Gartner Research

How to Implement Network Access Control in Three Phases

Published: 09 April 2019

ID: G00377878

Analyst(s): Claudio Neiva, Lawrence Orans, John Watts


Network access control projects often start with device posture and access enforcement as objectives, but fail to reach their desired goals. Security and risk management leaders who break NAC implementations into three phases, with reasonable milestones, can speed implementation and achieve success.

Table Of Contents
  • Key Challenges



  • Phase 1: Governance and Discovery
    • Preconnect Versus Postconnect Authentication
    • Agent-Based or Agentless Device Profiling
  • Phase 2: Authentication and Process
    • Guilty-Until-Proven-Innocent Authentication Recommendation
    • Innocent-Until-Proven-Guilty Authentication Recommendations
    • Establishing Processes
  • Phase 3: Policy and Operations
    • Segregation of Authorized Versus Unauthorized Devices
    • Guest Access Management
    • Quarantine Devices
    • Configuration Guides for Endpoints, Supplicants and Network Equipment
    • Troubleshooting Guides for All Three Layers of Configuration: Endpoint, Network Devices and NAC Solutions
    • Self-Service Solutions
    • Sponsor Training

Gartner Recommended Reading

©2020 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner is a registered trademark of Gartner, Inc. and its affiliates. This publication may not be reproduced or distributed in any form without Gartner’s prior written permission. It consists of the opinions of Gartner’s research organization, which should not be construed as statements of fact. While the information contained in this publication has been obtained from sources believed to be reliable, Gartner disclaims all warranties as to the accuracy, completeness or adequacy of such information. Although Gartner research may address legal and financial issues, Gartner does not provide legal or investment advice and its research should not be construed or used as such. Your access and use of this publication are governed by Gartner’s Usage Policy. Gartner prides itself on its reputation for independence and objectivity. Its research is produced independently by its research organization without input or influence from any third party. For further information, see Guiding Principles on Independence and Objectivity.

Already have a Gartner Account?

Purchase this Document

To purchase this document, you will need to register or sign in above

Become a client

Learn how to access this content as a Gartner client.