Network Address Translation User Guide

Use this guide to configure and manage Network Address Translation (NAT) on supported Juniper Networks devices. Learn about source NAT, destination NAT, static NAT, and persistent NAT. The guide also covers NAT rules, address pools, and IP address and port translation.

Section	Description
NAT	NAT translates IP addresses and ports to enable communication between private and public networks. NAT conserves public IPv4 addresses, hides internal IP addresses, and enhances network security. See NAT .
Source NAT	Source NAT translates the source IP address of outbound traffic to enable devices on a private network to communicate with external networks using a public IP address. See Source NAT.
Destination NAT	Destination NAT translates the destination IP address of incoming traffic to direct requests from a public IP address to an internal server. Destination NAT provides external users access to internal applications without exposing private IP addresses.. See Destination NAT.
Static NAT	Static NAT permanently maps a private IP address to a public IP address. Static NAT always uses the same public IP address for the same device, enabling consistent inbound and outbound communication. Administrators commonly use static NAT for publicly accessible servers. See Static NAT.
Persistent NAT	Persistent NAT maintains a fixed IP address and port mapping for the duration of a session. Retaining the mapping helps applications such as VoIP and SIP maintain stable connections across devices configured with NAT. See Persistent NAT and NAT64.

Documentation Conventions

For information about the notice icons and text and syntax conventions used in the documentation, see Documentation Conventions.