- What's New
- Function Overview
- Service Overview
- Billing
-
Getting Started
- Using a Public NAT Gateway to Enable Servers to Share One or More EIPs to Access the Internet
- Using a Public NAT Gateway to Enable Servers to Be Accessed by the Internet
- Using a Private NAT Gateway to Connect Cloud and On-premises Networks
- Using Multiple Public NAT Gateways Together in Performance-Demanding Scenarios
-
User Guide
- Public NAT Gateways
- Private NAT Gateways
- Permissions Management
- Tag Management
- Managing Quotas
- Monitoring
- Auditing
-
Best Practices
- Enabling Private Networks to Access the Internet Using a Cloud Connection and SNAT
- Using a Public NAT Gateway and Direct Connect to Accelerate Internet Access
- Using a Private NAT Gateway and Direct Connect to Enable Communications Between a VPC and an On-premises Data Center
- Using a Public NAT Gateway and VPC Peering to Enable Communications Between VPCs and the Internet
- Preserving Your Network with NAT Gateways During Cloud Migration
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API Reference
- Before You Start
- API Overview
- Calling APIs
- APIs of Public NAT Gateways
- APIs for Private NAT Gateways
- Application Examples
- Permissions Policies and Supported Actions
- Appendixes
- Out-of-Date APIs
- SDK Reference
-
FAQs
-
Public NAT Gateways
- What Is the Relationship Between a VPC, Public NAT Gateway, EIP Bandwidth, and ECS?
- How Does a Public NAT Gateway Offer High Availability?
- Which Ports Cannot Be Accessed?
- What Are the Differences Between Using a Public NAT Gateway and Using an EIP for an ECS?
- What Should I Do If I Fail to Access the Internet Through a Public NAT Gateway?
- Can I Change the VPC for a Public NAT Gateway?
- Does Public NAT Gateway Support IPv6 Addresses?
- What Security Policies Can I Configure to Implement Access Control If I Use a Public NAT Gateway?
- What Can I Do If Connection Between My Servers and the Internet Fails After I Add SNAT and DNAT Rules?
- Can a Public NAT Gateway Limit the Bandwidth of a Server?
- What Can I Do If the Number of Lost Packets of a Public NAT Gateway Exceeds the Threshold (or EIP Port Allocation Exceeds the Threshold)?
-
Private NAT Gateways
- How Do I Troubleshoot a Network Failure After a Private NAT Gateway Is Configured?
- How Many Private NAT Gateways Can I Buy in a VPC?
- Can I Increase the Numbers of SNAT and DNAT Rules Supported by a Private NAT Gateway?
- Can Private NAT Gateways Translate On-premises IP Addresses Connected to the Cloud Through Direct Connect?
- What Are the Differences Between Private NAT Gateways and Public NAT Gateways?
- Can a Private NAT Gateway Be Used Across Accounts?
-
SNAT Rules
- Why Do I Need SNAT?
- What Are SNAT Connections?
- What Is the Bandwidth of a Public NAT Gateway That Is Used by Servers to Access the Internet? How Do I Configure the Bandwidth?
- How Do I Resolve Packet Loss or Connection Failure Issues When Using a NAT Gateway?
- What Should I Do If My ECS Fails to Access a Server on the Public Network Through a Public NAT Gateway?
- What Are the Relationships and Differences Between the CIDR Blocks in a NAT Gateway and in an SNAT Rule?
- DNAT Rules
-
Public NAT Gateways
- Videos
- Glossary
-
More Documents
-
User Guide (ME-Abu Dhabi Region)
- Overview
- Getting Started
- Managing NAT Gateways
- Managing SNAT Rules
- Managing DNAT Rules
- Monitoring Management
-
FAQs
-
NAT Gateway
- What Is the Relationship Between VPC, NAT Gateway, EIP Bandwidth, and ECS?
- How Does A NAT Gateway Offer High Availability?
- Which Ports Cannot Be Accessed?
- What Can I Do If I Fail to Access the Internet Through the NAT Gateway?
- Can I Change the VPC for a NAT Gateway After It Is Created?
- What Is the Quota of the NAT Gateway?
-
SNAT
- Why SNAT Is Used?
- What Are SNAT Connections?
- What Is the Bandwidth of the NAT Gateway When a Server Accesses the Internet Through the NAT Gateway? Where Can I Configure the Bandwidth?
- How Do I Resolve Packet Loss or Connection Failure Issues When Using a NAT Gateway?
- What Are the Relationships and Differences Between the CIDR Blocks in a NAT Gateway and in an SNAT Rule?
- DNAT
-
NAT Gateway
- Change History
- API Reference (ME-Abu Dhabi Region)
-
User Guide (Paris Region)
- Overview
-
Getting Started
- Allowing a Private Network to Access the Internet Using SNAT
- Allowing Internet Users to Access a Service in a Private Network Using DNAT
- Allowing On-Premises Servers to Communicate with the Internet
- Using Private NAT Gateways to Enable Communications Between Cloud and On-premises Networks
- Using Multiple Public NAT Gateways Together in Performance-Demanding Scenarios
- Public NAT Gateways
- Private NAT Gateways
- Permissions Management
- Monitoring
-
FAQs
-
Public NAT Gateways
- What Is the Relationship Between a VPC, Public NAT Gateway, EIP Bandwidth, and ECS?
- How Does a Public NAT Gateway Offer High Availability?
- Which Ports Cannot Be Accessed?
- What Are the Differences Between Using a NAT Gateway and Using an EIP for an ECS?
- What Should I Do If I Fail to Access the Internet Through a NAT Gateway?
- Can I Change the VPC for a NAT Gateway?
- What Is the Quota of the NAT Gateway?
- Can I Update NAT Gateways and SNAT Rules?
- Does NAT Gateway Support IPv6 Addresses?
- What Security Policies Can I Configure to Implement Access Control If I Use a NAT Gateway?
- What Can I Do If Connection Between My Servers and the Internet Fails After I Add SNAT and DNAT Rules?
-
Private NAT Gateways
- How Do I Troubleshoot a Network Failure After a Private NAT Gateway Is Configured?
- How Many Private NAT Gateways Can I Create in a VPC?
- Can I Increase the Numbers of SNAT and DNAT Rules Supported by a Private NAT Gateway?
- Can an SNAT Rule and a DNAT Rule of a Private NAT Gateway Share the Same Transit IP Address?
- Can Private NAT Gateways Translate On-premises IP Addresses Connected to the Cloud Through Direct Connect?
- What Are the Differences Between Private NAT Gateways and Public NAT Gateways?
- Can a Private NAT Gateway Be Used Across ?
-
SNAT Rules
- Why Do I Need SNAT?
- What Are SNAT Connections?
- What Is the Bandwidth of a NAT Gateway That Is Used by Servers to Access the Internet? How Do I Configure the Bandwidth?
- How Do I Resolve Packet Loss or Connection Failure Issues When Using a NAT Gateway?
- What Should I Do If My ECS Fails to Access a Server on the Public Network Through a NAT Gateway?
- What Are the Relationships and Differences Between the CIDR Blocks in a NAT Gateway and in an SNAT Rule?
- DNAT Rules
-
Public NAT Gateways
- Change History
- API Reference (Paris Region)
-
User Guide (Kuala Lumpur Region)
- Overview
- Getting Started
- Managing NAT Gateways
- Managing SNAT Rules
- Managing DNAT Rules
- Permissions Management
- Monitoring Management
-
FAQs
- NAT Gateway
-
SNAT
- Why Is SNAT Used?
- What Are SNAT Connections?
- What Is the Bandwidth of the NAT Gateway When a Server Accesses the Internet Through the NAT Gateway? Where Can I Configure the Bandwidth?
- How Do I Resolve Packet Loss or Connection Failure Issues When Using a NAT Gateway?
- What Are the Relationships and Differences Between the CIDR Blocks in a NAT Gateway and in an SNAT Rule?
- DNAT
- Change History
- API Reference (Kuala Lumpur Region)
-
User Guide (Ankara Region)
- Service Overview
- Getting Started
- Public NAT Gateways
- Private NAT Gateways
- Permissions Management
- Monitoring
-
FAQs
- Public NAT Gateways
-
Private NAT Gateways
- How Do I Troubleshoot a Network Failure After a Private NAT Gateway Is Configured?
- How Many Private NAT Gateways Can I Create in a VPC?
- Can Private NAT Gateways Translate On-premises IP Addresses Connected to the Cloud Through Direct Connect?
- What Are the Differences Between Private NAT Gateways and Public NAT Gateways?
- Can a Private NAT Gateway Be Used Across Accounts?
- SNAT Rules
- DNAT Rules
- Change History
-
API Reference (Ankara Region)
- Before You Start
- API Overview
- Calling APIs
- APIs for Public NAT Gateways
- Private Nat API
- Permissions Policies and Supported Actions
- Common Parameters
- Change History
-
User Guide (ME-Abu Dhabi Region)
- General Reference
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Creating an SNAT Rule Using a Specific Subnet
Scenarios
This section describes how to create an SNAT 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 Virtual Private Cloud API Reference.
- Ensure that the VPC does not have a default route.
- You can create a 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.
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
- Create a NAT gateway.
- Determine the VPC to be used.
- Determine the subnet in the VPC to be used.
- Create a NAT gateway.
- API
URI format: POST /v2/{project_id}/nat_gateways
For details, see Creating a NAT Gateway.
- Example request
POST https://{Endpoint}/v2/27e25061336f4af590faeabeb7fcd9a3/nat_gateways
Obtain {endpoint} from Regions and Endpoints.
- Example response
{ "nat_gateway": { "router_id": "d84f345c-80a1-4fa2-a39c-d0d397c3f09a", "status": "PENDING_CREATE", "description": "my nat gateway 01", "admin_state_up": true, "tenant_id": "27e25061336f4af590faeabeb7fcd9a3", "created_at": "2017-11-18 07:34:32.203044", "spec": "1", "internal_network_id": "89d66639-aacb-4929-969d-07080b0f9fd9", "id": "a78fb3eb-1654-4710-8742-3fc49d5f04f8", "name": "nat_001", "dnat_rules_limit": "200", "snat_rule_public_ip_limit": "20", "enterprise_project_id": "0aad99bc-f5f6-4f78-8404-c598d76b0ed2", "billing_info": "" } }
- API
- Ensure that the NAT gateway is successfully created and is in the active state.
URI format: GET /v2/{project_id}/nat_gateways/{nat_gateway_id}
For details, see Querying Details About a Specified NAT Gateway.
- Make a note of the NAT gateway ID and the value of internal_network_id.
- Determine the EIP to be used.
- Create an SNAT rule.
- API
URI format: POST /v2/{project_id}/snat_rules
For details, see Creating an SNAT Rule.
- Example request
POST https://{Endpoint}/v2/27e25061336f4af590faeabeb7fcd9a3/snat_rules
Obtain {endpoint} from Regions and Endpoints.
Body:
{ "snat_rule": { "nat_gateway_id": "a78fb3eb-1654-4710-8742-3fc49d5f04f8", "network_id": "eaad9cd6-2372-4be1-9535-9bd37210ae7b", "source_type": 0, "floating_ip_id": "bdc10a4c-d81a-41ec-adf7-de857f7c812a", "description": "my snat rule 01" } }
- Example response
{ "snat_rule": { "floating_ip_id": "bdc10a4c-d81a-41ec-adf7-de857f7c812a", "status": "PENDING_CREATE", "nat_gateway_id": "a78fb3eb-1654-4710-8742-3fc49d5f04f8", "admin_state_up": true, "network_id": "eaad9cd6-2372-4be1-9535-9bd37210ae7b", "description": "", "source_type": 0, "tenant_id": "27e25061336f4af590faeabeb7fcd9a3", "created_at": "2017-11-18 07:54:21.665430", "id": "5b95c675-69c2-4656-ba06-58ff72e1d338", "floating_ip_address": "5.21.11.226" } }
- API
- Verify that the SNAT rule is successfully created.
- API
URI format: GET /v2/{project_id}/snat_rules/{snat_rule_id}
For details, see .
- Example request
GET https://{Endpoint}/v2/27e25061336f4af590faeabeb7fcd9a3/snat_rules/5b95c675-69c2-4656-ba06-58ff72e1d338
Obtain {endpoint} from Regions and Endpoints.
- Example response
{ "snat_rule": { "floating_ip_id": "bdc10a4c-d81a-41ec-adf7-de857f7c812a", "status": "ACTIVE", "nat_gateway_id": "a78fb3eb-1654-4710-8742-3fc49d5f04f8", "admin_state_up": true, "network_id": "eaad9cd6-2372-4be1-9535-9bd37210ae7b", "source_type": 0, "tenant_id": "27e25061336f4af590faeabeb7fcd9a3", "created_at": "2017-11-18 07:54:21.665430", "id": "5b95c675-69c2-4656-ba06-58ff72e1d338", "floating_ip_address": "5.21.11.226", "freezed_ip_address": "", "description": "my snat rule 01" } }
- API
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