The full name of CDN is Content Delivery Network, that is, content distribution network. The basic idea is to avoid bottlenecks and links on the Internet that may affect the speed and stability of data transmission as much as possible, so as to make content transmission faster and more stable. By placing node servers all over the network to form a layer of intelligent virtual network based on the existing Internet, the CDN system can real-time according to the network traffic and the connection of each node, the load status, the distance to the user and the response time and other comprehensive information to redirect the user's request to the service node closest to the user. Its purpose is to enable users to obtain the required content nearby, solve the congestion situation of the Internet network, and improve the response speed of users' access to websites.
The CDN services of most service providers (such as Alibaba Cloud, Tencent Cloud, Huawei Cloud, etc.) are charged according to usage, and the price is not cheap. For small company webmasters, this will be a considerable expense. There are also some service providers that provide free CDN services. This article briefly summarizes the CDNs that are currently available for free, hoping to be helpful to webmasters of small websites.
1. Cloudflare
CloudFlare may be the earliest free CDN service for domestic netizens. If your website has worldwide users, then CloudFlare is likely to be suitable for you. The free version of CloudFlare is more powerful. Its highlight is that it can provide completely free SSL certificate enables https access with one click. If your website program is generated by Wordpress, the official also provides an official plug-in for WP users, which can be set up at one time and directly view CDN traffic in the background. To use CloudFlare, you must use CloudFlare DNS, but some IPs of CloudFlare have been harmonized domestically.
If you don't need to use domestic CDN services, then CloudFlare is undoubtedly a good choice. However, because its domain name resolution server is located abroad, the access speed is slower than that in China. If your main users are all domestic, then it is not recommended that you use CloudFlare.
2. Baidu Cloud Acceleration
Baidu Cloud Acceleration is a free CDN service launched by Baidu. Cloud Acceleration is divided into free version and paid version. The free version does not support SSL certificates, and overseas websites also support acceleration. Using Baidu Cloud CDN record-free acceleration server does not require filing, which not only saves the cost of filing, but also greatly shortens the filing time, bringing more convenience to website builders. Baidu Cloud CDN record-free acceleration servers cover nodes all over the country, and can automatically select the nearest node server according to the user's geographical location, so that the user's access speed is faster, and it can easily cope with high traffic conditions, ensuring that the website will not be affected due to access Crash under pressure. And if you have completed the filing, you can use Baidu Cloud Accelerator to guide the visiting users to the nearest and fastest node, and use high-speed caching, page optimization compression, back-to-source merging and other technologies to improve your website access speed, which is safe In terms of protection, Baidu Cloud’s acceleration protection measures are still very comprehensive. It even combines Baidu Statistics and Baidu Webmaster Platform’s multiple functions into a “package”, and Baidu Cloud’s daily traffic of 5G is actually very important for many small webmasters. Said, basically enough.
However, according to the editor's observation, Baidu Cloud Acceleration claims to be able to accelerate Baidu's indexing, but the effect is not very obvious. Cloud Acceleration also provides free domain name resolution services. But in any case, Baidu Cloud Acceleration Free Edition is one of the recommended options for many small webmasters.
3. Fire Umbrella Cloud
Fire Umbrella Cloud Converged CDN is based on the traditional CDN, and integrates the high-quality nodes of the world's mainstream CDN manufacturers through technical means, so as to realize the intelligent scheduling acceleration management service of the full business processing capacity. The integrated CDN comprehensively utilizes the above-mentioned Resources can be used to solve problems in actual scenarios, which can bring better service effects, more stable quality and relatively lower service costs.
Huosanyun mainly uses the nodes of Alibaba Cloud and Tencent Cloud in China. The free quota is 100GB, but its basic package is also relatively affordable. You can buy 100GB of annual domestic traffic for about 10 yuan. The special one is Huosan The cloud also supports network acceleration in unlimited regions around the world and acceleration when returning to China without filing, and supports nodes of many mainstream manufacturers such as Alibaba Cloud/Tencent Cloud/Wangsu Cloud/Baishan Cloud/CloudFount. Therefore, in terms of access speed, whether it is domestic acceleration Whether it is global acceleration or returning to China, there are very good experiences.
Four, shoot the cloud again
Youpaiyun is one of the earliest manufacturers in China to provide cloud storage and CDN services. Its free CDN service refers to the provision of free network acceleration services, allowing users to store static resources such as pictures, videos and other files in Youpaiyun's CDN On the node, the user's website page loading speed becomes faster, so that the user's visitors can obtain data more quickly.
The free CDN service provided by Youpaiyun is based on pay-per-traffic, that is, users need to pay for the part of the traffic that exceeds the free traffic. The free traffic is 10GB per month, and if the traffic is within 10GB, no charges will be incurred. However, if the user uses more than 10GB of traffic, it will be charged at a price of 0.42 yuan per GB (this is quite expensive).
Points to note: Youpaiyun’s free traffic has a monthly limit of 10GB. If you exceed this traffic limit, you need to pay for the excess.
The node locations of Youpaiyun Free CDN are mainly concentrated in China, and the billing method is based on bandwidth. For websites with a large amount of traffic and foreign traffic, the actual cost of using Youpaiyun Free CDN may be higher. Youpaiyun's free CDN service is only provided to new customers. If you have used other Youpaiyun's services, you can no longer use its free CDN service.
Five, Qi Niu Yun
Qiniu cloud storage has a wide range of applications. Whether it is Wordpress or Discuz forums, static files such as pictures and attachments can be accelerated using Qiniu cloud storage. For websites with many pictures and attachments, Qiniu cloud storage is very suitable. Because it is one of the brands that professionally provides static CDN acceleration services, Qiniu cloud storage free package service can be used regardless of pictures, audio and video, streaming media, files, etc.
Qiniu Cloud can use 10G of free storage, 10G of CDN traffic and 1 million Get requests per month. Qiniu Cloud also has many acceleration nodes overseas. Qiniu Cloud’s TCP compression optimization enables large images and styles in web pages Wait for seconds to load.
But please note that to use Qiniu CDN, you must ensure that there is a minimum amount of 10 yuan in the account, and the monthly 10G quota is really small and easy to use.
六、Encapsulate
Incapsula is a website in the United States that specializes in providing CDN services. Although it is not the earliest CDN service provider to become famous, for grassroots webmasters, Incapsula is the first choice for many foreign CDNs because it provides free services and CDN traffic There are no restrictions. Compared with his paid CDN, there are only some differences in DDOS and web page optimization loading.
Incapsula claims to be able to accelerate globally, but after testing, it is found that he actually has four nodes: the United States, the United Kingdom, Singapore, and Israel. When domestic websites perform accelerated access processing, they generally need to go through lines such as Hong Kong, Singapore, and Japan. The CDN nodes provided by Incapsula cover the above areas (Singapore). Due to the large number of free users, the acceleration effect of Incapsula is not as good as before.
7. 360 CDN
360 Website Guard is a service platform under 360 that provides active protection for websites. It provides free website firewall, DDOS protection, CC protection, intelligent DNS resolution, hotlink protection, page compression, cache acceleration and permanent online services for webmasters.
360CDN is a webpage acceleration function in 360 Website Guard, claiming to have anti-cross-site, anti-injection, anti-tampering, anti-horse and other functions, especially in the acceleration settings, you can set the cache content by yourself. 360 website acceleration is due to the multi-node configuration. Its acceleration effect in China is good, but according to the test, it is found that its performance is not very stable, and the acceleration situation fluctuates from good to bad.
The websites that use 360 Website Guard must be registered and free of pornographic, private server, reactionary and illegal content before using 360 Website Guard. Any pornographic, private servers, reactionary and unregistered websites that contain illegal content cannot be added to Website Guard.
Eight, SpeedyMirror
SpeedyMirror is a free CDN acceleration service from the United States. The servers are mainly distributed in the United Kingdom and the United States. It is more suitable for websites with hosts placed abroad. The disadvantage is that the network nodes are not as widely distributed as CloudFlare.
Speedy Mirror can quickly create mirrors for your website in various places, supports static and dynamic pages, and also supports SSL. It has anti-leech function, easy to use, no need to modify DNS server, just set CNAME alias resolution. Speedy Mirror provides 50G traffic for each free user, which is basically enough for personal sites.
九、Google PageSpeed Service
Google PageSpeed Service is a website acceleration product produced by Google. This website acceleration product can automatically compress and optimize CSS, pictures, JS, and Html on your website, enable and optimize content, DNS cache, etc., and has anti-DDos and cc attack capability.
After using Google's free CDN, your website IP will automatically display as the Google service IP address, and Google's free traffic and nodes are temporarily unlimited.
For domestic users, in addition to registration difficulties, there is another problem that Google PageSpeed Service cannot provide domestic website and domestic server acceleration at present.