Black Box LR5100A-T - Manual (Page 58)

Applications
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Network Address Translation and Port Translation
The router provides 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
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Configuration
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Applications Set-up
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NAT Exports
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Edit Services
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enter the private network IP address of
each service offered
Then NAT (Network Address Translation) is enabled:
NAT Enable
Location: Main
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Configuration
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WAN Set-up
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Remote Site Set-up
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Edit Remote Site
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Protocol Set-up
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IP Parameters
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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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