Network Address Translation (NAT) is a method by which IP addresses in a packet are mapped from one group to another and, optionally, port numbers in the packet are translated into different port numbers.
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.
For information about which devices support the features documented in this chapter, see the JUNOS Software Feature Support Reference for SRX Series and J Series Devices.
This chapter includes the following topics:
