Configure the SPN target name validation level.

From Windows 7 Security Technical Implementation Guide

Part of SPN Target Name Validation Level

Associated with IA controls: ECSC-1

SV-25273r1_rule Configure the SPN target name validation level.

Vulnerability discussion

This setting helps prevent spoofing; ensuring that if a service principle name (SPN) is provided by the client, it is validated against the server’s list of SPNs.

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Configure the policy value for “Microsoft network server: Server SPN target name validation level” to “Accept if provided by client”.

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