.
Note:
The DHCP server only serves computers that are configured to obtain an IP
address automatically. If a computer is not configured to obtain an IP address
automatically, it is recommended to assign it an IP address outside of the DHCP
address range. However, if you do assign the computer an IP address within the
DHCP address range, the DHCP server will detect this and will not assign this IP
address to another computer.
If you already have a DHCP server in your internal network, and you want to use it instead
of the ZoneAlarm DHCP server, you must disable the ZoneAlarm DHCP server, since you
cannot have two DHCP servers or relays on the same network segment.
If you want to use a DHCP server on the Internet or via a VPN, instead of the ZoneAlarm
DHCP server, you can configure DHCP relay. When in DHCP relay mode, the ZoneAlarm
router relays information from the desired DHCP server to the devices on your network.
Note:
You can perform DHCP reservation using network objects. For information,
see
Using Network Objects
on page 95.
Enabling/Disabling the ZoneAlarm DHCP Server
You can enable and disable the ZoneAlarm DHCP Server for internal networks.
To enable/disable the ZoneAlarm DHCP server
1.
Click
Network
in the main menu, and click the
My Network
tab.
The
My Network
page appears.
2.
In the desired network's row, click
Edit
.
The
Edit Network Settings
page appears.
3.
From the
DHCP Server
list, select
Enabled
or
Disabled
.
4.
Click
Apply
.

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