Overview
In a traditional DNS resolution, the DNS server randomly selects one of the IP addresses and returns the IP address to the website visitor regardless of the source of the visitor. In an intelligent DNS resolution, the DNS server returns an IP address based on the source of the visitor. The visitor can obtain the user-specified IP address when visiting the website. Intelligent DNS resolution reduces latency and improves the website access speed.
1. Example of traditional DNS resolution
For example, the domain name www.dns-example.top is hosted by three DNS servers. The IP addresses of these DNS servers are provided by China Unicom, China Mobile, and China Telecom. You can configure DNS resolution as follows:
Point the domain name to the IP address provided by China Unicom: 192.0.2.0
Point the domain name to the IP address provided by China Mobile: 192.0.2.1
Point the domain name to the IP address provided by China Telecom: 192.0.2.2
Effect of the configurations:
The three addresses 192.0.2.0, 192.0.2.1, and 192.0.2.2 are all returned to the visitor’s local DNS server. The local DNS server returns one of the IP addresses to the visitor randomly or based on preset priority. Traditional DNS resolution may cause cross-network access.
2. Example of intelligent DNS resolution
For example, the domain name www.dns-example.com is hosted by three DNS servers. The IP addresses of these DNS servers are provided by China Unicom, China Mobile, and China Telecom. You can configure DNS resolution as follows:
Set ISP Line to Default and point the domain name to the IP address provided by China Unicom: 192.0.2.0
Set ISP Line to China Mobile and point the domain name to the IP address provided by China Mobile: 192.0.2.1
Set ISP Line to China Telecom and point the domain name to the IP address provided by China Telecom: 192.0.2.2
Effect of the configurations:
Alibaba Cloud DNS returns results based on the source of the visitor. If the ISP of the visitor is China Mobile, Alibaba Cloud DNS returns 192.0.2.1. If the ISP of the visitor is China Telecom, Alibaba Cloud DNS returns 192.0.2.2. If the visitor is from other sources, Alibaba Cloud DNS returns 192.0.2.0.
Procedure
Log on to the Alibaba Cloud DNS console.
1 . In the left-side navigation pane, click Manage DNS. On the Domains tab, click a domain name to open the DNS Settings page.
3 . On the DNS Settings page, click Add Record.
Example:
Your DNS servers are hosted by China Telecom, China Unicom, and China Mobile. When you add a DNS record for your domain name, you can configure the ISP line as follows:
Set ISP Line to Default and point the domain name to the IP address provided by China Unicom: 192.0.2.0
Set ISP Line to China Mobile and point the domain name to the IP address provided by China Mobile: 192.0.2.1
Set ISP Line to China Telecom and point the domain name to the IP address provided by China Telecom: 192.0.2.2
Effect of the configurations:
Alibaba Cloud DNS returns results based on the source of the visitor.
If the ISP of the visitor is China Telecom Alibaba Cloud DNS returns 192.0.2.2.
If the ISP of the visitor is China Mobile, Alibaba Cloud DNS returns 192.0.2.1.
If the ISP of the visitor is neither China Telecom or China Mobile, Alibaba Cloud DNS returns 192.0.2.0.
By configuring the ISP line, you can ensure that Alibaba Cloud DNS returns specified IP addresses based on different visitor sources.
Supported lines
The following table lists the resolution lines that Alibaba Cloud DNS can use to identify requests:
Line name | sublevel circuit |
|---|---|
Aliyun | China(Hangzhou), China(Shanghai), China(Qingdao), China(Beijing), China(Zhangjiakou), China(Hohhot), China(Ulanqab), China(Shenzhen), China(Heyuan), China(Guangzhou), China(Chengdu), China(Hong Kong), Singapore, Australia(Sydney), Malaysia(Kuala Lumpur), Indonesia(Jakarta), Japan(Tokyo), Germany(Frankfurt), UK(London), US(Silicon Valley), US(Virginia), India(Mumbai), UAE(Dubai) |
Line name | Province |
|---|---|
Default | Global |
China Unicom, China Telecom, China Mobile, and China Edu | Shandong, Jiangsu, Anhui, Zhejiang, Fujian, Shanghai, Guangdong, Guangxi, Hainan, Hubei, Hunan, Henan, Jiangxi, Beijing, Tianjin, Hebei, Shanxi, Inner Mongolia, Ningxia, Xinjiang, Qinghai, Shaanxi, Gansu, Sichuan, Yunnan, Guizhou, Tibet, Chongqing, Liaoning, Jilin, and Heilongjiang |
China Dr. Peng | Anhui, Beijing, Chongqing, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Inner Mongolia, Ningxia, Qinghai, Shaanxi, Shandong, Shanghai, Shanxi, Sichuan, Tianjin, Xinjiang, Tibet, Yunnan, and Zhejiang |
China TV Network | Heilongjiang, Shandong, Inner Mongolia, Ningxia, Hunan, Guizhou, Qinghai, Liaoning, Henan, Jilin, Gansu, Hebei, Jiangsu, Anhui, Fujian, Hainan, Hubei, Shaanxi, Shanghai, Shaanxi, Sichuan, Tianjin, Tibet, Xinjiang, Zhejiang, Beijing, Chongqing, Guangdong, Guangxi, Jiangxi, and Yunnan |
Line name | Continent | Country or region |
|---|---|---|
Outside mainland China | N/A | N/A |
Outside mainland China | Oceania | Australia, New Zealand, Fiji, and Palau |
Outside mainland China | Asia | United Arab Emirates, China(Hong Kong), Indonesia, India, Japan, Cambodia, Korea, Laos, Myanmar, China(Macau), Maldives, Malaysia, Nepal, Philippines, Saudi Arabia, Singapore, Thailand, China(Taiwan), Vietnam, Mongolia, Pakistan, Kazakhstan, Uzbekistan, Turkey,Iraq, Israel, Kuwait, Lebanon, and Qatar |
Outside mainland China | Europe | Austria, Switzerland, Germany, Spain, France, United Kingdom, Italy, Netherlands, Russia, Sweden, Czech Republic, Belgium, Ireland, Denmark, Finland, Iceland, Hungary, Poland, Slovakia, Belarus, Lithuania, Ukraine, Bulgaria, Croatia, Portugal, Romania, and Slovenia |
Outside mainland China | North America | Canada, Mexico, and USA |
Outside mainland China | South America | Argentina, Brazil, Colombia, Venezuela, Ecuador, Peru, Bolivia, Chile, Paraguay, and Uruguay |
Outside mainland China | Africa | South Africa, Egypt, Nigeria, Angola, Ghana, Cote d’Ivoire, Kenya, Seychelles, Algeria, Cameroon, Morocco, Sudan, South Sudan, and Senegal |
Line name | Region | Province |
|---|---|---|
Default | N/A | N/A |
Mainland China | China East | Shandong, Jiangsu, Anhui, Jiangxi, Zhejiang, Fujian, and Shanghai |
Mainland China | China South | Guangdong, Guangxi, and Hainan |
Mainland China | Central China | Hubei, Hunan, and Henan |
Mainland China | China North | Beijing, Tianjin, Hebei, Shanxi, and Inner Mongolia |
Mainland China | China Northwest | Ningxia, Xinjiang, Qinghai, Shaanxi, and Gansu |
Mainland China | China Southwest | Sichuan, Yunnan, Guizhou, Tibet, and Chongqing |
Mainland China | China Northeast | Liaoning, Jilin, and Heilongjiang |
Edition comparison
Different versions of Alibaba Cloud DNS provide different resolution lines, please refer to the following:
Feature/Edition | Free Edition | Personal Edition | Enterprise Standard Edition | Enterprise Ultimate Edition |
|---|---|---|---|---|
Intelligent DNS resolution | China Unicom, China Telecom, China Mobile, CERNET, and outside China | China Unicom, China Telecom, China Mobile, Dr. Peng Telecom & Media Group, CERNET, China Broadcasting Network, and outside China | Aliyun, Provincial branches of China Unicom, China Telecom, China Mobile, Dr. Peng Telecom & Media Group, CERNET, and China Broadcasting Network, outside China (continents, countries, or regions) | All fixed intelligent DNS resolution lines included and custom IP range resolution supported |