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leandroaveiro

Member

From: Rochester, NY, USA

Registered: 2007-04-12

Posts: 47

[SOLVED] Accessing QEMU's built-in SMB server from Windows 11

Hi all,

I have a Windows 10 and a Windows 11 guest VMs. I am using the same command line to launch both. On Windows 10 I can read/write into the built-in SMB share at \\10.0.2.4\qemu while Windows 11 cannot find that location. I have an Internet connection on both VMs. Here is my starting command line:

qemu-system-x86_64 -enable-kvm -vga none -device qxl-vga,vgamem_mb=32 -device virtio-serial-pci -spice port=5930,disable-ticketing=on \
-device virtserialport,chardev=spicechannel0,name=com.redhat.spice.0 -chardev spicevmc,id=spicechannel0,name=vdagent -display spice-app \
-device ich9-usb-ehci1,id=usb \
-device ich9-usb-uhci1,masterbus=usb.0,firstport=0,multifunction=on \
-device ich9-usb-uhci2,masterbus=usb.0,firstport=2 \
-device ich9-usb-uhci3,masterbus=usb.0,firstport=4 \
-chardev spicevmc,name=usbredir,id=usbredirchardev1 -device usb-redir,chardev=usbredirchardev1,id=usbredirdev1 \
-chardev spicevmc,name=usbredir,id=usbredirchardev2 -device usb-redir,chardev=usbredirchardev2,id=usbredirdev2 \
-chardev spicevmc,name=usbredir,id=usbredirchardev3 -device usb-redir,chardev=usbredirchardev3,id=usbredirdev3 \
-nic user,id=nic0,smb=<share_path> \
-smp cores=4,threads=2,sockets=1 \
-m 8G -cpu host,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time windows.img

I have followed the wiki's instructions and made sure NetBIOS protocol is enabled, and just to be sure I have turned off the Windows Defender firewall with same results.

In Windows 11 I get a pop up message with "Windows can't find \\10.0.2.4\qemu. Check the spelling and try again."

I should mention that my Windows 11 is not activated. I couldn't get Windows 10 to upgrade to Windows 11 on its own so I did a new Windows 11 installation, but my OEM license key did not work for Win 11.

Thank you for the help and please let me know what other data I can post here to help diagnose the situation.

Last edited by leandroaveiro (2025-02-05 19:17:57)

leandroaveiro

Member

From: Rochester, NY, USA

Registered: 2007-04-12

Posts: 47

Re: [SOLVED] Accessing QEMU's built-in SMB server from Windows 11

I gave trying to make this work and instead I set up a regular smb share and access it over \\10.0.2.2. Still puzzled though as to why the same command line works with Win 10 and not Win 11.

hikmateustad

Member

Registered: 2022-01-23

Posts: 91

Re: [SOLVED] Accessing QEMU's built-in SMB server from Windows 11

Possibly there are differences in add/remove windows features in Win10 and Win11. Something esoteric might be enabled in 10 and not 11.

stone_yellow_marshal

Member

Registered: 2024-11-26

Posts: 2

Re: [SOLVED] Accessing QEMU's built-in SMB server from Windows 11

I met the same problem as you when my guest machine is windows 11 lot ltsc. But I made it connected using \\10.0.2.2\share when my host ran a normal smb server while \\10.0.2.4\qemu still failed.

and what I have done to my success on windows 10 ltsc 2021 is as followings:
1.  control panel --> programs --> programs and features --> turn windos features on or off --> SMB 1.0/CIFS File Sharing Support
2.  control panel --> network and sharissmng center --> change advanced sharing settings --> turn on network discovery & turn on file and printer sharing
3. gpedit.msc --> computer config --> administrative templates --> network
--> Lanman workstation --> enable insecure guest logons
4.  reboot

mtxn

Member

Registered: 2024-11-24

Posts: 1

Re: [SOLVED] Accessing QEMU's built-in SMB server from Windows 11

I met the same problem as you when my guest machine is windows 11 lot ltsc. But I made it connected using \\10.0.2.2\share when my host ran a normal smb server while \\10.0.2.4\qemu still failed.

and what I have done to my success on windows 10 ltsc 2021 is as followings:
1.  control panel --> programs --> programs and features --> turn windos features on or off --> SMB 1.0/CIFS File Sharing Support
2.  control panel --> network and sharissmng center --> change advanced sharing settings --> turn on network discovery & turn on file and printer sharing
3. gpedit.msc --> computer config --> administrative templates --> network
--> Lanman workstation --> enable insecure guest logons
4.  reboot

a different error message appeared and the following powershell command solved it:
Set-SmbClientConfiguration -RequireSecuritySignature $false

Last edited by mtxn (2026-01-02 04:42:16)

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 14,823

Re: [SOLVED] Accessing QEMU's built-in SMB server from Windows 11

Moderator Note
Please don't necro-bump

Closing this thread.

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky