How to enable SMB V1 server on the newest (25.04.1)

TrueNAS General
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1

Hi everyone,

I’m trying to connect my TrueNAS system to an old Windows Server 2003 machine that still has some important data on it. Unfortunately, that machine only supports SMBv1, and I believe TrueNAS has it disabled by default.

I need to temporarily enable SMBv1 on TrueNAS just to migrate the data off the Windows 2003 server. I’ve looked through the SMB settings in the UI but I can’t figure out how to enable SMBv1 support on the server side.

System:
TrueNAS Community Edition 25.04.1
Windows Server 2003 (only supports SMBv1)

Questions:

  1. How can I enable SMBv1 server support on TrueNAS?

Any help or guidance would be greatly appreciated!

Thanks in advance!

2

From the GUI navigate into
→ Shares → (on the right of SMB) click on the 3 dot → Config Service

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after change, you will need to restart the SMB service

3

It’s not a SMB server issue, but rather a client issue. Server 2003 (Windows XP era) requires the active directory libraries / client in TrueNAS to use SMB1 (among other things) before we can even join the domain. This is all disabled by default for security reasons. We don’t expose these options in the UI and so user will need to do research and carefully tweak the SMB service smb_options in our config via the CLI. The simple fact of the matter is that no one should be running Server 2003 in production and we don’t really expose any options to enable / encourage it.