Zscaler ZTE

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Lesson 1: What is a digital footprint?

由Summer Ly

CasperResearch

由Vlad Zamfir

AWS Well-Architected Framework

由Yasser Moghrabiah

Enterprise Architect

由José Arévalo

Zscaler ZTE

ZDX

Connect Users to ZTE

ZPA

Identity

App Policy

Private Apps

Supporting Users

inTune

InTune for IOS using SCEP

IOS v13 enabled SCEP with SSO (extension)

KDC discovery (location based) enables tighter scope

IOS v8 enabled SCEP with SSO

Simple Certificate Enrollment Protocol

Admin SSO

Azure AD with SCIM

Okta

Azure AD

Test config, import attributes

3 Complete IdP setup in ZPA

2 Add ZPA Enterprise App in AAD

1 Add new IdP in ZPA for Use auth

Features

User Portal

Machine Tunnels

Browser Access

CNAME record

BA certificate

Best Practice & Troubleshooting

Principles & Evolution

Access Policy Building blocks

Operands

ZCC / BA

Select SAML / SCIM attribute values

Select App Segments

Select Segment Groups

Select ZCC posture profiles

Conditions

SAML / SCIM attributes

Segment Groups

App Segments

Client Connector Posture profiles

Client Connector Trusted Networks

Machine Groups

Client Types

Architecture

Public Service Edge

Private Service Edge

Configuration

Recommendation

create a subordinate CA for the Private Service Edges

use the same root CA as the one used for the Client Connector users

Requirements

Private to Public

Multiple trusted networks

Failover

Relay

Hybrid

External Users/Branch Office

Internal Users

Activation

Common use cases

Branch

Local SE

Hybrid workforce

On-prem

2

1

Why?

BYOE

Process

4 Upload signed CSRs to ZPA

upload signed CSR for ZCC

upload signed CSR for AppConnector

3 submit CSRs to root CA for signing

each CSR (ZCC, App) to be signed by CA

2 generate CSRs for client and App connectors (each)

1 upload root CA certificate

upload the cert into ZPA instance

export root CA cert from enterprise private CA

Double Encryption

Useful if legacy apps do not encrypt data transport (ie telnet, http)

used when traffic is encrypted as it transits ZPA enfrastructure

use enterprise CA to establish trust for ZPA connections

Subordinate CAs created in ZPA (signed by Enterprise private root CA)

The private keys never leave the ZPA CAs

create subsidiary CA for App Connectors

create subsidiary CA for Client Connectors

Bring Your Own Encryption

Best Practices

Privacy

BranchConnectors

Server to Server/Client

AppConnectors

Installation (Azure)

Deployment

ZIA tunnels

IPSEC / GRE

DMZ with split DNS

DMZ

Explicit Proxy

Concentrates and terminates the ZCC tunnels in the DC

ZCC Client to Server via the AppConnector

ZIA

Security

Monitoring

Issues

Policy

Troubleshooting

User Auth

Internet

Network

3 Authentication

Location

User

Upon sucessful authentication, appropriate policy is enforced

User is challenged for authentication

2 Policy Configuration

Policies

Administrator creates policy for groups or users

1 Provisioning

Users, groups and departments are provisioned on the cloud

Administrator configures authentication profile

departments

used for policies and reporting

users can only belong to one department

no limit to users in a department

groups

users can belong to <128 groups

no limit to users in a group

Methods

manual

Zscaler hosted DB

CSV import

SAML auto-provisioning

LDAP bind

Zscaler Authentication Bridge (ZAB)

Fundamentals

Access Control

File Type

URL & Cloud App

Web Security

Cloud Sandbox

Cloud Firewall

ATP

Malware Protection

Data Protection

CASB

DLP

HA

Traffic Forwarding

Explicit Proxy / Mobile

PAC

ZCC

Transparent Proxy / Fixed

Surrogate IP

dynamic address

Dedicated Proxy port

IPSEC

Dead Peer Detection (DPD)

CIA

Authentication

PSK

Integrity

Confidentiality

IKE

Phase 2

set up SAs

PFS

renewal of SA keys

negotiate parameters

Phase 1

setup secure channel for Phase 2

authenticate peers

< 400 Mbps

static address

GRE

Technicals

GRE MSS = GRE MTU(1476) - IP(20) - TCP(20) = 1436

GRE MTU = WAN link MTU(1500) - IP(20) - GRE(4) = 1476

WAN link MSS = WAN link MTU - IP(20) - TCP(20) = 1460

WAN link MTU = 1500

no mechanism for tunnel failures

ensure no NAT, otherwise < 250 Mbps

<1 Gbps

Recommended

enable User authentication

enable Surrogate IP

tunnel web traffic via GRE without NAT

implement monitoring and automated tunnel failover

two GRE tunnels to two different DC in active/standby