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- What's New
- Function Overview
- Service Overview
- Getting Started
-
User Guide
- Public Zones
- Private Zones
- Record Sets
- PTR Records
- Intelligent Resolution
- Resolver
- Permissions Management
- Using CTS to Collect DNS Key Operations
- Access Logging
- Quota Adjustment
- Best Practices
-
API Reference
- Before You Start
- API Overview
- Calling APIs
- APIs
- Examples
- Permissions Policies and Supported Actions
- Appendix
- SDK Reference
-
FAQs
-
DNS Overview
- Will I Be Billed for the DNS Service?
- How Many Zones, PTR Records, and Record Sets Can I Create?
- What Are Huawei Cloud DNS Servers?
- What Are Huawei Cloud Private DNS Server Addresses?
- What Are the Differences Between Public and Private Domain Names?
- Does DNS Support IPv6?
- Does DNS Support Explicit Forwarding and Implicit Forwarding?
- Does DNS Support Dynamic Domain Name Resolution?
- Does DNS Support Wildcard Entries?
- What Is TTL?
- How Many Domain Name Levels Does DNS Support?
- How Are Zones Queried to Resolve a Domain Name?
- What Are the Priorities of Resolution Lines?
- Why Was the Email Address Format Changed in the SOA Record?
- What Is CAA?
- Why Should I Set Priority For an MX Record Set?
- Can DNS Point a Domain Name to a Specific Port?
- Invalid Domain Resolution
- Website Access Failures
-
Public Zones
- Why Is a Message Indicating Conflict with an Existing Record Set Displayed When I Add a Record Set?
- How Do I Handle the Conflict Between CNAME and MX Record Sets?
- How Do I Add Record Sets to Subdomains?
- Which IP Address Is Returned for the Domain Name If There Are Multiple IP Addresses in a Record Set?
- Can I Modify a Zone?
- Can DNS Translate a Domain Name to IP Addresses of On-premises Servers or Third-Party Servers?
- How Can Multiple Domain Names Be Linked to the Same Website?
- Configuring Weighted Routing
- Can DNS Resolve a Domain Name that Has Not Been Licensed?
- Does DNS Support Dynamic Domain Name Resolution?
- How Do I Change the DNS Servers of a Domain Name?
- How Do I Handle Inaccurate Scheduling Caused by the CNAME Record Set Cache in the Default Lines?
-
Private Zones
- Why Is a Message Indicating Conflict with an Existing Record Set Displayed When I Add a Record Set?
- How Do I Change Default DNS Servers of an ECS to Huawei Cloud Private DNS Servers?
- How Can I Access an ECS Using Its Host Name?
- How Can I Map the Private IP Address of an ECS to a Domain Name?
- How Can I Use a Private Domain Name to Route Internet Traffic?
- Can I Use Private Domain Names Across Regions?
- Do I Need to Register Private Domain Names?
- Will a Deleted VPC Be Automatically Disassociated from the Private Zone?
- Are Private DNS Server Addresses the Same for All Users?
- What Are the Restrictions on Concurrent Private DNS Queries?
- Reverse Resolution
- Domain Transfer
-
DNS Overview
- Videos
-
More Documents
-
User Guide (ME-Abu Dhabi Region)
- Overview
- Getting Started
- Private Zone
- Record Set
- PTR Record
- Permissions Management
- Key Operations Recorded by CTS
- Quota Adjustment
- FAQs
- Change History
- API Reference (ME-Abu Dhabi Region)
-
User Guide (Paris Region)
- Overview
- Getting Started
- Public Zones
- Private Zones
- Record Sets
- PTR Records
- Intelligent Resolution
- Permissions Management
- Key Operations Recorded by CTS
- Quota Adjustment
-
FAQ
-
DNS Overview
- Will I Be Billed for the DNS Service?
- How Many Zones, PTR Records, and Record Sets Can I Create?
- What Are DNS Servers?
- What Are the Differences Between Public and Private Domain Names?
- Does DNS Support IPv6?
- Does DNS Support Explicit and Implicit URLs?
- Does DNS Support Dynamic Domain Name Resolution?
- Does DNS Support Wildcard Entries?
- What Is TTL?
- How Many Domain Name Levels Does DNS Support?
- How Are Zones Queried to Resolve a Domain Name?
- Why Was the Email Address Format Changed in the SOA Record?
- What Is CAA?
- Why Should I Set Priority For an MX Record Set?
- Can DNS Point a Domain Name to a Specific Port?
-
Public Zones
- How Do I Add Record Sets to Subdomains?
- Which IP Address Is Returned for the Domain Name If There Are Multiple IP Addresses in a Record Set?
- What Can I Do If There Is Message Indicating that the Public Zone Already Exists?
- Can I Modify a Zone?
- How Can Multiple Domain Names Be Linked to the Same Website?
- Configuring Weighted Routing
-
Private Zones
- How Can I Map the Private IP Address of an ECS to a Domain Name?
- Can I Use Private Domain Names Across Regions?
- Do I Need to Register Private Domain Names?
- Will a Deleted VPC Be Automatically Disassociated from the Private Zone?
- Are Private DNS Server Addresses the Same for All Users?
- What Are the Restrictions on Concurrent Private DNS Requests?
- Reverse Resolution
-
DNS Overview
- Change History
- API Reference (Paris Region)
-
User Guide (Kuala Lumpur Region)
- Overview
- Getting Started
- Private Zone
- Record Set
- Permissions Management
- Key Operations Recorded by CTS
- Quota Adjustment
-
FAQs
-
DNS Overview
- Will I Be Billed for the DNS Service?
- How Many Zones and Record Sets Can I Create?
- What Are the Private DNS Servers Provided by the DNS Service?
- Does DNS Support Wildcard Entries?
- How Are Zones Queried to Resolve a Domain Name?
- Why Was the Email Address Format Changed in the SOA Record?
- Can DNS Point a Domain Name to a Specific Port?
- Private Zones
-
DNS Overview
- Change History
- API Reference (Kuala Lumpur Region)
- User Guide (Ankara Region)
- API Reference (Ankara Region)
-
User Guide (ME-Abu Dhabi Region)
- Glossary
- General Reference
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Notes and Constraints
Quotas
You can log in to the console to view the default quotas for each resource. To increase the quotas, you can submit a service ticket.
Resource Type |
Default Quota |
How to Increase |
---|---|---|
Public zone |
50 |
|
Private zone |
50 |
|
Record set |
500 |
|
PTR record |
50 |
|
Custom line |
50 |
|
Inbound endpoint |
50 |
|
Outbound endpoint |
50 |
|
Endpoint rule |
50 |
Specifications
Resource Type |
Specifications |
Description |
---|---|---|
Maximum number of IP addresses that can be bound to an endpoint |
6 |
Submit a service ticket to increase the quota. |
Maximum number of VPCs that can be associated with a private zone |
Unlimited |
- |
Maximum number of VPCs that can be associated with an endpoint rule |
Unlimited |
- |
Maximum number of requests for a single ECS in a VPC |
2,000 per second |
For a single ECS in a VPC, the maximum number of resolution requests is 2,000 per second. If the number of requests exceeds this, extra requests may not be handled. To avoid this, enable DNS caching to improve lookup efficiency. |
Total number of requests for all ECSs in a VPC |
Unlimited |
- |
Maximum number of recursive resolution requests for a single ECS in a VPC |
600 per second |
For a single ECS in a VPC, the maximum number of external recursive requests is 600 per second. If the number of requests exceeds this, extra requests may not be handled. If your services initiate an enormous volume of concurrent requests, enable DNS caching to improve lookup efficiency. |
Total number of recursive requests for all ECSs in a VPC |
5,000 per second |
For all ECSs in a VPC, the maximum number of external recursive requests is 5,000 per second. If the number of requests exceeds this, extra requests may not be handled. If access to a large number of Internet domain names is required, some domain names may not be accessible due to traffic limiting. To avoid this, submit a service ticket. |
Maximum number of recursive resolution requests for a single domain name in a VPC |
50 requests per second |
For a single domain name (for example, example.com) and its subdomains in a VPC, the maximum number of external recursive requests is 50 per second. If the number of requests exceeds this, extra requests may not be handled. |
Maximum number of requests to a single IP address configured for an inbound endpoint |
10,000 requests per second |
Up to 10,000 requests can be routed to a single endpoint IP address per second, and up to 600 external recursive requests can be routed to a public domain name per second. If the number of requests exceeds these limits, extra requests may not be handled. To avoid this, enable DNS caching for your on-premises network to improve lookup efficiency. |
Maximum number of requests from a single IP address configured for an outbound endpoint |
10,000 requests per second |
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