Apr 18, 2018 Describes how to resolve a problem that occurs when SMB signing is disabled for the Workstation or Server service on a domain controller, but SMB signing is required for the Server or Workstation service on the same domain controller. This problem occurs in Windows Small Business Server 2003, Windows Server 2003, and Windows 2000 Server. Connecting to SMB shares with Mac OS X. This tutorial will walk you through connecting your Macs to SMB (Server Message Block) shares, hosted on Windows Servers, Windows Desktops, or network attached storage devices. SMB 2.0 was introduced in Windows Server 2008 and Windows Vista. Older clients, such as computers running Windows Server 2003 or Windows XP, do not support SMB 2.0; and therefore, they will not be able to access file shares or print shares if the SMB 1.0 server is disabled.
When you store files in iCloud Drive, you can share them with Mac computers, iOS devices, and Windows PCs. Learn about iCloud Drive.
External storage device
Apr 14, 2015 This prevents it from being listed via servername. It will force users to use domain amespace. Using DFS properly allows shares to be flexible in that they aren't server specific. You can use the namespace forever, no matter what server it's on, will always use the same name. No need to remember server names or ip addresses. Jun 23, 2013 When trying to connect to the SMB shares from a mac, if I connect using smb://Server1 then it 'connects' and shows no volumes available. However, if I connect with an IP Address or Server1.domain.net it will allow me to see all of the available shares.
With an external storage device, such as a hard drive or USB flash drive, you can transfer even large amounts of data from one computer to another. Just drag files to the storage device, then plug it into the other computer and copy them from there.
AirDrop
With AirDrop, you can send files wirelessly between Apple devices that are within about 30 feet (9 meters) of each other. Learn about AirDrop.
Target disk mode
Use target disk mode and the appropriate cable to make one Mac computer work like an external storage device for another connected Mac. Learn about target disk mode.
File Sharing
When you set up File Sharing on a Mac, other computers on the same network can connect to it, and you control which folders to share. Learn about File Sharing.
Email or chat
Use the Mail app to send files as an email attachment. If the attachment is too large to send as a regular attachment, the Mail Drop feature automatically uploads the attachment to iCloud so that the recipient can easily download it.
You also can also use the Messages app to send small files: just drag the file into your message.
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Applies to: Windows Server 2012 R2, Windows Server 2012, Windows Server 2016
This topic explains the SMB security enhancements in Windows Server 2012 R2, Windows Server 2012, and Windows Server 2016.
SMB Encryption
SMB Encryption provides end-to-end encryption of SMB data and protects data from eavesdropping occurrences on untrusted networks. You can deploy SMB Encryption with minimal effort, but it may require small additional costs for specialized hardware or software. It has no requirements for Internet Protocol security (IPsec) or WAN accelerators. SMB Encryption can be configured on a per share basis or for the entire file server, and it can be enabled for a variety of scenarios where data traverses untrusted networks.
Note
SMB Encryption does not cover security at rest, which is typically handled by BitLocker Drive Encryption.
SMB Encryption should be considered for any scenario in which sensitive data needs to be protected from man-in-the-middle attacks. Possible scenarios include:
Microsoft Smb Domain Server Mac Free
An information worker's sensitive data is moved by using the SMB protocol. SMB Encryption offers an end-to-end privacy and integrity assurance between the file server and the client, regardless of the networks traversed, such as wide area network (WAN) connections that are maintained by non-Microsoft providers.
SMB 3.0 enables file servers to provide continuously available storage for server applications, such as SQL Server or Hyper-V. Enabling SMB Encryption provides an opportunity to protect that information from snooping attacks. SMB Encryption is simpler to use than the dedicated hardware solutions that are required for most storage area networks (SANs).
Important
You should note that there is a notable performance operating cost with any end-to-end encryption protection when compared to non-encrypted.
Enable SMB Encryption
You can enable SMB Encryption for the entire file server or only for specific file shares. Use one of the following procedures to enable SMB Encryption:
Enable SMB Encryption with Windows PowerShell
To enable SMB Encryption for an individual file share, type the following script on the server:
To enable SMB Encryption for the entire file server, type the following script on the server:
To create a new SMB file share with SMB Encryption enabled, type the following script:
Enable SMB Encryption with Server Manager
In Server Manager, open File and Storage Services.
Select Shares to open the Shares management page.
Right-click the share on which you want to enable SMB Encryption, and then select Properties.
On the Settings page of the share, select Encrypt data access. Remote file access to this share is encrypted.
Considerations for deploying SMB Encryption
By default, when SMB Encryption is enabled for a file share or server, only SMB 3.0 clients are allowed to access the specified file shares. This enforces the administrator's intent of safeguarding the data for all clients that access the shares. However, in some circumstances, an administrator may want to allow unencrypted access for clients that do not support SMB 3.0 (for example, during a transition period when mixed client operating system versions are being used). To allow unencrypted access for clients that do not support SMB 3.0, type the following script in Windows PowerShell:
The secure dialect negotiation capability described in the next section prevents a man-in-the-middle attack from downgrading a connection from SMB 3.0 to SMB 2.0 (which would use unencrypted access). However, it does not prevent a downgrade to SMB 1.0, which would also result in unencrypted access. To guarantee that SMB 3.0 clients always use SMB Encryption to access encrypted shares, you must disable the SMB 1.0 server. (For instructions, see the section Disabling SMB 1.0.) If the –RejectUnencryptedAccess setting is left at its default setting of $true, only encryption-capable SMB 3.0 clients are allowed to access the file shares (SMB 1.0 clients will also be rejected).
Note
SMB Encryption uses the Advanced Encryption Standard (AES)-CCM algorithm to encrypt and decrypt the data. AES-CCM also provides data integrity validation (signing) for encrypted file shares, regardless of the SMB signing settings. If you want to enable SMB signing without encryption, you can continue to do this. For more information, see The Basics of SMB Signing.
You may encounter issues when you attempt to access the file share or server if your organization uses wide area network (WAN) acceleration appliances.
With a default configuration (where there is no unencrypted access allowed to encrypted file shares), if clients that do not support SMB 3.0 attempt to access an encrypted file share, Event ID 1003 is logged to the Microsoft-Windows-SmbServer/Operational event log, and the client will receive an Access denied error message.
SMB Encryption and the Encrypting File System (EFS) in the NTFS file system are unrelated, and SMB Encryption does not require or depend on using EFS.
SMB Encryption and the BitLocker Drive Encryption are unrelated, and SMB Encryption does not require or depend on using BitLocker Drive Encryption.
Secure dialect negotiation
SMB 3.0 is capable of detecting man-in-the-middle attacks that attempt to downgrade the SMB 2.0 or SMB 3.0 protocol or the capabilities that the client and server negotiate. When such an attack is detected by the client or the server, the connection is disconnected and event ID 1005 is logged in the Microsoft-Windows-SmbServer/Operational event log. Secure dialect negotiation cannot detect or prevent downgrades from SMB 2.0 or 3.0 to SMB 1.0. Because of this, and to take advantage of the full capabilities of SMB Encryption, we strongly recommend that you disable the SMB 1.0 server. For more information, see Disabling SMB 1.0.
The secure dialect negotiation capability that is described in the next section prevents a man-in-the-middle attack from downgrading a connection from SMB 3 to SMB 2 (which would use unencrypted access); however, it does not prevent downgrades to SMB 1, which would also result in unencrypted access. For more information on potential issues with earlier non-Windows implementations of SMB, see the Microsoft Knowledge Base.
New signing algorithm
SMB 3.0 uses a more recent encryption algorithm for signing: Advanced Encryption Standard (AES)-cipher-based message authentication code (CMAC). SMB 2.0 used the older HMAC-SHA256 encryption algorithm. AES-CMAC and AES-CCM can significantly accelerate data encryption on most modern CPUs that have AES instruction support. For more information, see The Basics of SMB Signing.
Disabling SMB 1.0
The legacy computer browser service and Remote Administration Protocol features in SMB 1.0 are now separate, and they can be eliminated. These features are still enabled by default, but if you do not have older SMB clients, such as computers running Windows Server 2003 or Windows XP, you can remove the SMB 1.0 features to increase security and potentially reduce patching.
Note
SMB 2.0 was introduced in Windows Server 2008 and Windows Vista. Older clients, such as computers running Windows Server 2003 or Windows XP, do not support SMB 2.0; and therefore, they will not be able to access file shares or print shares if the SMB 1.0 server is disabled. In addition, some non-Microsoft SMB clients may not be able to access SMB 2.0 file shares or print shares (for example, printers with “scan-to-share” functionality).
Before you start disabling SMB 1.0, you'll need to find out if your SMB clients are currently connected to the server running SMB 1.0. To do this, enter the following cmdlet in Windows PowerShell:
Mac Smb Share
Note
You should run this script repeatedly over the course of a week (multiple times each day) to build an audit trail. You could also run this as a scheduled task.
To disable SMB 1.0, enter the following script in Windows PowerShell:
Note
If an SMB client connection is denied because the server running SMB 1.0 has been disabled, event ID 1001 will be logged in the Microsoft-Windows-SmbServer/Operational event log.
More information
Connect To Mac Smb
Here are some additional resources about SMB and related technologies in Windows Server 2012.