Kerberos encryption types will be configured to prevent the use of DES encryption suites.

From Windows Server 2008 R2 Domain Controller Security Technical Implementation Guide

Associated with IA controls: ECSC-1

SV-32706r1_rule Kerberos encryption types will be configured to prevent the use of DES encryption suites.

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This setting configures a minimum encryption type for Kerberos preventing the use of the DES encryption suites.

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Configure the policy value for “Network Security: Configure encryption types allowed for Kerberos” to “Enabled” with only the following selected: RC4_HMAC_MD5 AES128_HMAC_SHA1 AES256_HMAC_SHA1 Future encryption types

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