mirror of
https://github.com/MicrosoftDocs/windows-itpro-docs.git
synced 2025-06-06 17:47:21 +00:00
84 lines
3.5 KiB
Markdown
84 lines
3.5 KiB
Markdown
---
|
||
title: Microsoft network client Send unencrypted password to third-party SMB servers (Windows 10)
|
||
description: Describes the best practices, location, values, policy management and security considerations for the Microsoft network client Send unencrypted password to third-party SMB servers security policy setting.
|
||
ms.assetid: 97a76b93-afa7-4dd9-bb52-7c9e289b6017
|
||
ms.prod: w10
|
||
ms.mktglfcycl: deploy
|
||
ms.sitesec: library
|
||
ms.pagetype: security
|
||
author: brianlic-msft
|
||
---
|
||
|
||
|
||
# Microsoft network client: Send unencrypted password to third-party SMB servers
|
||
|
||
**Applies to**
|
||
- Windows 10
|
||
|
||
Describes the best practices, location, values, policy management and security considerations for the **Microsoft network client: Send unencrypted password to third-party SMB servers** security policy setting.
|
||
|
||
## Reference
|
||
|
||
The Server Message Block (SMB) protocol provides the basis for file and print sharing and many other networking operations, such as remote Windows administration. This policy setting allows or prevents the SMB redirector to send plaintext passwords to a non-Microsoft server service that does not support password encryption during authentication.
|
||
|
||
### Possible values
|
||
|
||
- Enabled
|
||
|
||
The Server Message Block (SMB) redirector is allowed to send plaintext passwords to a non-Microsoft server service that does not support password encryption during authentication.
|
||
|
||
- Disabled
|
||
|
||
The Server Message Block (SMB) redirector only sends encrypted passwords to non-Microsoft SMB server services. If those server services do not support password encryption, the authentication request will fail.
|
||
|
||
- Not defined
|
||
|
||
### Best practices
|
||
|
||
- It is advisable to set **Microsoft network client: Send unencrypted password to connect to third-party SMB servers** to Disabled.
|
||
|
||
### Location
|
||
|
||
Computer Configuration\\Windows Settings\\Security Settings\\Local Policies\\Security Options
|
||
|
||
### Default values
|
||
|
||
The following table lists the actual and effective default values for this policy. Default values are also listed on the policy’s property page.
|
||
|
||
| Server type or GPO | Default value |
|
||
| - | - |
|
||
| Default Domain Policy| Not defined|
|
||
| Default Domain Controller Policy | Not defined|
|
||
| Stand-Alone Server Default Settings | Disabled|
|
||
| DC Effective Default Settings | Disabled|
|
||
| Member Server Effective Default Settings| Disabled|
|
||
| Client Computer Effective Default Settings | Disabled|
|
||
|
||
## Policy management
|
||
|
||
This section describes features and tools that are available to help you manage this policy.
|
||
|
||
### Restart requirement
|
||
|
||
None. Changes to this policy become effective without a device restart when they are saved locally or distributed through Group Policy.
|
||
|
||
## Security considerations
|
||
|
||
This section describes how an attacker might exploit a feature or its configuration, how to implement the countermeasure, and the possible negative consequences of countermeasure implementation.
|
||
|
||
### Vulnerability
|
||
|
||
If you enable this policy setting, the server can transmit plaintext passwords across the network to other computers that offer SMB services. These other devices might not use any of the SMB security mechanisms that are included with Windows Server 2003 or later.
|
||
|
||
### Countermeasure
|
||
|
||
Disable the **Microsoft network client: Send unencrypted password to connect to third-party SMB servers** setting.
|
||
|
||
### Potential impact
|
||
|
||
Some older applications may not be able to communicate with the servers in your organization by means of the SMB protocol.
|
||
|
||
## Related topics
|
||
|
||
- [Security Options](security-options.md)
|