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Network Address Translation

Junos® OS Documentation for ACX, M, MX, PTX, and T Series Routers, Release 12.3

Overview
Configuration
Administration
Troubleshooting

Network Address Translation
Network Address Translation Overview

Overview
Network Address Translation
Network Address Translation Overview

Configuration Tasks
Configuring Addresses and Ports for Use in NAT Rules Configuring NAT Rules Configuring NAT Rule Sets Configuring Static Source Translation in IPv4 Networks Configuring Static Source Translation in IPv6 Networks Configuring Dynamic Source Address and Port Translation in IPv4 Networks Configuring Dynamic Source Address and Port Translation for IPv6 Networks Configuring Dynamic Address-Only Source Translation in IPv4 Networks Configuring Static Destination Address Translation in IPv4 Networks Configuring Port Forwarding for Static Destination Address Translation Configuring Translation Type for Translation Between IPv6 and IPv4 Networks Configuring NAT-PT Configuring Dynamic Source Address and Static Destination Address Translation (IPv6 to IPV4)

Configuration Tasks

Configuring Addresses and Ports for Use in NAT Rules

Configuring NAT Rules

Configuring NAT Rule Sets

Configuring Static Source Translation in IPv4 Networks

Configuring Static Source Translation in IPv6 Networks

Configuring Dynamic Source Address and Port Translation in IPv4 Networks

Configuring Dynamic Source Address and Port Translation for IPv6 Networks

Configuring Dynamic Address-Only Source Translation in IPv4 Networks

Configuring Static Destination Address Translation in IPv4 Networks

Configuring Port Forwarding for Static Destination Address Translation

Configuring Translation Type for Translation Between IPv6 and IPv4 Networks

Configuring NAT-PT

Configuring Dynamic Source Address and Static Destination Address Translation (IPv6 to IPV4)

NAT Rules Examples
Example: Configuring Static Source Translation in an IPv4 Network Configuring Static Source Translation in IPv6 Networks Example: Configuring Static Source Translation with Multiple Prefixes and Address Ranges Example: Configuring Dynamic Source Address and Port Translation (NAPT) for an IPv4 Network Example: Configuring Dynamic Source Translation for an IPv4 Network Example: Configuring Dynamic Source Address and Port Translation for an IPv6 Network Example: Configuring Dynamic Address-Only Source Translation Example: Configuring Dynamic Address-Only Source Translation in an IPv4 Network Example: Configuring Static Destination Address Translation Example: Configuring NAT in Mixed IPv4 and IPv6 Networks Example: Configuring the Translation Type Between IPv6 and IPv4 Networks Example: Configuring Dynamic Source Address and Static Destination Address Translation (IPv6 to IPV4) Example: Configuring Source Dynamic and Destination Static Translation Example: Configuring NAT-PT Example: Configuring Port Forwarding with Twice NAT Example: Configuring an Oversubscribed Pool with Fallback to NAPT Example: Configuring an Oversubscribed Pool with No Fallback Example: Assigning Addresses from a Dynamic Pool for Static Use Example: Configuring NAT Rules Without Defining a Pool Example: Preventing Translation of Specific Addresses Example: Configuring NAT for Multicast Traffic Example: Configuring Port Forwarding with Twice NAT

NAT Rules Examples

Example: Configuring Static Source Translation in an IPv4 Network

Configuring Static Source Translation in IPv6 Networks

Example: Configuring Static Source Translation with Multiple Prefixes and Address Ranges

Example: Configuring Dynamic Source Address and Port Translation (NAPT) for an IPv4 Network

Example: Configuring Dynamic Source Translation for an IPv4 Network

Example: Configuring Dynamic Source Address and Port Translation for an IPv6 Network

Example: Configuring Dynamic Address-Only Source Translation

Example: Configuring Dynamic Address-Only Source Translation in an IPv4 Network

Example: Configuring Static Destination Address Translation

Example: Configuring NAT in Mixed IPv4 and IPv6 Networks

Example: Configuring the Translation Type Between IPv6 and IPv4 Networks

Example: Configuring Dynamic Source Address and Static Destination Address Translation (IPv6 to IPV4)

Example: Configuring Source Dynamic and Destination Static Translation

Example: Configuring NAT-PT

Example: Configuring Port Forwarding with Twice NAT

Example: Configuring an Oversubscribed Pool with Fallback to NAPT

Example: Configuring an Oversubscribed Pool with No Fallback

Example: Assigning Addresses from a Dynamic Pool for Static Use

Example: Configuring NAT Rules Without Defining a Pool

Example: Preventing Translation of Specific Addresses

Example: Configuring NAT for Multicast Traffic

Example: Configuring Port Forwarding with Twice NAT

Configuration Statements
address address-allocation address-range application-sets applications cgn-pic destination-address destination-address-range destination-pool destination-port range destination-prefix destination-prefix-list destined-port dns-alg-pool dns-alg-prefix from hint ipv6-multicast-interfaces match-direction nat-type no-translation overload-pool overload-prefix pgcp pool port port-forwarding port-forwarding-mappings ports-per-session remotely-controlled rule rule-set services secured-port-block-allocation source-address source-address-range source-pool source-prefix source-prefix-list syslog translated-port term then translated translation-type transport use-dns-map-for-destination-translation

Configuration Statements

destination-address-range

destination-pool

destination-port range

destination-prefix