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Table of Contents Expand all

play_arrow Overview
- play_arrow Next Gen Services Overview
  - Next Gen Services Overview
- play_arrow Configuration Overview
- play_arrow Global System Logging Overview and Configuration
- play_arrow Next Gen Services SNMP MIBS and Traps
  - Next Gen Services SNMP MIBs and Traps
play_arrow Carrier Grade NAT (CGNAT)
- play_arrow Deterministic NAT Overview and Configuration
  - Deterministic NAPT Overview for Next Gen Services
  - Configuring Deterministic NAPT for Next Gen Services
- play_arrow Dynamic Address-Only Source NAT Overview and Configuration
  - Dynamic Address-Only Source Translation Overview
  - Configuring Dynamic Address-Only Source NAT for Next Gen Services
- play_arrow Network Address Port Translation Overview and Configuration
  - Network Address Port Translation (NAPT) Overview
  - Configuring Network Address Port Translation for Next Gen Services
  - Configuring Syslog Events for NAT Rule Conditions with Next Gen Services
- play_arrow NAT46
  - NAT46 Next Gen Services Configuration Examples
- play_arrow Stateful NAT64 Overview and Configuration
  - Stateful NAT64 Overview
  - IPv4 Addresses Embedded in IPv6 Addresses
  - Configuring Next Gen Services Stateful NAT64
- play_arrow IPv4 Connectivity Across IPv6-Only Network Using 464XLAT Overview and Configuration
  - 464XLAT Overview
  - IPv4 Addresses Embedded in IPv6 Addresses
  - Configuring 464XLAT Provider-Side Translator for IPv4 Connectivity Across IPv6-Only Network for Next Gen Services
- play_arrow IPv6 NAT Protocol Translation (NAT PT)
  - IPv6 NAT PT Overview
  - IPv6 NAT-PT Communication Overview
- play_arrow Stateless Source Network Prefix Translation for IPv6 Overview and Configuration
  - Stateless Source Network Prefix Translation for IPv6
- play_arrow Transitioning to IPv6 Using Softwires
  - 6rd Softwires in Next Gen Services
- play_arrow Transitioning to IPv6 Using DS-Lite Softwires
  - DS-Lite Softwires—IPv4 over IPv6 for Next Gen Services
  - Configuring Next Gen Services DS-Lite Softwires
  - DS-Lite Subnet Limitation
  - Protecting CGN Devices Against Denial of Service (DOS) Attacks
- play_arrow Reducing Traffic and Bandwidth Requirements Using Port Control Protocol
  - Port Control Protocol Overview
  - Configuring Port Control Protocol
- play_arrow Transitioning to IPv6 Using Mapping of Address and Port with Encapsulation (MAP-E)
  - Mapping of Address and Port with Encapsulation (MAP-E) for Next Gen Services
  - Equal Cost Multiple Path (ECMP) support for Mapping of Address and Port with Encapsulation (MAP-E)
- play_arrow Monitoring and Troubleshooting Softwires
  - Ping and Traceroute for DS-Lite
  - Monitoring Softwire Statistics
  - Monitoring CGN, Stateful Firewall, and Softwire Flows
- play_arrow Port Forwarding Overview and Configuration
  - Port Forwarding for Next Gen Services
- play_arrow Port Translation Features Overview and Configuration
  - Address Pooling and Endpoint Independent Mapping for Port Translation
  - Round-Robin Port Allocation
  - Secured Port Block Allocation for Port Translation
- play_arrow Static Source NAT Overview and Configuration
  - Static Source NAT Overview
  - Configuring Static Source NAT44 or NAT66 for Next Gen Services
- play_arrow Static Destination NAT Overview and Configuration
  - Static Destination NAT Overview
  - Configuring Static Destination NAT for Next Gen Services
- play_arrow Twice NAPT Overview and Configuration
  - Twice NAPT Overview
  - Configuring Twice NAPT for Next Gen Services
- play_arrow Twice NAT Overview and Configuration
  - Twice Static NAT Overview
  - Configuring Twice Static NAT44 for Next Gen Services
  - Twice Dynamic NAT Overview
  - Configuring Twice Dynamic NAT for Next Gen Services
- play_arrow Class of Service Overview and Configuration
  - Class of Service for Services PICs (Next Gen Services)
play_arrow Stateful Firewall Services
- play_arrow Stateful Firewall Services Overview and Configuration
  - Stateful Firewall Overview for Next Gen Services
  - Configuring Stateful Firewalls for Next Gen Services
play_arrow Intrusion Detection Services
- play_arrow IDS Screens for Network Attack Protection Overview and Configuration
play_arrow Traffic Load Balancing
- play_arrow Traffic Load Balancing Overview and Configuration
  - Traffic Load Balancer Overview
  - Configuring TLB
play_arrow DNS Request Filtering
- play_arrow DNS Request Filtering Overview and Configuration
  - DNS Request Filtering for Disallowed Website Domains
  - DNS Request Filtering System Logging Error Messages
play_arrow URL Filtering
- play_arrow URL Filtering
  - URL Filtering Overview
  - Configuring URL Filtering
play_arrow Integration of Juniper ATP Cloud and Web filtering on MX Routers
- play_arrow Integration of Juniper ATP Cloud and Web filtering on MX Routers
  - Integration of Juniper ATP Cloud and Web Filtering on MX Series Routers
play_arrow Aggregated Multiservices Interfaces
- play_arrow Enabling Load Balancing and High Availability Using Multiservices Interfaces
play_arrow Inter-Chassis Services PIC High Availability
- play_arrow Inter-Chassis Services PIC High Availability Overview and Configuration
play_arrow Application Layer Gateways
- play_arrow Enabling Traffic to Pass Securely Using Application Layer Gateways
play_arrow NAT, Stateful Firewall, and IDS Flows
- play_arrow Inline NAT Services Overview and Configuration
play_arrow Configuration Statements

list Table of Contents

English

Configuring Twice Dynamic NAT for Next Gen Services

date_range 06-Dec-23

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Configuring the Source and Destination Pools for Twice Dynamic NAT

To configure the source and destination pools for twice dynamic NAT:

Create a source pool.

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user@host# edit services nat source pool nat-pool-name

Define the addresses or subnets to which source addresses are translated.

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[edit services nat source pool nat-pool-name]
user@host# set address address-prefix

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[edit services nat source pool nat-pool-name]
user@host# set address address-prefix to address address-prefix

Disable port translation.

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[edit services nat destination pool nat-pool-name]
user@host# set port no-translation

Define the NAT pool utilization levels that trigger SNMP traps. The raise-threshold is the pool utilization percentage that triggers the trap, and the range is 50 through 100. The clear-threshold is the pool utilization percentage that clears the trap, and the range is 40 through 100. The utilization is based on the number of addresses that are used.
```
[edit services nat source pool nat-pool-name]
user@host# set pool-utilization-alarm raise-threshold value
user@host# set pool-utilization-alarm clear-threshold value
```
If you do not configure pool-utilization-alarm, traps are not created.
Create a destination pool. Do not use the same name that you used for the source pool.
```
user@host# edit services nat destination pool nat-pool-name
```
Define the addresses or subnets to which destination addresses are translated.
```
[edit services nat destination pool nat-pool-name]
user@host# set address address-prefix
```
To allow the IP addresses of a NAT source pool or destination pool to overlap with IP addresses in pools used in other service sets, configure allow-overlapping-pools.
```
[edit services nat]
user@host# set allow-overlapping-pools
```

Configuring the NAT Rules for Twice Dynamic NAT

To configure the source and destination NAT rules for twice dynamic NAT:

Configure the source NAT rule name.

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 [edit services nat source]
user@host# set rule-set rule-set-name rule rule-name

Specify the traffic direction to which the NAT rule set applies.

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 [edit services nat source rule-set rule-set-name]
user@host# set match-direction (in | out | in-out)

Specify the addresses that are translated by the source NAT rule.

To specify one address or prefix value:

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 [edit services nat source rule-set rule-set-name rule rule-name]
user@host# set match source-address address

To specify a range of addresses, configure an address book global address with the desired address range, and assign the global address to the NAT rule:

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 [edit services address-book global]
user@host# set address address-name range-address lower-limit to upper-limit
 [edit services nat source rule-set rule-set-name rule rule-name]
user@host# set match source-address-name address-name

To specify any unicast address:

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 [edit services nat source rule-set rule-set-name rule rule-name]
user@host# set match source-address any-unicast

Specify one or more application protocols to which the source NAT rule applies. The number of applications listed in the rule must not exceed 3072.
```
 [edit services nat source rule-set rule-set-name rule rule-name]
user@host# set match application [application-name]
```
Configure the address-pooling paired feature if you want to ensure assignment of the same external IP address for all sessions originating from the same internal host.
```
[edit services nat source rule-set rule-set-name rule rule-name then source-nat mapping-type]
user@host# set address-pooling-paired
```
Specify the timeout period for address-pooling-paired mappings that use the NAT pool. The range is 120 through 86,400 seconds, and the default is 300. Mappings that are inactive for this amount of time are dropped.
```
[edit services nat source pool nat-pool-name]
user@host# set mapping-timeout mapping-timeout
```
If you do not configure ei-mapping-timeout for endpoint independent translations, then the mapping-timeout value is used for endpoint independent translations.

Specify the source NAT pool that contains the addresses for translated traffic.

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 [edit services nat source rule-set rule-set-name rule rule-name]
user@host# set then source-nat pool nat-pool-name

Configure the generation of a syslog when traffic matches the NAT rule conditions.
```
 [edit services nat source rule-set rule-set-name rule rule-name then]
user@host# set syslog
```

Configure the destination NAT rule name.

content_copy zoom_out_map
 [edit services nat destination]
user@host# set rule-set rule-set-name rule rule-name

Specify the traffic direction to which the destination NAT rule set applies.

content_copy zoom_out_map
 [edit services nat destination rule-set rule-set-name]
user@host# set match-direction (in | out | in-out)

Specify the destination addresses of traffic that the destination NAT rule applies to.

content_copy zoom_out_map
 [edit services nat destination rule-set rule-set-name rule rule-name]
user@host# set match destination-address address

To specify a range of addresses, configure an address book global address with the desired address range, and assign the global address to the NAT rule:

content_copy zoom_out_map
 [edit services address-book global]
user@host# set address address-name range-address lower-limit to upper-limit
 [edit services nat destination rule-set rule-set-name rule rule-name]
user@host# set match destination-address-name address-name

To specify any unicast address:

content_copy zoom_out_map
 [edit services nat destination rule-set rule-set-name rule rule-name]
user@host# set match destination-address any-unicast

Specify one or more application protocols to which the destination NAT rule applies. The number of applications listed in the rule must not exceed 3072.
```
 [edit services nat source rule-set rule-set-name rule rule-name]
user@host# set match application [application-name]
```

Specify the destination NAT pool that contains the destination addresses for translated traffic.

content_copy zoom_out_map
 [edit services nat destination rule-set rule-set-name rule rule-name]
user@host# set then destination-nat pool nat-pool-name

Configure the generation of a syslog when traffic matches the destination NAT rule match conditions.
```
 [edit services nat destination rule-set rule-set-name rule rule-name then]
user@host# set syslog
```

Configuring the Service Set for Twice Dynamic NAT

To configure the service set for twice dynamic NAT:

Define the service set.

content_copy zoom_out_map
 [edit services]
user@host# edit service-set service-set-name

Configure either an interface service, which requires a single service interface, or a next-hop service, which requires an inside and outside service interface.

content_copy zoom_out_map
 [edit services service-set service-set-name]
user@host# set interface-service service-interface interface-name

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 [edit services service-set service-set-name]
user@host# set next-hop-service inside-service-interface interface-name outside-service-interface interface-name

Specify the NAT rule sets to be used with the service set. Include the source NAT rule set and the destination NAT rule set.
```
 [edit services service-set service-set-name]
user@host# set nat-rule-sets rule-set-name
```

arrow_backward PREVIOUS Twice Dynamic NAT Overview

NEXT arrow_forward Class of Service for Services PICs (Next Gen Services)

Next Gen Services Interfaces User Guide for Routing Devices

ON THIS PAGE

Configuring Twice Dynamic NAT for Next Gen Services

Configuring the Source and Destination Pools for Twice Dynamic NAT

Configuring the NAT Rules for Twice Dynamic NAT

Configuring the Service Set for Twice Dynamic NAT

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