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
Situation Awareness
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
Help Center/ NAT Gateway/ Best Practices/ Using a Public NAT Gateway and Direct Connect to Accelerate Internet Access

Using a Public NAT Gateway and Direct Connect to Accelerate Internet Access

Updated on 2024-08-15 GMT+08:00

Scenarios

You need to connect your on-premises data center to Huawei Cloud using Direct Connect and then add SNAT rules to enable your on-premises servers to access the Internet through a public NAT gateway in a secure, reliable, and high-speed way, or add DNAT rules to enable your on-premises servers to provide services accessible from the Internet. This practice can be used in similar scenarios like Internet, gaming, e-commerce, and finance.

Solution Advantages

With Direct Connect, you can access a VPC on Huawei Cloud over high-performance, low-latency, and secure networks. A Direct Connect connection supports up to 10 Gbit/s bandwidth, meeting your service requirements.

With SNAT and DNAT of the public NAT gateway, your servers can share an EIP for Internet access, saving costs on EIPs. You can change the public NAT gateway types and EIPs bound to it at any time. The configuration is simple and will take effect immediately.

Typical Topology

The CIDR block of your on-premises data center is 172.18.0.0/24, which will access the VPC deployed in the CN-Hong Kong region. The CIDR block of the accessed VPC is 172.16.0.0/24.

Implementation methods:

  1. A Direct Connect connection is used to connect your on-premises data center to the VPC.
  2. A public NAT gateway is created in the VPC, enabling Internet connectivity for your on-premises servers.
    Figure 1 Network topology

Prerequisites

  • The default route of your on-premises data center is available for configuring Direct Connect.
  • The CIDR block of your on-premises data center does not overlap with the subnet CIDR block of the VPC. Otherwise, the communications between your on-premises data center and the VPC will fail.

Procedure

  1. Create a VPC.

    For detailed operations, see Creating a VPC.

  2. Configure a Direct Connect connection.

    Create a Direct Connect connection between your on-premises data center and the transit VPC (in the CN-Hong Kong region). For details, see Overview.
    NOTE:
    After the Direct Connect connection is created, configure routes in your on-premises data center as follows:
    • Static: Add the default route with 0.0.0.0/0 as the destination and set the next hop to the Direct Connect connection.
    • BGP: The on-premises network can learn the default route using BGP.

  3. Buy an EIP and configure a public NAT gateway.

    1. Buy an EIP in the CN-Hong Kong region. For details, see Assigning an EIP.
    2. Buy a public NAT gateway. For details about how to configure other parameters, see Buying a Public NAT Gateway.
    3. Add an SNAT rule by setting the CIDR block to that of the Direct Connect connection. For more details, see Adding an SNAT Rule.

      Set CIDR Block to 172.18.0.0/24 and select the EIP assigned in 1.

      Figure 2 Add SNAT Rule
    4. Add a DNAT rule. For details, see Adding a DNAT Rule.

      Configure the protocol and port type. All ports is used as an example. Set Private IP Address to 172.18.0.100 and select an EIP.

      Figure 3 Add DNAT Rule
      NOTE:

      SNAT and DNAT are used for different services. If an SNAT rule and a DNAT rule use the same EIP, there may be service conflicts. An SNAT rule cannot share an EIP with a DNAT rule with Port Type set to All ports.

Verification

After the configuration is complete, test the network connectivity.

Ping an external IP address, for example, 114.114.114.114, from a server in your on-premises data center.

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