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I have an NFS v4 server running on an Ubuntu box in my LAN and need to mount one of its shares onto a desktop running Windows 11 Pro (with Services for NFS enabled).

This is what I have on the Ubuntu box (NFS server):

/etc/exports:

/mnt/files 192.168.0.0/16(rw,sync,no_subtree_check)

/etc/passwd:

rodrix:x:1000:1000:Rodrix:/home/rodrix:/bin/bash

/etc/group:

rodrix:x:1000:
mynetwork:x:1002:rodrix

Permissions on /mnt/files/ directory: drwxrwxr-x 5 root mynetwork

I can mount the share on my Linux laptop and read + write without a problem (user ID is 1000 and belongs to the mynetwork group on that machine as well). On Windows 11 Pro, though, I can mount but can't write to the NFS share. Here's what I have on Windows:

C:\windows\system32\drivers\etc\passwd:

192.168.1.101\rodrix:x:1000:1000:My NFS user:C:\Users\rodrix

C:\windows\system32\drivers\etc\group:

192.168.1.101\mynetwork:x:1002:1000

I must be doing something wrong but can't really tell where: is it on the NFS share itself (Ubuntu box 192.168.1.101) or is it on the NFS client configs for Windows 11?

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  • Aside from the problem, my general impression is that Microsoft only cares the absolute bare minimum about their NFS client (even keeping it far behind their own NFS server), and you'd have much better luck serving SMBv3 from Ubuntu instead...
    – grawity_u1686
    Commented Apr 28, 2023 at 4:43
  • I got it to work with the passwd file, but I have to agree with you about SMB being better suited for Windows clients. In an ideal world, I'd like to do NFS from WSL2, but I've already wasted too much time trying to get that to work without luck. [Topic for another SU question, for sure.]
    – Rodrix
    Commented Apr 29, 2023 at 18:18

2 Answers 2

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That is NFSv3 not NFSv4. As far as I can tell, the latter is not supported by Windows 7..11, only Windows Server.

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Answering my own question, the issue was just syntax. There should be no domain name in the passwd file on Windows (C:\windows\system32\drivers\etc\passwd). So, instead of this:

192.168.1.101\rodrix:x:1000:1000:My NFS user:C:\Users\rodrix

It should be just this:

rodrix:x:1000:1000:My NFS user:C:\Users\rodrix

As for the group file (C:\windows\system32\drivers\etc\group), it seems to be ignored by Windows, but I can live with that.

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