SMB Service Screen

Use the Services SMB screen to configure 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 NamePopulates with the original host name of the system truenas. 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 unconfigured, TrueNAS uses Active Directory or LDAP to detect and select the correct workgroup. Active Directory or LDAP must be active for TrueNAS to do this.
DescriptionOptional. Enter a server description.
Enable SMB1 supportSelect to allow legacy SMB clients to connect to the server. Note that SMB1 is being deprecated. The recommendation is to upgrade the client OS. The OS upgrade should support modern versions of the SMB protocol.
NTLMv1 AuthSelect to allow smbd(8) attempts to authenticate users with NTLMv1 encryption. NTLMv1 is not secure and is a vulnerability. NTLMv1 authentication is off by default. This setting allows backward compatibility with older versions of Windows. It is not recommended. Do not use 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. Logs error and warning level messages by default.
Use Syslog OnlySelect to log authentication failures in /var/log/messages instead of the default /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. Leave checkbox clear when Vista or Windows 7 machines are present.
Enable Apple SMB2/3 Protocol ExtensionsSelect to allow macOS to use these protocol extensions. Improves the performance and behavioral characteristics of SMB shares. Required for Apple Time Machine support.
Administrators GroupSelect an option from the dropdown list. Members of this group are local admins. Local admins have privileges to take ownership of any file in the SMB share. They can reset permissions. Local admins can 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 must have permissions to the shared pool or dataset. To adjust permissions, edit the dataset Access Control List (ACL). Add a new entry for the selected guest account, and configure the permissions in that entry. Deleting the selected user in Guest Account resets the field to nobody.
File MaskOverrides default file creation mask of 0666. File creation mask 0666 creates files with read and write access for everybody.
Directory MaskOverrides default directory creation mask of 0777. Directory creation mask 0777 grants directory read, write and execute access for everybody.
Bind IP AddressesSelect from the dropdown list. These are the static IP addresses which SMB listens on for connections. If not selected, 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.