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2000-A2-GB20-10 - 169 - February 2004
This chapter describes the steps required to configure Network Address
Translation (NAT).
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.
The NAT Local Server may be configured with a range of both TCP and
UDP ports, which benefits applications including video conferencing and
multi-user games.
Setting up IP networks without NAT may be complex—each requires an IP
address, subnet mask, a DNS address and a default router.
NAT reduces this complexity by:
Modifying IP addresses and checksum without affecting traffic
Automatic network configuration when using DHCP
Packet-level filtering and routing
Traffic logging
This chapter contains the following topics:
Using the NAT Configuration menu (page 170)
Enabling and Disabling Enabling NAT Translation (page 171)
Configuring a NAT Local Server (page 172)
Configuring NAT Timeouts (page 173)
Configuring the NAT port range (page 174)
Configuring the NAT Alias Entry (page 175)
DIsplaying NAT Statistics (page 176)
Displaying the NAT Connection Table (page 177)
Displaying NAT Connection Details (page 177)
Displaying the NAT Local Server Table (page 179)
Displaying the NAT Alias Table (page 179)
Deleting an IP Address from NAT Tables (page 179)
Deleting a NAT Local Server Entry (page 180)
Deleting a NAT Alias Entry (page 180)
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NOTE
If you enter an element of NAT information incorrectly, the
network connection will not function and there may be no
indication of what is wrong.