Juniper IP SERVICES - CONFIGURATION GUIDE V 11.1.X, Configuration Manual

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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.
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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
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Example 1—Simple address translation
host (config) # ip nat inside source static 10.1.2.3 171.69.68.10
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Example 2—Extended address/port translation
host (config) # ip nat inside source static tcp 10.1.2.3 15 171.69.68.10 30
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Use the no version to remove the static translation and purge the associated
translations from the translation table.
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See ip nat inside source static.
Creating Static Outside Source Translations
Less commonly used, outside source translation enables you to set up translation
between two non-unique or not publicly routable networks (for example, two separate
networks that use overlapping IP address blocks).
ip nat outside source static
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Use to translate the source address when routing a packet from the outside
network to the inside network, and to
untranslate the destination address when
a packet travels from the inside network to the outside network.
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Creates a simple (IP address only) or extended (IP address, protocol, and port)
entry in the translation table that maps the two addresses.
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A static translation created with the ip nat outside source static command
enables any inside host to contact the outside host by using the outside local
address of the outside host. A static translation can be used by traffic that is
initiated in either direction.
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Example 1—Simple address translation
host (config) # ip nat outside source static 171.69.68.10 10.1.2.3
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Example 2—Extended address/port translation
host (config) # ip nat outside source static tcp 171.69.68.10 56 10.1.2.3 24
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Use the no version to remove the static translation and purge the associated
translations from the translation table.
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See ip nat outside source static.
Defining Static Address Translations
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Chapter 2: Configuring NAT