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45
Setting up One-to-One NAT
The following criteria must be met to be able to use One-to-One
NAT:
■
You must have a static Internet IP address for every computer
on your network plus one for the Gateway itself.
■
The addresses must be in one continuous block in the same
subnet
■
You must have selected
Static IP Address
as your
IP Allocation
Mode
and have given your Gateway the first of the Internet
addresses allocated by your ISP.
Figure 40
One-to-One NAT Screen
To set up One-to-One NAT:
1
Select
One-to-One NAT
from the
NAT Mode
drop-down box.
2
Enter the second address of your Internet range of addresses in
the
First IP Address in ISP Pool
field.
3
Enter the first address in your LAN range of addresses to which
you want to map this range in the
First IP Address in LAN Pool
field.
3Com recommends that you set your DHCP pool to the same as
the range of LAN addresses used as your LAN pool.
4
Enter the number of addresses in the range into the
Pool Size
field.
5
Click
Apply
to save your changes.
Configuring the Firewall
On the main frame of the
Firewall
setup screen is a menu with
four tabs:
Virtual Servers
,
PC Privileges
,
Special Applications
, and
Advanced
. These enable you to set the access to and security of
your network.
The Virtual Servers Menu
Selecting the
Firewall
option on the main menu displays the
Virtual Servers
screen. (
Figure 41
)
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