What is a DNS server?

People who have basically been exposed to knowledge related to the network should have heard the term DNS.

Because it is very important, it plays an important role in our online process: "resolve the URL / domain name to an IP address".

If an unreasonable DNS server is configured, it can cause the speed of the network to be slow and the website to open. Some malicious DNS will also cause an ad popup on your computer, a hijacked modification of the website (man attack in the middle), monitoring, etc.

Safety issue Therefore, to stabilize high-speed Internet, I have deliberately compiled global and reliable public DNS service addresses that are currently available worldwide.

The full DNS name is Domain Name System or Domain Name Service. Its main function is to "translate" known URLs (domain names) to IP addresses that computers can understand. This process is called DNS domain name resolution.

For example, Baidu's baidu.com is a domain name that everyone can easily remember, but the computer can not find the website server directly through the domain name. Because on the Internet, network devices can only rely on IP addresses (equivalent to the house number on the Internet) to address and position to establish a connection.

Therefore, the DNS server itself must maintain sufficient stability for a long time. The resolution of domain names must be fast enough and the speed and stability of your Internet access can be guaranteed. Once the DNS server "has a problem", such as its own failure, or the ability to resolve the URL of the IP address, the resolution is particularly slow, or resolving the incorrect IP address, etc., it will lead to a variety of Internet users Do not open the website, slow down the Internet and other incurable diseases.

And the quality DNS service is not only a fast resolution of domain names, but also some such as blocking malicious URLs, intelligent error correction, DNS contamination solution and accurate analysis of CDN to the IP node more close to you (which greatly improves the file). Download speed) and other functions.

DNS servers are generally financed by Internet service providers (ISP), such as telecommunications / mobile broadband. They have established multiple sets of DNS servers across the country. They are automatically assigned to you by region when you dial the Internet. In general, you can ignore them. Normal access to the internet However, the problem is that the DNS provided by some regions is often time of inactivity, overcrowding, does not expand timely, and the Internet is solved slowly when the Internet reaches its peak. Even the staff of the local computer room abuses their powers to obtain personal benefits, uses DNS to hijack websites, secretly inserts ads / induction / inhalation accounts. Passwords, etc., will affect the speed of the network and the online experience and the security of the user's account.

In short, if you are unstable on the Internet, trying to replace a group of DNS faster, more stable, cleaner, more secure and without hijacking can solve the problem. Fortunately, in addition to the broadband provider's DNS, large Internet companies such as Alibaba Cloud, Tencent Cloud, Google, Baidu, IBM, CNNIC, etc. They are also very generous to provide the public with a free DNS resolution server. Xiaobian has compiled a list of these addresses of reliable, free and high speed public DNS servers around the world for you to choose from.

The following collections are the IP addresses of the most reliable free public DNS services currently available worldwide (most nationally). Due to regional differences, the performance of the same group of DNS servers in different countries and regions is not exactly the same, resolution speed, response time, etc. They are different, so it is recommended that you take the results of the automatic speed measurement as standard, and compare and choose.

DNS + public is a public DNS service owned by Tencent Cloud. With more than 80 national lines and 4 lines abroad, it has BGP Anycast technology and is the first public DNS resolution service in China that supports the Google ECS protocol (edns-client-subnet). It uses only one IP, but there are three cluster disaster tolerance and second-level automatic failover. The speed measurement data in most places in China are very good and worth recommending.

Public DNS +

IPv4 address

Preferred: 119.29.29.29

Ali Public DNS is a free recursive DNS resolution system launched by Alibaba Cloud. It is said to be a group of hundreds of servers around the world with sufficient bandwidth resources. The goal is to become part of the domestic Internet infrastructure, and is compatible with BGP Anycast and ECS technology.

AliDNS Ali Public DNS

IPv4 address

Preferred: 223.5.5.5

Wait: 223.6.6.6

114 DNS The number of users in China is quite large and their DNS resolution success rate is high. Compared to the DNS of the ISP, you can access more national and foreign websites; it is said to be pure, there is no kidnapping, it is not necessary to support forced publicity or vulgar websites. Pain; 114DNS is done before, it has a certain amount of accumulated technology, good stability, although the speed is a bit worse than the previous two, but it can also be satisfactory. It also has a function that allows you to select different DNS groups for different purposes.

114 DNS

Regular public DNS (clean and without kidnapping)

Preferred: 114,114,114,114, alternative: 114,114,115,115

Intercept the phishing virus trojan website (protect the Internet)

Preferred: 114,114,114,119, waiting: 114,114,115,119

Block pornography sites (protect children)

Preferred: 114,114,114,110, replacement: 114,114,115,110

Public DNS resolution service of Baidu, support ipv4 and ipv6. As the largest search engine in China, Baidu has first-class infrastructure and high technical capacity, and domestic speed is quite fast! The service is fast and stable without hijacking, intelligently intercepts malicious websites and is compatible with BGP Anycast and ECS technologies.

Baidu BaiduDNS

IPv4 address: 180.76.76.76

IPv6 address: 2400: da00 :: 6666

The DNS Cake is a free public DNS resolution service of 360. It can make browsing more stable, faster and safer, block phishing websites for families, filter out illegal websites, establish an environment online and healthy, and automatically correct the errors of the domain names.

DNS Cake

Preferred (Telecom / Mobile / Tietong): 101.226.4.6

Alternative (Telecom / Mobile / Tietong): 218.30.118.6

Preferred (China Unicom): 123.125.81.6

Alternative (China Unicom): 140,207,198.6

sDNS (SecureDNS, called sDNS) is a free public cloud resolution service launched jointly by the China Internet Network Information Center, CNNIC, and national and foreign telecommunications operators. Its objective is to provide users with high-speed, secure and intelligent Internet access resolution services. The recursive cloud resolution service sDNS uses IP Anycast + BGP technology to distribute distributed heterogeneous services between regions and operators, which is faster and more stable than the DNS provided by operators.

CNNIC sDNS

IPv4 address

Preferred: 1.2.4.8

Wait: 210.2.4.8

OneDNS is a secure, fast and free niche DNS service. It can block malicious websites and get rid of DNS contamination and unscrupulous ISP hijacking. Accelerate your network connection while the high-speed lines across the North and the South.

OneDNS

IPv4 address

Preferred: 117.50.11.11

Wait: 117.50.22.22

Recommendation of the free public DNS resolution service of EE.

As its name implies, foreign DNS is, of course, suitable for foreign users. For home users, although these DNS servers are not fast in China, they have many effects. For example, when you buy a foreign VPS to create related applications, you can configure it to use external DNS, etc.

Google's public global DNS free service is designed to improve the speed of web browsing and improve the browsing experience of web users. Basically, it is not necessary to make more presentations. It can be the public DNS most used nowadays in the world. It is antiquated, stable and powerful.

Google public DNS

IPv4 address

Preferred: 8.8.8.8

Wait: 8.8.4.4

IPv6 address

Preferred: 2001: 4860: 4860 :: 8888

Wait: 2001: 4860: 4860 :: 8844

CloudFlare DNS is known as the fastest DNS service in the world (of course, it is not global> _ <), CloudFlare is one of the largest CDN / DDOS protection service providers in the world (cooperating with Baidu Cloud Acceleration in China) The global infrastructure resources are extremely rich, and the capital and technical force are quite strong. The speed measured in foreign countries is quite strong. Currently, I have changed all VPS overseas to this DNS. The speed of resolution is very fast, which is worth recommending!

DNS CloudFlare

IPv4 address

Preferred: 1.1.1.1

Wait: 1.0.0.1

IPv6 address:

Preferred: 2606: 4700: 4700 :: 1111

Wait: 2606: 4700: 4700 :: 1001

Quad9's free public DNS service (9.9.9.9), released by IBM, Global Cyber ​​Alliance and Packet Clearing House, is an intelligent security blockade of malicious websites, botnets, phishing attacks and other associated domain names to malicious hosts, and more Protection of privacy. This set of DNS can be used by friends who need security.

IBM Quad9

IPv4 address

Preferred: 9.9.9.9

Wait: 149,112,112,112

IPv6 address

Preferred: 2620: faith :: faith

Wait: 2620: faith :: 9

You can set up a public DNS on your router, which will be applied to all your devices. It can also be configured independently on a specific computer or mobile phone, as needed. The configuration methods of Win, macOS, Linux and other systems can be easily searched.

And not only computers and mobile phones, game consoles such as XBox, PS4 or any network device, can basically configure DNS. If you play games and download them too slowly, try changing a DNS to see the effect.