Solve the problem of abnormal page display in 12306 by yourself_html/css_WEB-ITnose

A few days ago, around Monday, I suddenly discovered that www.12306.cn of Great Wall Broadband at home could not be displayed normally. Clicking on the remaining ticket inquiry or ticket reservation could not be displayed normally, and the loading time was very long. The phenomenon is very similar to that resource files such as CSS are not loaded successfully (as shown in the picture). Changing chrome, firefox, and IE does not work. At first, I thought it was the result of a DDOS attack on the 12306 website by a large number of scalpers who could not get votes. Later, This has been the case after waiting for a few days, and these pages can be accessed normally on the China Unicom network where the company is located.

At this time I felt that I had to find the root cause. First, I opened the firebug debugging tool to check the network and found that several files were not successfully loaded. , it seems to be exactly the same as my guess. If I copy the URL and access it individually, it will wait for a long time and be very slow. I guess there may be something wrong with the CDN service used by 12306, and it happens to be the CDN selected by my network provider. Therefore, you only need to actively change the DNS locally. If my guess is correct, then the mobile phone will also be unable to display its page normally using the same wifi. If you try it immediately, the result will be as shown in the figure below.

Now I only need to find a correct IP address of kyfw.12306.cn that can be accessed and change it to the hosts file of my PC. It will be OK.

In order to find a usable IP, I thought of my mobile phone card’s Chinese mobile network operator. I disabled wifi and used data traffic. The browser refreshed and the full page was successfully loaded. This further illustrates the bad Great Wall. Broadband DNS is so unreliable. Turn on the app with the ping function on your phone and obtain two correct IPs through the China Mobile network: 12306.cn: 222.186.132.79 and kyfw.12306.cn: 182.140.130.51, and add them to C:WindowsSystem32driversetchosts:

222.186.132.79 www.12306.cn222.186.132.79 12306.cn182.140.130.51 kyfw.12306.cn

Save the hosts and restart the Firefox browser. Everything is done. When you open the remaining ticket query and ticket booking, everything displays normally!

It is estimated that many users of Great Wall Broadband have encountered the same problem as me, but ordinary users will definitely blame the problem of the 12306 website and scold it even more, because they will think that other websites can be accessed normally, but 12306 cannot. Of course it's a problem with 12306~~~ It also made me deeply feel that it is really difficult to stand up after being the scapegoat for a long time!