Apple Cached Service causes IPhone App Store not to download programs

Beans recently met a very strange problem, the company inside the iphone/ipad connected to the WiFi, can not download the program from the App Store, but to update the program has been downloaded, but the PC and Mac side itune applestore Download no problem.

The bean Company's wireless network settings are chaotic, the basic structure is the client through the AP, the switch and the WLC are connected, and then the different SSIDs also use different authentication servers, some of the WLC's Web authentication, some Windows RADIUS servers, and some Cisco ISE, Finally, connect to the Internet via Palo Alto's firewall.

In short, the beans spent a lot of time to look at the firewall log, grab the packet, check the configuration file, test the rules of the server, the entire route map, and then did not see the problem, and finally inadvertently found that the problem may be OSX Server cache service caused.

Verify through the firewall log which IP access to the Lcdn-registration.apple.com/lcdn/register, this address is the cache server in Apple Registered Servers

A large amount of traffic was found to be sent from 10.3.1.101. This IP is a Carper server for the company.

Log on, stop the cache Service, find the download immediately return to normal!

Analysis: The cache service automatically registers his public IP address on Apple's server, and then when the other Apple device on the same network tries to update the software, the Apple server redirects the request to the cache server. This can explain why the new software can not be downloaded, because there is no, but the old software has been recorded, so the update.

This article is from the "Mapo Tofu" blog, please be sure to keep this source http://beanxyz.blog.51cto.com/5570417/1955148

Apple Cached Service causes IPhone App Store not to download programs