Book Image

Cloud Security Automation

By : Prashant Priyam
Book Image

Cloud Security Automation

By: Prashant Priyam

Overview of this book

Security issues are still a major concern for all IT organizations. For many enterprises, the move to cloud computing has raised concerns for security, but when applications are architected with focus on security, cloud platforms can be made just as secure as on-premises platforms. Cloud instances can be kept secure by employing security automation that helps make your data meet your organization's security policy. This book starts with the basics of why cloud security is important and how automation can be the most effective way of controlling cloud security. You will then delve deeper into the AWS cloud environment and its security services by dealing with security functions such as Identity and Access Management and will also learn how these services can be automated. Moving forward, you will come across aspects such as cloud storage and data security, automating cloud deployments, and so on. Then, you'll work with OpenStack security modules and learn how private cloud security functions can be automated for better time- and cost-effectiveness. Toward the end of the book, you will gain an understanding of the security compliance requirements for your Cloud. By the end of this book, you will have hands-on experience of automating your cloud security and governance.
Table of Contents (15 chapters)
Title Page
Packt Upsell

Virtual private cloud

Let's understand network security from AWS's perspective. In AWS, we define a network as a VPC, which stands for virtual private cloud. Before creating an EC2 instance, it's mandatory to define a VPC.

In a VPC, we define subnets, which are called network segments. Here, we break VPC and CIDR into multiple private and public subnets, as per the requirement. In AWS, we can have CIDR of maximum size /16

In AWS, VPC is an isolated network that is separated from other networks and associated with an AWS account. VPC includes the following:

  • Subnets
  • Route table
  • Internet gateway
  • Security group and network ACL

Apart from these, VPC also enables you to have a private connection with an AWS network using the following things:

  • VPN
  • Private link using VPC endpoint network
  • Direct Connect 

AWS networking best practices are:

  • Always use security groups: They provide stateful firewalls for Amazon EC2 instances at the hypervisor level. You can apply multiple security groups to a single instance...