Timeout when connecting to the Yum repository of Alibaba Cloud

Example of error message:
 [Errno 12] Timeout on http://mirrors.aliyun.com/centos/6/os/x86_64/repodata/repomd.xml: (28, 'connect() timed out!')


In this case, check whether the DNS settings of your server are normal and wait to confirm whether the system returns the error again. If the issue persists, submit a ticket for help.