User`s guide

Solwise Asus SL6000 ADSL Ethernet Router User’s Guide Chapter 7. The Configuration Pages in more detail
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understanding the NAT database.
To add a new NAT Pool, choose the Add New option in the drop down list, Enter the NAT
Pool name in the text box; Choose the NAT pool type from the drop down list. Enter the
LAN and Internet IP address values depending on the NAT pool type you choose and finally
click on the Apply button. To view the existing or the configured NAT pools, choose the
NAT pool name in the drop down list. To delete an existing NAT pool, choose the NAT pool
name in the drop down list and click on the Delete Pool button.
Configuration Parameters
Name:
Type the NAT pool name that you would like to add.
Type:
You can select the NAT Pool Type from the drop down list.
Static
: This type of NAT allows one address to be mapped exactly to one computer
in the network. When a packet matches a policy with static NAT record, no port change will occur. The
number of Internet IP addresses should be equal to the number of LAN IP Addresses.
Start IP: Specify the starting IP address in LAN and Internet
End IP: Specify the ending IP address in LAN and Internet
Dynamic:
This type of NAT allows you to map a set of LAN computers to a set of
Internet IP addresses, in a NAT Record. When this record is associated with an outbound policy, the
source IP address of packets will be subjected to NAT and directed to one of the available Internet IP
address. If no Internet IP address is free, the packet will be dropped. As an IP address is assigned to
a single computer at any instant of time, there is no need for port translation.
Start IP: Specify the starting IP address in LAN and Internet
End IP: Specify the ending IP address in LAN and Internet
Overload
: This is also referred to as
NAPT
. This type of NAT record allows you to
use a single Internet IP address to connect multiple LAN machines to Internet. When this NAT record
is associated with a policy, matching packets will be subject to NAT using this Internet IP address. It
also manages port translation.
NAT IP Address: Specify a single NAT IP Address
Interface
: This is similar to
NAPT
(Internet IP). The only difference is that this setting
takes the external interface as the Internet IP address. The IP address of the interface connected to
the Internet will be used as the NAT IP address.
Notes
If the static type NAT record is used in an Internet policy then packets from LAN to Internet with
attributes that match this policy will be subject to NAT such that the source IP address of the packet
gets modified to the corresponding Internet IP address which is a public address. The source IP
address of the packet should fall into the set of LAN IP Addresses.
If the static type NAT record is used in an Internal Service policy then packets from Internet
to LAN with attributes that match this policy will be subject to NAT such that the destination
IP address of the packet gets modified to the corresponding Internet IP address which is a
p
rivate network address. The destination IP address of the
p
acket should fall into the LAN IP