Perle Systems 1700 manual Network Address Translation and Port Translation

Applications





Network Address Translation and Port Translation

The P1705 & P1730 provide support for Network Address Translation (NAT). Network Address Translation is a technique that translates private IP address on a private network to valid global IP addresses for access to the Internet. Network Address Port Translation (NAPT) translates both the IP address and the port number. The advantage of port translation is that more than one private IP address can be translated to the same global IP address. Port translation allows data exchanges initiated from hosts with private IP addresses to be sent to the Internet via the router using a single global IP address. A global IP address must be assigned to the WAN link upon which NAPT is enabled for port translation to work. The global IP address will be assigned by the ISP.

To use NAPT, the private network addresses of the services that will be available globally must be assigned:

NAT Exports

Location: Main

ªConfiguration

ªApplications Set-up

ªNAT Exports

ªEdit Services

ªenter the private network IP address of each service offered

Then NAT (Network Address Translation) is enabled:

NAT Enable

Location: Main

ªConfiguration

ªWAN Set-up

ªRemote Site Set-up

ªEdit Remote Site

ªProtocol Set-up

ªIP Parameters

ªNAT Enabled Enabled

Configuration: When running frame relay RAW 1490, the local IP address and peer router IP Note address must be set in the IP parameters menu.

52