ZoneAlarm Z100G Router Manual PDF (Setup & Configuration Guide)

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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

.

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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.

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Configuring Network Settings

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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.

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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.

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Configuring Network Settings

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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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