Perle Systems IOLINK-520 - Manual (Page 57)

Applications
IOLINK-520 & IOLINK-PRO Installation & Applications Guide — 2.37
2.4.2 - Network Address Translation and Port Translation
The IOLINK-520 & IOLINK-PRO 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 IOLINK 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
!
Configuration
!
Applications Set-up
!
NAT Exports
!
Edit Services
!
enter the private network IP address of
each service offered
Then NAT (Network Address Translation) is enabled:
NAT Enable
Location: Main
!
Configuration
!
WAN Set-up
!
Remote Site Set-up
!
Edit Remote Site
!
Protocol Set-up
!
IP Parameters
!
NAT 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.
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