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SMB Service Screen

  3 minute read.

Last Modified 2022-05-11 11:36 EDT

Use the Services SMB screen to configured SMB service settings. Unless a specific setting is needed or configuring for a specific network environment, it is recommended to use the default settings for the SMB service.


Basic Options

NetBIOS NameAutomatically populated with the original host name of the system truenas. This name is limited to 15 characters and cannot be the same name in Workgroup.
NetBIOS AliasEnter any aliases, separated by spaces. Each alias can be up to 15 characters long.
WorkgroupValue must match Windows workgroup name. If this is unconfigured and Active Directory or LDAP are active, TrueNAS detects and sets the correct workgroup from these services.
DescriptionOptional. Enter a server description.
Enable SMB1 supportSelect to allow legacy SMB clients to connect to the server. Note that SMB1 is being deprecated and it is advised to upgrade clients to operating system versions that support modern versions of the SMB protocol.
NTLMv1 AuthSelect to allow smbd(8) attempts to authenticate users with the insecure and vulnerable NTLMv1 encryption. Off by default. This setting allows backward compatibility with older versions of Windows, but is not recommended and should not be used on untrusted networks.

Advanced Options


Unix CharsetSelect an option from the dropdown list. Default is UTF-8 which supports all characters in all languages.
Log LevelSelect an option from the dropdown list. Options are None, Minimum, Normal, Full or Debug. Records SMB service messages up to the specified log level. By default, error and warning level messages are logged.
Use Syslog OnlySelect to log authentication failures in /var/log/messages instead of the default of /var/log/samba4/log.smbd.
Local MasterSelect to determine if the system participates in a browser election. Leave checkbox clear when the network contains an AD or LDAP server, or when Vista or Windows 7 machines are present.
Enable Apple SMB2/3 Protocol ExtensionsSelect to allow these protocol extensions to be used by macOS to improve the performance and behavioral characteristics of SMB shares. This is required for Apple Time Machine support.
Administrators GroupSelect an option from the dropdown list. Options include local admins and automatically have privileges to take ownership of any file in an SMB share, reset permissions, and administer the SMB server through the Computer Management MMC snap-in.
Guest AccountSelect an account to use for guest access from the dropdown list. Default is nobody. The selected account is required to have permissions to the shared pool or dataset. To adjust permissions, edit the dataset Access Control List (ACL), add a new entry for the chosen guest account, and configure the permissions in that entry. If the selected user in Guest Account is deleted the field resets to nobody.
File MaskOverrides default file creation mask of 0666 which creates files with read and write access for everybody.
Directory MaskOverrides default directory creation mask of 0777 which grants directory read, write and execute access for everybody.
Bind IP AddressesSelect the static IP addresses which SMB listens on for connections from the dropdown list. Leave unselected defaults to listen on all active interfaces.
Auxiliary ParametersEnter additional smb.conf options. See the Samba Guide for more information on these settings. To log more details when a client attempts to authenticate to the share, add log level = 1, auth_audit:5.

Additional Information

SMB Share Screen

SMB Service Screen

SMB Share Creation

Managing SMB Shares