loudFlare established in 2009, is a famous free CDN Site Accelerator services company, CloudFlare also provides real-time security protection services and network optimization, using free + value-added model, can be free to use, there are fee-based services. There are also a lot of free useful CDN, but they are required to use the site for the record, no record for web sites may choose to use foreign CDN tools, the operation did not we think so much trouble, so in the country, CloudFlare also many major sites and blog of respected, today 3z school come to lead everyone to understand the next CloudFlare.
CloudFlare's CDN nodes mainly in the Netherlands, the United States, Hong Kong, France, Japan and other countries and regions, using the CloudFlare CDN node in the Asia-Pacific region can greatly accelerate the speed of your host access in the United States or Europe, currently free of CDN nodes are United States, only the enterprise Edition can be assigned domestic nodes.
CloudFlare big reason for fame, one skilled, has a strong hidden IP technology, can effectively prevent DDOS attacks, CC handful of technology in the world, many foreign sites are using it. However, to emphasize that, CDN acceleration does not apply to all foreign hosts, if the good VPS, cloud hosting, server, access speed is not very different with the host country, the response is slower. But most of the owners are roots, common configuration is generally used by the host, and therefore can be used free of charge to accelerate CloudFlare's CDN. CloudFlare on each node only a static file caching Web site, not a mirror, so once your host problems, the site is inaccessible. If the host is the use CloudFlare, there may be a lot less than the line to visit the city's foreign node, and the access speed will be affected, but when your site was attacked, you can use CloudFlare to defense, the effect is very good. Closer to home, following began to lead the formal entry into the world of CloudFlare.
A registered CloudFlare
CloudFlare official registered address: https://www.cloudflare.com/a/sign-up
1, click on the registered address ,fill out the email and password, click Create Account to create an account.
2. After successful registration, an account will guide you first log in to fill to speed up protection of domain names , fill your click Add Site, after also need to add another site, click on the Add site to the top right corner.
3. After you have added the site, CloudFlare will be prompted to automatically search your domain name resolution records , click on the next confirmation, and then will ask you to select a service plan, we can choose a free, picked out to determine the next step.
4, and then enter the configuration interface, you can also manually add or modify, support for A and CNAME records, such as adding as below, you can add all your primary or secondary domain name, click Add Record to add, click Continue Next .
5, 3Z school domain name is Ali cloud buy, we can be resolved according to their own domain name service provider's domain name tutorial, modify the DNS address, modified to the following two addresses, which is the free version of CloudFlare address .
6, modify the DNS changes to take effect after a good wait on the line, the effective time varies, but generally a few hours on the amendment certainly good .
7, after entry into force, then refresh the current page, a green banner appears , the state becomes effective, CDN acceleration is complete.
Two, CloudFlare Features
1、完成第一步的工作后就可以看到设置菜单了，大部分的设置都可以默认，英文阅读有障碍的同学可以下个谷歌Chrome浏览器，有自动翻译功能，在Caching高速缓存里的那项，经常会用到，就是缓存你的静态文件后，比如你更改了一个页面的图片或者内容，只清除单个文件就行了，如果是全站内容，清除所有即可。
2、点击Purge Everything清除一切，立刻生效，清除自己浏览器缓存后，就可以看到新的内容了。清除后，CloudFlare的节点会重新缓存你网站的内容。
3、另外不得不说的是CloudFlare强大的防火墙，只需要添加国家英文名字或英文简写，就可以屏蔽一个国家的IP，第一个是黑名单，第二个是白名单，第三个是验证码，第四个是核实机器人攻击。黑名单只有企业用户才能用，所以选择captcha或者javascrpt就行，使用CloudFlare时，选择的captcha，除了中国，其它国家访问都得验证码，这样就可以避免扫描和攻击网站。
防御CC的能力比任何一家CDN商都强。全球90%以上的网站会被扫描攻击，CloudFlare隐藏IP的能力非常强悍，如果安装了CloudFlare还遭受攻击，那么网站IP应该已经暴露。
4、最后要说的就是高级会员了，价格很贵，每个月200美金，无线抗DDOS，抗DDOS，没有比CloudFlare更强的了。点击DNS中下的升级业务计划（upgrade to Business plan），选择200美元的套餐，下一步信用卡或PayPal支付就行了，一般被迫升级的，要么做的是灰色产业，要么就是行业竞争大。
一般被DDOS都是IP暴露，所以选择升级的话，一定要更换一个新的主机IP或重新买一台主机。然后CF解析到新IP上。
Although CloudFlare's CDN for free, but it is also not to be underestimated powerful, very powerful acceleration, CloudFlare nodes is still very broad, Japan, Hong Kong, the Netherlands, France, the United States, but it is regrettable that, added to Chinese users the nodes are the United States. You need to know that, and that is foreign ventilation lines, often encounter this kind of thing, for a fast, a slower, one will not connect.
Typically, a node will be a lot of access to the site, so the use of more than one person, there is more instability, because CloudFlare to add the domain name does not review what website can add some gray station were attacked by hackers, the entire node also affected. But, after all, the service is free to use, so some service is expected to have some mental preparation, in any case, CloudFlare's free service is quite good, and recommend everyone to use. Today's share on here, follow- 3z school will share more as we continue CDN knowledge.