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Configuring Network Address Translation

305753-A Rev 00

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How NAT Works

In the example that follows, company A uses NAT to obtain global Internet access

for its hosts. Hosts on company A’s network need access to resources in company

B’s network. Company B is located in a different network on the Internet. Its

addresses are registered. NAT is configured on the router bordering company A’s

network and the global network. NAT enables communication between the

networks of company A and company B without requiring either company to

restructure its existing network.

The network administrator at company A configures NAT to detect the following

ranges of unregistered local addresses:

• 10.0.0.0 through 10.255.255.255

• 15.0.0.0 through 15.255.255.255

• 50.1.1.0 through 50.1.1.255

The network administrator also configures the following ranges of registered

global addresses:

• 192.55.10.0 through 192.55.10.255

• 192.20.10.0 through 192.20.10.255

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Avaya Configuring BFE Services Manuale Utente Pagina 47