Book Image

Zscaler Cloud Security Essentials

By : Ravi Devarasetty
Book Image

Zscaler Cloud Security Essentials

By: Ravi Devarasetty

Overview of this book

Many organizations are moving away from on-premises solutions to simplify administration and reduce expensive hardware upgrades. This book uses real-world examples of deployments to help you explore Zscaler, an information security platform that offers cloud-based security for both web traffic and private enterprise applications. You'll start by understanding how Zscaler was born in the cloud, how it evolved into a mature product, and how it continues to do so with the addition of sophisticated features that are necessary to stay ahead in today's corporate environment. The book then covers Zscaler Internet Access and Zscaler Private Access architectures in detail, before moving on to show you how to map future security requirements to ZIA features and transition your business applications to ZPA. As you make progress, you'll get to grips with all the essential features needed to architect a customized security solution and support it. Finally, you'll find out how to troubleshoot the newly implemented ZIA and ZPA solutions and make them work efficiently for your enterprise. By the end of this Zscaler book, you'll have developed the skills to design, deploy, implement, and support a customized Zscaler security solution.
Table of Contents (15 chapters)
1
Section 1: Zscaler for Modern Enterprise Internet Security
8
Section 2: Zero-Trust Network Access (ZTNA) for the Modern Enterprise

Learning about the ZIA Firewall policy

Traditionally, physical firewalls have been in use for a very long time by enterprises. Firewalls limit unsolicited inbound traffic to an enterprise and keep track of the outbound data connections generated by end users and applications, and only allow them back in. These firewalls also perform additional functions such as NAT and protocol inspection.

Zscaler offers a basic and advanced cloud firewall capability that allows configuration of access control policies, as with a physical firewall. The basic firewall only allows you to create rules using source IP address, destination IP address, source port, destination port, and protocol. The advanced firewall offers the use of Zscaler default Network Services and Network Application definitions. It also allows the creation of custom services.

The Firewall policy consists of five main components—Firewall Control, NAT Control, DNS Control, FTP Control, and IPS Control. Let's now...