The SMB2 SET_INFO Request packet is sent by a client to setinformation on a file or underlying object store. This request consists of an SMB2 header, as specifiedin section 2.2.1, followed by this request structure.
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StructureSize
InfoType
FileInfoClass
BufferLength
BufferOffset
Reserved
AdditionalInformation
FileId
...
...
...
Buffer (variable)
...
StructureSize (2 bytes): The client MUST setthis field to 33, indicating the size of the request structure, not includingthe header. The client MUST set this field to this value regardless of how longBuffer[] actually is in the request being sent.
InfoType (1 byte): The type of informationbeing set. The valid values are as follows.
Value
Meaning
SMB2_0_INFO_FILE
0x01
The file information is being set.
SMB2_0_INFO_FILESYSTEM
0x02
The underlying object store information is being set.
SMB2_0_INFO_SECURITY
0x03
The security information is being set.
SMB2_0_INFO_QUOTA
0x04
The underlying object store quota information is being set.
FileInfoClass (1 byte): For setting fileinformation, this field MUST contain one of the followingFILE_INFORMATION_CLASS values, as specified in section 3.3.5.21.1 and [MS-FSCC]section 2.4:
For setting underlying objectstore information, this field MUST contain one of the following FS_INFORMATION_CLASSvalues, as specified in [MS-FSCC] section 2.5:
FileFsControlInformation
FileFsObjectIdInformation
For setting quota and securityinformation, this field MUST be 0.
BufferLength (4 bytes): The length, in bytes,of the information to be set.
BufferOffset (2 bytes): The offset, in bytes,from the beginning of the SMB2 header to the information to be set.<78>
Reserved (2 bytes): This field MUST NOT beused and MUST be reserved. The client MUST set this field to 0, and the serverMUST ignore it on receipt.
AdditionalInformation (4 bytes): Providesadditional information to the server.
If security information is being set, this valueMUST contain a 4-byte bit field of flags indicating what security attributesMUST be applied. For more information about security descriptors, see [MS-DTYP]section 2.4.6.
Value
Meaning
OWNER_SECURITY_INFORMATION
0x00000001
The client is setting the owner in the security descriptor of the file or named pipe.
GROUP_SECURITY_INFORMATION
0x00000002
The client is setting the group in the security descriptor of the file or named pipe.
The client is setting the system access control list in the security descriptor of the file or named pipe.
LABEL_SECURITY_INFORMATION
0x00000010
The client is setting the integrity label in the security descriptor of the file or named pipe.
ATTRIBUTE_SECURITY_INFORMATION
0x00000020
The client is setting the resource attribute in the security descriptor of the file or named pipe.
SCOPE_SECURITY_INFORMATION
0x00000040
The client is setting the central access policy of the resource in the security descriptor of the file or named pipe.
BACKUP_SECURITY_INFORMATION
0x00010000
The client is setting the backup operation information in the security descriptor of the file or named pipe.
For all other set requests, thisfield MUST be 0.
FileId (16 bytes): An SMB2_FILEID identifier ofthe file or named pipe on which to perform the set. Set operations forunderlying object store and quota information are directed to the volume onwhich the file resides.
Buffer (variable): A variable-length bufferthat contains the information being set for the request, as described by the BufferOffsetand BufferLength fields. Buffer format depends on InfoType andthe AdditionalInformation, as follows.
InfoType
AdditionalInformation
Buffer format specification
SMB2_0_INFO_FILE
See [MS-FSCC] section 2.4.
SMB2_0_INFO_FILESYSTEM
See [MS-FSCC] section 2.5.
SMB2_0_INFO_SECURITY
Any combination of the values:
OWNER_SECURITY_INFORMATION
GROUP_SECURITY_INFORMATION
LABEL_SECURITY_INFORMATION
DACL_SECURITY_INFORMATION
SACL_SECURITY_INFORMATION
The security descriptor data structure, as specified in [MS-DTYP] section 2.4.6, populated with the data specified by the AdditionalInformation value.
The SMB2 SET_INFO Request packet is sent by a client to set information on a file or underlying object store. This request consists of an SMB2 header, as specified in section 2.2. 1, followed by this request structure.
To enable SMBv2, you want to confirm your operating system can run it. Most Windows 10 operating systems can. Open the Powershell and type in Get-SmbServerConfiguration | Select EnableSMB2Protocol. You should receive a True in response, meaning you can run SMB2 on your computer.
The Server Message Block (SMB) Protocol Versions 2 and 3, hereafter referred to as "SMB 2 Protocol", is an extension of the original Server Message Block (SMB) Protocol (as specified in [MS-SMB] and [MS-CIFS]). Both protocols are used by clients to request file and print services from a server system over the network.
The SMB2 ERROR Response packet is sent by the server to respond to a request that has failed or encountered an error. This response is composed of an SMB2 Packet Header (section 2.2. 1) followed by this response structure.
First, the client (e.g., a user's computer, mobile device, or printer) sends an SMB request to the server to initiate a connection. The server receives this request and sends an SMB response back to the client.
Under the More Windows features panel, scroll to the SMB Direct selection and ensure it is checked. You may need to restart your Windows system after performing this change for it to take effect. The SMB 1.0 CIFS File Sharing choice, shown immediately above SMB Direct, should not be enabled.
The SMBv2 protocol was introduced in Windows Vista and Windows Server 2008, while the SMBv3 protocol was introduced in Windows 8 and Windows Server 2012. For more information about SMBv2 and SMBv3 capabilities, see the following articles: Server Message Block overview. What's New in SMB.
Windows Vista/Server 2008 and later operating systems use SMB2 when communicating with other machines also capable of using SMB2. SMB1 continues in use for connections with older versions of Windows, as well various vendors' NAS solutions. Samba 3.5 also includes experimental support for SMB2.
The SMB2 SET_INFO Request packet is sent by a client to set information on a file or underlying object store. This request consists of an SMB2 header, as specified in section 2.2. 1, followed by this request structure.
SMB2 is still fine and if disabled may cause some scanners to stop scan to folder and other options (and other devices might stop working as well as most have only just stopped using SMB1). Disable SMB1 first and check the effects. Some equipment such as printers may only work with SMB1 and are not upgradeable.
SMB uses either IP port 139 or 445. Port 139: SMB originally ran on top of NetBIOS using port 139. NetBIOS is an older transport layer that allows Windows computers to talk to each other on the same network. Port 445: Later versions of SMB (after Windows 2000) began to use port 445 on top of a TCP stack.
SMB 2.02 and later signing is controlled solely by being required or not. This setting is used when either the server or client requires SMB signing. Only if both have signing set to 0 will signing not occur.
Server Message Block version 2 and 3. SMB2 is a new version of the old Windows filesharing protocol SMB and is used for filesharing on modern and future Windows hosts. Windows 8 introduced several new features, so Microsoft has decided to bump the revision number up to SMB v3.
Click Options, then turn on “Share files and folders using SMB.” If you're sharing files with Windows computers, select the On checkbox for each user that needs to share files with a Windows computer, then enter the password for that user's account. Click Done.
To enable SMB signing in Group Policy, perform the following steps: Select Start, type gpedit. msc, then hit Enter . In the Local Group Policy Editor, navigate to Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options.
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