User authentication systems
A user authentication system is a security feature that
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verifies user identities through external servers such as TACACS+, LDAP, or RADIUS,
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centralizes account and role management across the organization, and
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enables administrators to enforce consistent access policies for all users.
Best practice for external server changes
Crosswork Network Controller supports configuration of up to 5 external authentication servers. When making changes to authentication server settings, observe the following recommendations:
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Perform all server additions, updates, or deletions in a single planned session to minimize user login disruptions.
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Ensure you have appropriate permissions before attempting to configure or delete external authentication servers.
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Wait a few minutes between consecutive changes to AAA server settings to avoid causing authentication errors or external login failures.
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Give write permission for remote authentication server APIs only to users who are authorized to manage or delete external authentication servers.
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After updating external server configuration in geo-redundant deployments, restart any standby appliance services as instructed by the documentation.
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Remember that changes to external authentication servers immediately affect all new user logins.

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