Creating Static Inside Source Translations

You use the ip nat inside source static command to create static translations from a local IP address to a global IP address, and to untranslate the destination address when a packet returns from the outside network to the inside network. When you configure traditional NAT (both basic NAT and NAPT), you only need to use this command alone. However, when you configure twice NAT, you must also use the ip nat outside source static command.

The ip nat inside source static command creates a simple (IP address only) or extended (IP address, port, and protocol) entry in the translation table that maps the two addresses.

ip nat inside source static

• Use to create static translations for a source address (or address/port pair) when routing a packet from the inside network to the outside network, and to untranslate the destination address (or address/port pair) when a packet returns from the outside network to the inside network.
• A static translation created with the ip nat inside source static command enables any outside host to contact the inside host by using the inside global address of the inside host. A static translation can be used by traffic that is initiated in either direction
• Example 1—Simple address translation

  host (config) # ip nat inside source static 10.1.2.3 171.69.68.10

• Example 2—Extended address/port translation

  host (config) # ip nat inside source static tcp 10.1.2.3 15 171.69.68.10 30

• Use the no version to remove the static translation and purge the associated translations from the translation table.
• See ip nat inside source static.

Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice.