Configuring Nat Information; Defining Dynamic Nat Translations - Motorola RFS7000 Series System Reference Manual

6.6 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. NAT involves re-writing the source and/or
destination addresses of IP packets as they pass through a router or firewall. Most systems use NAT to enable
multiple hosts on a private network to access the Internet using a single public IP address.
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
6.6.1 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 Dynamic Translation
to switch.
To view and add/edit a dynamic NAT configuration:
1. Select Security >
tab to view existing dynamic NAT configurations available
NAT from the main menu tree.
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Switch Security