Avaya 1600 manual NAT configuration

9. NAT configuration

This chapter walks you through the steps required to configure the Network Address Translation (NAT). For more information on the menus, submenus and commands in this chapter, see the “Menu interface” chapter.

The setup of IP networks can be difficult and time consuming, as each requires an IP address, subnet mask, DNS address and a default router.

If you enter once piece of information incorrectly, the network connection does not function and there may be no indication of what is wrong.

NAT prevents this scenario by:

Modifying IP addresses and checksum without impacting traffic.

Automatic network configuration - if you configure DHCP. For more information, see the “DHCP configuration” chapter.

Packet level filtering and routing.

Traffic logging.

A significant advantage of NAT lies in the fact that you can configure it without having to change host or routers – other than those few routers on which NAT is configured.

NAT multiplexes traffic from the internal network and presents it to the Internet as if it is from a single source that has only one IP address.

You must complete the following steps to configure NAT:

Enable NAT translation by port (factory default = disabled)

Configure the NAT local server entry

Configure the NAT Transmission Control Protocol

(TCP) or User Datagram Protocol (UDP) timeouts Configure the NAT port range

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