1. Aliyun. https://www.aliyun.com/. Aliyun. https://www.aliyun.com/.
2. Amazon EC2. https://aws.amazon.com/ec2/. Amazon EC2. https://aws.amazon.com/ec2/.
3. Amazon EC2 and Amazon virtual private cloud. http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-vpc.html. Amazon EC2 and Amazon virtual private cloud. http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-vpc.html.
4. AWS IP address ranges. http://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html. AWS IP address ranges. http://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html.
5. Azure SDK for python. http://azure-sdk-for-python.readthedocs.io/en/latest/. Azure SDK for python. http://azure-sdk-for-python.readthedocs.io/en/latest/.