- What's New
- Function Overview
- Service Overview
- Billing
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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
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User Guide
- Public NAT Gateways
- Private NAT Gateways
- Permissions Management
- Tag Management
- Managing Quotas
- Monitoring
- Auditing
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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- Out-of-Date APIs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
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FAQs
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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)?
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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?
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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
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Public NAT Gateways
- Videos
- Glossary
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More Documents
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User Guide (ME-Abu Dhabi Region)
- Overview
- Getting Started
- Managing NAT Gateways
- Managing SNAT Rules
- Managing DNAT Rules
- Monitoring Management
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FAQs
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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?
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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
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NAT Gateway
- Change History
- API Reference (ME-Abu Dhabi Region)
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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?
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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 ?
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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)
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User Guide (Kuala Lumpur Region)
- Overview
- Getting Started
- Managing NAT Gateways
- Managing SNAT Rules
- Managing DNAT Rules
- Permissions Management
- Monitoring Management
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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)
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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
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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
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User Guide (ME-Abu Dhabi Region)
- General Reference
Show all
Function Overview
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Public NAT Gateway
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Public NAT gateways provide NAT for servers in a VPC or on-premises servers that connect to the cloud through Direct Connect or Virtual Private Network (VPN), allowing multiple servers to share EIPs for Internet connectivity.
Public NAT Gateway: All regions
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Private NAT Gateway
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Private NAT gateways provide private address translation for servers in a VPC, enabling the servers to communicate with remote private networks.
Private NAT Gateway: AP-Bangkok, AP-Singapore, China-Hong Kong, CN North-Beijing4, CN East-Shanghai1, CN East-Shanghai2, CN South-Guangzhou, Africa-Johannesburg, and Southwest-Guiyang1
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Public NAT Gateway-Pay-per-use Billing Mode
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Public NAT gateways are billed based on the public NAT gateway type and service duration. There are four types of public NAT gateways: small, medium, large, and ultra-large. Public NAT gateways can be billed on a pay-per-use (day) basis.
Public NAT Gateway: All regions
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Private NAT Gateway-Pay-per-use Billing Mode
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Private NAT gateways started to charge in some regions from April 21, 2022. Private NAT gateways are billed based on the gateway type and service duration. There are four types of private NAT gateways: small, medium, large, and ultra-large. Private NAT gateways can be billed on a pay-per-use (hour) basis.
Private NAT Gateway: CN North-Beijing4, CN East-Shanghai1, and CN South-Guangzhou
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SNAT Rule
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There are public NAT gateways and private NAT gateways.
- Public NAT gateways support source NAT (SNAT) and destination NAT (DNAT).
SNAT translates private IP addresses into EIPs, allowing servers within an AZ or across multiple AZs in a VPC to share EIPs to access the Internet.
DNAT enables multiple servers within an AZ or across multiple AZs in a VPC to share EIPs to provide services accessible from the Internet. With an EIP, a NAT gateway forwards the Internet requests from only a specific port and over a specific protocol to a specific port of a server, or it can forward all requests to the server regardless of which port they originated on.
- Private NAT gateways provide private address translation for servers in a VPC, enabling the servers to communicate with remote private networks (other VPCs or on-premises servers).
SNAT enables multiple servers within an AZ or across AZs in a VPC to share a transit IP address to access servers in remote private networks.
DNAT enables servers within an AZ or across multiple AZs in a VPC to share the same transit IP address to provide services accessible from servers in remote private networks.
Public NAT Gateway: All regions
Private NAT Gateway: AP-Bangkok, AP-Singapore, China-Hong Kong, CN North-Beijing4, CN East-Shanghai1, CN East-Shanghai2, CN South-Guangzhou, Africa-Johannesburg, and Southwest-Guiyang1
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DNAT Rule
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There are public NAT gateways and private NAT gateways.
- Public NAT gateways support source NAT (SNAT) and destination NAT (DNAT).
SNAT translates private IP addresses into EIPs, allowing servers within an AZ or across multiple AZs in a VPC to share EIPs to access the Internet.
DNAT enables multiple servers within an AZ or across multiple AZs in a VPC to share EIPs to provide services accessible from the Internet. With an EIP, a NAT gateway forwards the Internet requests from only a specific port and over a specific protocol to a specific port of a server, or it can forward all requests to the server regardless of which port they originated on.
- Private NAT gateways provide private address translation for servers in a VPC, enabling the servers to communicate with remote private networks (other VPCs or on-premises servers).
SNAT enables multiple servers within an AZ or across AZs in a VPC to share a transit IP address to access servers in remote private networks.
DNAT enables servers within an AZ or across multiple AZs in a VPC to share the same transit IP address to provide services accessible from servers in remote private networks.
Public NAT Gateway: All regions
Private NAT Gateway: AP-Bangkok, AP-Singapore, China-Hong Kong, CN North-Beijing4, CN East-Shanghai1, CN East-Shanghai2, CN South-Guangzhou, Africa-Johannesburg, and Southwest-Guiyang1
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Public NAT Gateway-SNAT and DNAT Rules-EIP Sharing
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When adding SNAT and DNAT rules on a public NAT gateway, you can use the same EIP.
Public NAT Gateway: All regions
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Enterprise Project
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NAT Gateway resources can be managed by enterprise project. You can add NAT Gateway resources to or remove NAT Gateway resources from an enterprise project. You must manage NAT Gateway resources based on the permissions granted with the user group you belong to.
Public NAT Gateway: All regions
Private NAT Gateway: CN North-Beijing4, CN East-Shanghai1, CN South-Guangzhou, CN Southwest-Guiyang1, China-Hong Kong, AP-Bangkok, AP-Singapore, and Africa-Johannesburg
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