Windows Server 2019 must restrict anonymous access to Named Pipes and Shares.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-205725 | WN19-SO-000250 | SV-205725r958524_rule | High |
| Description |
| Allowing anonymous access to named pipes or shares provides the potential for unauthorized system access. This setting restricts access to those defined in "Network access: Named Pipes that can be accessed anonymously" and "Network access: Shares that can be accessed anonymously", both of which must be blank under other requirements. |
| STIG | Date |
| Microsoft Windows Server 2019 Security Technical Implementation Guide | 2025-05-23 |
Details
| Check Text (C-5990r355093_chk) |
| If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanManServer\Parameters\ Value Name: RestrictNullSessAccess Value Type: REG_DWORD Value: 0x00000001 (1) |
| Fix Text (F-5990r355094_fix) |
| Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Restrict anonymous access to Named Pipes and Shares" to "Enabled". |