SMB Service Screen

The SMB Services screen displays setting options to configure TrueNAS SMB settings to fit your use case. The Basic Options settings continue to display after selecting the Advanced Options screen.

SMB Service Basic Options
Figure 1: SMB Service Basic Options

Click Save or Cancel to close the configuration screen and return to the Services screen.

Basic Options Settings

NetBIOS NameAutomatically populated with the original system host name. The name is limited to 15 characters and cannot be the Workgroup name.
NetBIOS AliasEnter any alias name up to 15 characters long. Separate alias names with a space between them.
WorkgroupEnter a name that matches the Windows workgroup name. If you do not configure a Workgroup, but Active Directory or LDAP is active, TrueNAS detects and sets the correct workgroup from these services.
Description(Optional) Enter any notes or descriptive details about the service configuration.
Enable SMB1 supportSelect to allow legacy SMB1 clients to connect to the server. Note: SMB1 is deprecated. We advise you to upgrade clients to operating system versions that support modern SMB protocol versions.
NTLMv1 AuthOff by default. Select to allow smbd attempts to authenticate users with the insecure and vulnerable NTLMv1 encryption. This setting allows backward compatibility with older versions of Windows, but we don’t recommend it. Do not use on untrusted networks.

Advanced Options Settings

The Basic Options settings also display on the Advanced Options settings screen with the Other Options settings.

SMB Service Advanced Options
Figure 2: SMB Service Advanced Options
UNIX CharsetSelect the character set to use internally from the dropdown list of options. UTF-8 is standard for most systems as it supports all characters in all languages.
Log LevelRecord SMB service messages up to the specified log level from the dropdown list. Options are None, Minimum, Normal, full and Debug. By default, TrueNAS logs error and warning-level messages. We don’t recommend using a log level above Minimum for production servers.
Use Syslog OnlySelect to log authentication failures in /var/log/messages instead of the default /var/log/samba4/log.smbd.
Local MasterSelected by default and determines if the system participates in a browser election. Clear this checkbox 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 MacOS to use these protocol extensions to improve the performance and behavioral characteristics of SMB shares. TrueNAS requires Apple SMB2/3 Protocol Extensions for Time Machine support.
MultichannelSMB multichannel allows servers to use multiple network connections simultaneously by combining the bandwidth of several network interface cards (NICs) for better performance. SMB multichannel does not function if you combine NICs into a LAGG.
Administrators GroupEnter or select members from the dropdown list. Members of this group are local administrators 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.
SMB Service Advanced Options (continued)
Figure 3: SMB Service Advanced Options (continued)
Guest AccountSelect the account for guest access from the dropdown list. The default is nobody. The selected account must have permission for 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 you delete the selected Guest Account, the field resets to nobody.
File MaskOverrides default 0666 file creation mask, which creates files with read and write access for everybody.
Directory MaskOverrides default directory creation mask of 0777, which grants everyone directory read, write, and execute access.
Bind IP AddressesSelect static IP addresses that SMB listens on for connections from the dropdown list. Leaving all unselected defaults to listening on all active interfaces.
Auxiliary ParametersEnter additional smb.conf options. Refer to the Samba Guide for more information on these settings. You can use Auxiliary Parameters to override the default SMB server configuration, but such changes could adversely affect SMB server stability or behavior. To log more details when a client attempts to authenticate to the share, add log level = 1, auth_audit:5.