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CNet Technology Inc.
www.CNet.com.tw
Item
Description
Virtual Circuit
Enter Virtual Circuit Index that you plan to setup for the NAT function
NAT Status
This field shows the current status of the NAT function for the current VC.
Number of IPs
This field is to specify how many IPs are provided by your ISP for current VC. It
can be single IP or multiple IPs.
Note: for VCs with single IP, they share the same DMZ and Virtual servers; for
VCs with multiple IPs, each VC can set DMZ and Virtual servers. Furthermore,
for VCs with multiple IPs, they can define the Address Mapping rules; for VCs
with single IP, since they have only one IP, there is no need to individually
define the Address Mapping rule.
a.
DMZ
A DMZ (demilitarized zone) is a host between a private local network and the outside public
network. It prevents outside users from getting direct access to a server that has company
data. Users of the public network outside the company can access only the DMZ host.
Item
Description
DMZ Host IP
Address
Enter the specified IP Address for DMZ host on the LAN side.
b.
Virtual Server
The Virtual Server is the server or server(s) behind NAT (on the LAN), for example, Web
server or FTP server, that you can make visible to the outside world even though NAT makes
your whole inside network appear as a single machine to the outside world.
Item
Description
Rule Index
The Virtual server rule index for this VC. You can specify 10 rules in maximum.
All the VCs with single IP will use the same Virtual Server rules.
Start & End port
number
Enter the specific Start and End Port number you want to forward. If it is one
port only, you can enter the End port number the same as Start port number.
For example, you want to set the FTP Virtual server, you can set the start and
end port number to 21.
Local IP Address
Enter the IP Address for the Virtual Server in LAN side.
c.
IP Address Mapping
The IP Address Mapping is for those VCs that with multiple IPs. The IP Address Mapping rule
is per-VC based. (Only for Multiple IPs' VCs).
Item
Description
Rule Index
The Virtual server rule index for this VC. You can specify 10 rules in maximum.
All the VCs with single IP will use the same Virtual Server rules.
Rule Type
There are four types of one-to-one, Many-to-One, Many-to-Many Overload and
Many-to-Many No-overload.
Local Start & End
IP
Enter the local IP Address you plan to mapped to. Local Start IP is the starting
local IP address and Local End IP is the ending local IP address. If the rule is for
all local IPs, then the Start IP is 0.0.0.0 and the End IP is 255.255.255.255.
Public Start &
End IP
Enter the public IP Address you want to do NAT. Public Start IP is the starting
public IP address and Public End IP is the ending public IP address. If you have a
dynamic IP, enter 0.0.0.0 as the Public Start IP.
