widen cdn

It is composed of a global Load balancer F5 and a CacheServer distributed across eight nodes nationwide. It provides page access acceleration and download acceleration. No. Name function machine room 1 F5 Load balancer Beijing Telecommunications 2 CDN-BZ CACHESERVER Shandong Netcom 3 CDN-CS CACHESERVER Jiangsu Telecom 4 CDN-CX CACHESERVER Yunnan Telecom 5

CDN (Content Delivery network) is a kind of advanced traffic distribution network based on the existing Internet. is different from mirroring, equivalent to CDN = Mirror (mirror) +Cache + Overall load balancing (GSLB). At present, the CDN has cached the static data in the website mainly, such as css,js, picture and static page data, the user requests from the mai

Yiche.com won the CDN Management System in multiple positions With so many vulnerabilities, I had the illusion that it was a honeypot. The importance of the CDN management system is needless to say. However, the following content is found in a log file: --2014-05-13 17:30:38-- http://59.151.127.48/SystemOpsPlatform/php/Interface/receiveApplyFeedback.phpConnecting to 59.151.127.48:80... connected.HTTP reque

Early in the morning of September 18, 2014, Apple released a new version of the iOS8 system, which, unsurprisingly, sparked an unprecedented upsurge in "fruit powder" downloads, triggering the entire Apple world.iOS8 is known by the industry as the "most significant update since the launch of the App Store", offering hundreds of enhancements and supporting Iphone4s, IPhone5, iphone5c, IPhone5S, IPhone6, IPhone6 Plus, iPad2, IPad3, IPad4, ipad Air, ipad Mini, ipad Mini2, and more. Of course, this

Previously, jquery script library was introduced in the website as follows: Sometimes we need to introduce other large script class libraries, such as prototype. Every time we introduce them, we have to consider how depressing customers are when they open the web page. Now, Google and Microsoft provide CDN services for libraries such as jquery, prototype, and mootools. In this way, users can access these scripts through

Principle of CDN small files The following are some of my personal knowledge, which may be incomplete or even incorrect, but I hope you can help us to correct them. Before a vro, it is possible to make optical splitting/image (Personal sensory splitting is mainly for optical fiber splitting, while ordinary Network cables should use images ), it is also possible to copy the packet to DPI (redirect server) through Forward after the packet arrives at t

The CDN cache cannot be used for images generated by PHP files, Today, I found that there is a problem online. An online image domain name has been added to the CDN cache on the front end. If it is not cached, I will use PHP to dynamically scale the image, however, after PHP processes the image output, it will be read from the backend every time. The pressure on backend servers increases instantly. Accordin

Spinach Shield High Anti-CDN game Client Multi-port Custom CDN Defense, a key to hide real IP, seconds open, no need to move to ignore cc, wall domain name high-resolutionSelf-purchase automatic opening simple and convenient defense stronger. Second-rate resolution. Higher defensesNo user action is required. Intelligent Defense Intelligent Resolution Intelligent switching, ignoring CC attacksIgnoring all tr

Why do seven cows have string preservation? The application server string requires a CDN to speed up Reply content: Why do seven cows have string preservation? The application server string requires a CDN to speed up What do you mean by string preservation, which means that the file content after uploading is a string, or that the file name is a string after uploading; If you are referring to the c

On the blog bus last weekend, we invited friends from several startup companies in Shanghai to have a technical exchange: verycd scientists, kickoji, contacts, cdnunion, anjuke and Sun's startup solution experts; Topic 1: CDN cache of Dynamic ContentConclusion: currently, the CDN cache is still dominated by static content, and the dynamic page cache Expiration/update policy is complicated. However,

In EarthLiveSharp, cloudinary's CDN image cache automatically cleans up python scripts, It happened that there was a "EarthLiveSharp" that could be used to set the real-time Earth images of the Japanese sunflower Satellite 8 as screensaver. The official website of the earth's real-time images of sunflower Satellite 8 is: Beijing.Cloudinary is used for CDN to reduce the burden on the sunflower 8 server and i

① let the user access to a static file under the site root directory (provide the next file URL), access to the URL of the error message (return code such as OK, 403 Forbidden, 404 Not Found, etc.)② user ping domain to get the node IP is what, ping domain name has no packet lost③ User Terminal equipment access to the http://ping.huatuo.qq.com/display of the terminal device IP and local DNS is what④ If there is a packet loss, the tracert-d CDN node IP

Early September 18, 2014, Apple unveiled a new version of the iOS8 system. Unsurprisingly, it sparked an unprecedented upsurge in "fruit powder" downloads. Detonate the entire Apple world.iOS8 is known by the industry as the "most significant update since the launch of the App Store", with hundreds of enhancements and support for iphone4s, IPhone5, iphone5c, IPhone5S, IPhone6, IPhone6 Plus, iPad2, IPad3, IPad4, ipad Air, ipad Mini, ipad Mini2, and more. Of course. This also means that the vast m

The popular Linux distribution Ubuntu has a recent update source that is distributed as a CDN. The advantage of this approach over traditional mirror servers is that the CDN service will automatically download the fastest route to your location. The current Mozilla Open source repository also provides this acceleration, replacing the previous mirror server. CDN S

Chapter 3rd DNS for setting up domain names We'll warm up before the play starts. Intelligent DNS can be said to be the basis of CDN. Believe that everyone do the site will have the following situation: Home page two links, telecommunications users please visit the main site A, Netcom users please visit the Mirror site B. Then do two domain names, www.naizhao.com point to a,cnc.naizhao.com point B. The user looked at half a day feel dizzy, casually p

Many webmaster in the process of building a large web site, often encounter the site in a specific area to open the problem of slow speed. This is usually done in that area to do a site image, through smart DNS to determine the user access to which mirror server. Here we use WDCP and WDCDN to build our CDN acceleration point. Because WDCDN relies on WDCP, we first install WDCP.The specific steps are as follows: First step: Install WDCP 1.X wget

secondsDisadvantagesCan't go wrong, or the problem will be very seriousBackup is unsuccessful and cannot be restored to a point in time3. Virtual Network Technology1.vlanIP-based Port-based technology for MAC addressesLimit broadcast to the scope of each virtual network, thus reduce the transmission of broadcast packets across the network, and improve the transmission efficiency of the network.at the same time, the virtual network can not communicate directly, but must be forwarded through the

1. The user enters www.web.com this domain name to the browser, the browser discovers the local no DNS cache for the first time, requests to the website DNS server;2. The DNS domain name resolver of the website has set up the CNAME, pointing to the www.web.51cdn.com, the request points to the intelligent DNS load balancing system in the CDN network;3. The intelligent DNS load Balancing system resolves the domain name and returns the IP node with the f

1. The user enters www.web.com this domain name to the browser, the browser discovers the local no DNS cache for the first time, requests to the website DNS server;2. The DNS domain name resolver of the website has set up the CNAME, pointing to the www.web.51cdn.com, the request points to the intelligent DNS load balancing system in the CDN network;3. The intelligent DNS load Balancing system resolves the domain name and returns the IP node with the f

The full name of the CDN is the Content Delivery network, which is the contents distribution networks. The basic idea is to avoid the bottleneck and link of the Internet which may affect the speed and stability of data transmission, and make the content transmission faster and more stable. By placing the node servers in the network, a layer of intelligent virtual network based on the existing Internet, the CDN