Telefonica UK Limited

Zscaler Web Security from O2

Zscaler is a global cloud-based information security company that provides Internet security, web security, next generation firewalls, sandboxing, SSL inspection, antivirus, vulnerability management and granular control of user activity in cloud computing, mobile and Internet of things environments.


  • Cloud Security
  • Secure Web Gateway
  • Cloud Based Internet Gateway
  • Next Generation Firewall
  • DLP
  • APT - Cloud Sandboxing
  • Wifi Security


  • Protects all internet traffic on all devices
  • SSL Inspection
  • Visibility of end user activities
  • Security Analytics
  • Full Remote Location Protection
  • Reduced Management Overhead
  • Protect against Data Exfiltration
  • Compliance Enforcement
  • Identify Compromised Endpoints
  • Stop Infections including Zero Day Attacks


£6.88 per user per year

  • Free trial available

Service documents


G-Cloud 11

Service ID

8 2 5 1 5 7 3 9 5 9 9 7 9 3 8


Telefonica UK Limited

Neil Cruden


Service scope

Service scope
Software add-on or extension No
Cloud deployment model Public cloud
Service constraints None specified
System requirements None

User support

User support
Email or online ticketing support Email or online ticketing
Support response times Standard, Premium and Premium Plus; Side by side comparision available at
User can manage status and priority of support tickets No
Phone support Yes
Phone support availability 24 hours, 7 days a week
Web chat support No
Onsite support No
Support levels Standand, Premium, Premium Plus (All 24/7, level depends on the response time SLA)
Support available to third parties Yes

Onboarding and offboarding

Onboarding and offboarding
Getting started Z-Scaler Deployment Advisory Services
Service documentation Yes
Documentation formats HTML
End-of-contract data extraction Not applicable - no persistent data maintained online.
End-of-contract process Realtime service stops

Using the service

Using the service
Web browser interface Yes
Supported browsers
  • Internet Explorer 10
  • Internet Explorer 11
  • Microsoft Edge
  • Firefox
  • Chrome
  • Safari 9+
  • Opera
Application to install Yes
Compatible operating systems Other
Designed for use on mobile devices Yes
Differences between the mobile and desktop service None.
Service interface No
What users can and can't do using the API API is available on request, documentation can be found at
API documentation Yes
API documentation formats HTML
API sandbox or test environment No
Customisation available Yes
Description of customisation End user notifications, policies, reporting


Independence of resources Automated scaling capability.


Service usage metrics Yes
Metrics types Service is monitored aggressively for quality by external 3rd party with public domain reporting.
Reporting types Reports on request


Supplier type Reseller providing extra support
Organisation whose services are being resold Z-Scaler

Staff security

Staff security
Staff security clearance Other security clearance
Government security clearance None

Asset protection

Asset protection
Knowledge of data storage and processing locations Yes
Data storage and processing locations European Economic Area (EEA)
User control over data storage and processing locations No
Datacentre security standards Managed by a third party
Penetration testing frequency At least once a year
Penetration testing approach Another external penetration testing organisation
Protecting data at rest Scale, obfuscating techniques, or data storage sharding
Data sanitisation process No
Equipment disposal approach Complying with a recognised standard, for example CSA CCM v.30, CAS (Sanitisation) or ISO/IEC 27001

Data importing and exporting

Data importing and exporting
Data export approach Not applicable.
Data export formats Other
Other data export formats Not applicable.
Data import formats Other
Other data import formats Not applicable.

Data-in-transit protection

Data-in-transit protection
Data protection between buyer and supplier networks Other
Other protection between networks Zscaler Platform is a Security Platform.
Data protection within supplier network Other
Other protection within supplier network Zscaler Platform is a Sercurity Platform.

Availability and resilience

Availability and resilience
Guaranteed availability 99.999%, assured by contractual commitment
Approach to resilience N+1 fallover data-centers.
Outage reporting & email notifications

Identity and authentication

Identity and authentication
User authentication needed Yes
User authentication
  • Identity federation with existing provider (for example Google Apps)
  • Other
Other user authentication Only authenticated users will be able to use the service. Any not authenticated IP that tries to connect to the Zscaler service will be refused connection at a rate of 16 connections every 2 hours. Users will be authenticated via location or credentials (either hosted by Zscaler or logged in via an external SAML/LDAP IDP)
Access restrictions in management interfaces and support channels Production can only be accessed via Jump infrastructure. Jump infrastructure access requires the following:
1. Session being initiated from whitelisted IP Space
2. User having a valid OKTA account in corporate and password
3. User having a valid jump account and password
4. User having a secure token (Physical token)
5. User being member of specific group with their private key protected by passphrase

Furthermore, production access is restricted to specific commands executed based on user role and job function. For commands outside of regular day-to-day job function there is an escalation process to control ability to execute additional commands.
Access restriction testing frequency At least once a year
Management access authentication Other
Description of management access authentication Zscaler Cloud service is managed via a single web based (HTTPS) management UI. Authorised users can be created on the hosted DB or it can be integrated with a customer SAML solution for IDP initiated SSO authentication. SAML solutions can in turn support strong authentication, certificate based authentication etc. Admin access logs are available in the admin UI. Configuration audit logs can be exported to CSV format.

Audit information for users

Audit information for users
Access to user activity audit information Users have access to real-time audit information
How long user audit data is stored for Between 6 months and 12 months
Access to supplier activity audit information Users have access to real-time audit information
How long supplier audit data is stored for User-defined
How long system logs are stored for Between 6 months and 12 months

Standards and certifications

Standards and certifications
ISO/IEC 27001 certification Yes
Who accredited the ISO/IEC 27001 Brightline
ISO/IEC 27001 accreditation date 26/06/2014
What the ISO/IEC 27001 doesn’t cover The scope of the ISO/IEC 27001:2013 information security management system (ISMS) includes the Zscaler cloud operations
for its Security as a Service platform (including operations employees and network operations center) located in Zscaler’s
network operations center in San Jose, California, in accordance with the Statement of Applicability, dated April 21, 2014.
ISO 28000:2007 certification No
CSA STAR certification No
PCI certification No
Other security certifications No

Security governance

Security governance
Named board-level person responsible for service security Yes
Security governance certified Yes
Security governance standards ISO/IEC 27001
Information security policies and processes ISO/IEC 27001

Operational security

Operational security
Configuration and change management standard Supplier-defined controls
Configuration and change management approach Following industry best practices with ISO/IEC 27001 certification.
Vulnerability management type Supplier-defined controls
Vulnerability management approach Following industry best practices with ISO/IEC 27001 certification.
Protective monitoring type Supplier-defined controls
Protective monitoring approach Following industry best practices with ISO/IEC 27001 certification.
Incident management type Supplier-defined controls
Incident management approach Following industry best practices with ISO/IEC 27001 certification.

Secure development

Secure development
Approach to secure software development best practice Supplier-defined process

Public sector networks

Public sector networks
Connection to public sector networks No


Price £6.88 per user per year
Discount for educational organisations No
Free trial available Yes
Description of free trial We can offer a free 30-day evaluation.

Service documents

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