Compute
Elastic Cloud Server
Huawei Cloud Flexus
Bare Metal Server
Auto Scaling
Image Management Service
Dedicated Host
FunctionGraph
Cloud Phone Host
Huawei Cloud EulerOS
Networking
Virtual Private Cloud
Elastic IP
Elastic Load Balance
NAT Gateway
Direct Connect
Virtual Private Network
VPC Endpoint
Cloud Connect
Enterprise Router
Enterprise Switch
Global Accelerator
Management & Governance
Cloud Eye
Identity and Access Management
Cloud Trace Service
Resource Formation Service
Tag Management Service
Log Tank Service
Config
OneAccess
Resource Access Manager
Simple Message Notification
Application Performance Management
Application Operations Management
Organizations
Optimization Advisor
IAM Identity Center
Cloud Operations Center
Resource Governance Center
Migration
Server Migration Service
Object Storage Migration Service
Cloud Data Migration
Migration Center
Cloud Ecosystem
KooGallery
Partner Center
User Support
My Account
Billing Center
Cost Center
Resource Center
Enterprise Management
Service Tickets
HUAWEI CLOUD (International) FAQs
ICP Filing
Support Plans
My Credentials
Customer Operation Capabilities
Partner Support Plans
Professional Services
Analytics
MapReduce Service
Data Lake Insight
CloudTable Service
Cloud Search Service
Data Lake Visualization
Data Ingestion Service
GaussDB(DWS)
DataArts Studio
Data Lake Factory
DataArts Lake Formation
IoT
IoT Device Access
Others
Product Pricing Details
System Permissions
Console Quick Start
Common FAQs
Instructions for Associating with a HUAWEI CLOUD Partner
Message Center
Security & Compliance
Security Technologies and Applications
Web Application Firewall
Host Security Service
Cloud Firewall
SecMaster
Anti-DDoS Service
Data Encryption Workshop
Database Security Service
Cloud Bastion Host
Data Security Center
Cloud Certificate Manager
Edge Security
Managed Threat Detection
Blockchain
Blockchain Service
Web3 Node Engine Service
Media Services
Media Processing Center
Video On Demand
Live
SparkRTC
MetaStudio
Storage
Object Storage Service
Elastic Volume Service
Cloud Backup and Recovery
Storage Disaster Recovery Service
Scalable File Service Turbo
Scalable File Service
Volume Backup Service
Cloud Server Backup Service
Data Express Service
Dedicated Distributed Storage Service
Containers
Cloud Container Engine
SoftWare Repository for Container
Application Service Mesh
Ubiquitous Cloud Native Service
Cloud Container Instance
Databases
Relational Database Service
Document Database Service
Data Admin Service
Data Replication Service
GeminiDB
GaussDB
Distributed Database Middleware
Database and Application Migration UGO
TaurusDB
Middleware
Distributed Cache Service
API Gateway
Distributed Message Service for Kafka
Distributed Message Service for RabbitMQ
Distributed Message Service for RocketMQ
Cloud Service Engine
Multi-Site High Availability Service
EventGrid
Dedicated Cloud
Dedicated Computing Cluster
Business Applications
Workspace
ROMA Connect
Message & SMS
Domain Name Service
Edge Data Center Management
Meeting
AI
Face Recognition Service
Graph Engine Service
Content Moderation
Image Recognition
Optical Character Recognition
ModelArts
ImageSearch
Conversational Bot Service
Speech Interaction Service
Huawei HiLens
Video Intelligent Analysis Service
Developer Tools
SDK Developer Guide
API Request Signing Guide
Terraform
Koo Command Line Interface
Content Delivery & Edge Computing
Content Delivery Network
Intelligent EdgeFabric
CloudPond
Intelligent EdgeCloud
Solutions
SAP Cloud
High Performance Computing
Developer Services
ServiceStage
CodeArts
CodeArts PerfTest
CodeArts Req
CodeArts Pipeline
CodeArts Build
CodeArts Deploy
CodeArts Artifact
CodeArts TestPlan
CodeArts Check
CodeArts Repo
Cloud Application Engine
MacroVerse aPaaS
KooMessage
KooPhone
KooDrive
On this page

Show all

Help Center/ NAT Gateway/ API Reference/ Application Examples/ Example 2: Creating a Public NAT Gateway and Configuring a DNAT Rule

Example 2: Creating a Public NAT Gateway and Configuring a DNAT Rule

Scenarios

This section describes how to create a DNAT rule by calling APIs. For details about how to call APIs, see Calling APIs.

Prerequisites

  • You have created a VPC and a subnet. For details, see Creating a VPC and Subnet for an ECS.
  • Ensure that the VPC does not have a default route. (This restriction does not apply to the CN North-Beijing4 region.)
  • You can create a DNAT rule only when status of the NAT gateway is ACTIVE and admin_state_up of the NAT gateway administrator is True.
  • If you use a token for authentication, you must obtain the token and add X-Auth-Token to the request header when making an API call. Obtain the token by referring to Authentication.
NOTE:

The token obtained from IAM is valid for only 24 hours. If you want to use a token for authentication, you can cache it to avoid frequent calling.

Procedure

  1. Create a NAT gateway.

    1. Determine the VPC to be used.
      • Query VPCs.

        URI format: GET /v1/{project_id}/vpcs

        For details, see Querying VPCs.

      • Select a VPC that does not have a default route, and make a note of the VPC ID.
    2. Determine the subnet in the VPC to be used.
      • Query subnets in the VPC.

        URI format: GET /v1/{project_id}/subnets?vpc_id={vpc_id}

        For details, see Querying Subnets.

      • Select a subnet and make a note of the subnet ID.
    3. Create a public NAT gateway.
      • API

        URI format: POST /v2/{project_id}/nat_gateways

        For details, see Creating a Public NAT Gateway.

      • Example request

        POST https://{Endpoint}/v2/27e25061336f4af590faeabeb7fcd9a3/nat_gateways

        Obtain {endpoint} from Regions and Endpoints.

      • Example response
      {
          "nat_gateway": {
              "name": "nat_001",
              "description": "my nat gateway 01",
              "router_id": "d84f345c-80a1-4fa2-a39c-d0d397c3f09a",
              "internal_network_id": "89d66639-aacb-4929-969d-07080b0f9fd9",
              "spec": "1",
              "enterprise_project_id": "0aad99bc-f5f6-4f78-8404-c598d76b0ed2"
          }
      }
    4. Ensure that the public NAT gateway is successfully created and is in the active state.

      API

      URI format: GET /v2/{project_id}/nat_gateways/{nat_gateway_id}

      For details, see Querying the Details of a Public NAT Gateway.

    5. Make a note of the public NAT gateway ID and the value of internal_network_id.

  2. Determine the ECS to be used.

    1. Query ECSs.

      API

      URI format: GET https://{endpoint}/v1/{project_id}/cloudservers/detail

      For details, see Querying Details About ECSs.

    2. Select an ECS based on service requirements and make a note of the port ID of the ECS NIC.

  3. Determine the EIP to be used.

    1. Query EIPs.

      API

      URI format: GET /v1/{project_id}/publicips

      For details, see Querying EIPs.

    2. Select an EIP based on service requirements and make a note of the EIP ID.

  4. Create a DNAT rule.

    • API

      URI format: POST /v2/{project_id}/dnat_rules

      For details, see Creating a DNAT Rule.

    • Example request

      POST https://{Endpoint}/v2/27e25061336f4af590faeabeb7fcd9a3/dnat_rules

      Obtain {endpoint} from Regions and Endpoints.

      Body:

      {
          "dnat_rule": {
              "floating_ip_id": "bf99c679-9f41-4dac-8513-9c9228e713e1",
              "nat_gateway_id": "cda3a125-2406-456c-a11f-598e10578541",
              "port_id": "9a469561-daac-4c94-88f5-39366e5ea193",
              "internal_service_port": 993,
              "protocol": "tcp",
              "external_service_port": 242,
              "description": "my dnat rule 01"
          }
      }
    • Example response
      {
          "dnat_rule": {
              "floating_ip_id": "bf99c679-9f41-4dac-8513-9c9228e713e1",
              "status": "ACTIVE",
              "nat_gateway_id": "cda3a125-2406-456c-a11f-598e10578541",
              "admin_state_up": true,
              "port_id": "9a469561-daac-4c94-88f5-39366e5ea193",
              "internal_service_port": 993,
              "protocol": "tcp",
              "tenant_id": "abc",
              "created_at": "2017-11-15 15:44:42.595173",
              "id": "79195d50-0271-41f1-bded-4c089b2502ff",
              "external_service_port": 242,
              "floating_ip_address": "5.21.11.226",
              "description": "my dnat rule 01"
          }
      }

  5. Verify that the DNAT rule is successfully created.

    • API

      URI format: GET /v2/{project_id}/dnat_rules/{dnat_rule_id}

      For details, see Querying the Details of a DNAT Rule.

    • Example request

      GET https://{Endpoint}/v2/27e25061336f4af590faeabeb7fcd9a3/dnat_rules/5b95c675-69c2-4656-ba06-58ff72e1d338

      Obtain {endpoint} from Regions and Endpoints.

    • Example response
      {
          "dnat_rule": {
              "floating_ip_id": "bf99c679-9f41-4dac-8513-9c9228e713e1",
              "status": "ACTIVE",
              "nat_gateway_id": "cda3a125-2406-456c-a11f-598e10578541",
              "admin_state_up": true,
              "port_id": "9a469561-daac-4c94-88f5-39366e5ea193",
              "internal_service_port": 993,
              "protocol": "tcp",
              "tenant_id": "abc",
              "created_at": "2017-11-15 15:44:42.595173",
              "id": "79195d50-0271-41f1-bded-4c089b2502ff",
              "external_service_port": 242,
              "floating_ip_address": "5.21.11.226",
              "description": "my dnat rule 01"
          }
      }

We use cookies to improve our site and your experience. By continuing to browse our site you accept our cookie policy. Find out more

Feedback

Feedback

Feedback

0/500

Selected Content

Submit selected content with the feedback