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    Introduction to NAT

    Network Address Translation (NAT) is a method for modifying or translating network address information in packet headers. Either or both source and destination addresses in a packet may be translated. NAT can include the translation of port numbers as well as IP addresses.

    NAT is described in RFC 1631 to solve IP (version 4) address depletion problems. Since then, NAT has been found to be a useful tool for firewalls, traffic redirect, load sharing, network migrations, and so on.

    The following types of NAT are supported on Juniper Networks devices:

    • Static NAT
    • Destination NAT
    • Source NAT

    Note: SRX Series devices perform both policy lookup and service lookup based on the translated destination port.

    You can use the NAT Wizard to perform basic NAT configuration. To perform more advanced configuration, use the J-Web interface or the CLI.

    Modified: 2016-07-13