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6 - 56 WiNG 4.4 Switch System Reference Guide
6.5 Configuring NAT Information
Network Address Translation NAT provides the translation of an Internet Protocol (IP) address within one network to a
different, known IP address within another network. One network is designated as the private network, while the other is
public. NAT provides a layer of security by translating private (local) network addresses to one or more public IP addresses.
For example, when an administrator wants to allow individuals on the WAN side access to a particular FTP or Web server
located on one of the LAN subnets but does not want to permit any other access, NAT is the appropriate solution.
Using NAT, a user can mark one or more interfaces as inside or outside. When a user creates a NAT rule for inside or
outside application, it is applied on all the interfaces marked as inside or outside respectively. NAT operates on the switch
to connect two networks together. An inside network is assigned addresses requiring conversion into valid addresses
before packets can be forwarded to an outside network. The translation process operates in parallel with packet routing.
NAT enables network administrators to move a Web or FTP Server to another host without having to troubleshoot broken
links. Change the inbound mapping with the new inside local address to reflect the new host. Configure changes to your
internal network seemlessly since the only external IP address either belongs to the switch or from a pool of global
addresses.
The switch NAT configuration process is divided into the following configuration activities:
•
Defining Dynamic NAT Translations
•
Defining Static NAT Translations
•
Configuring NAT Interfaces
•
Viewing NAT Status
6.5.1 Defining Dynamic NAT Translations
Dynamic NAT translates the IP address of packets going out from one interface to another interface based on the
conditions configured in the list. Dynamic NAT requires packets to be switched through the NAT router to generate
translations in the switch translation table.
Refer to the NAT screen's
To view and add/edit a dynamic NAT configuration:
1. Select
Security
2. Click on the
Dynamic Translation
Dynamic Translation
>
NAT
from the main menu tree.
tab.
tab to view existing dynamic NAT configurations available to switch.
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Troubleshooting
