Network Access Control For Dummies®

15.2. Leverage Existing Authentication

Companies typically have one or more authentication sources available for users. The most common of these sources include Active Directory, LDAP, and RADIUS. To speed up your deployment, you can leverage your network's existing authentication, instead of creating a new authentication service.

Here are some of the users that you may want to authenticate:

• Guest users

• Corporate users

• Contractors

• Devices

If your authentication source is missing necessary access control information, such as groups, you can more easily add that role or group information to what you have than create an entirely new infrastructure.

If you're leveraging an existing authentication source, plan for the extra authentication load that NAC will add to your authentication servers.