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+<think>
+Okay, I'm trying to figure out why my Windows 98 VM in QEMU can't connect to the SMB server. The error message says "smb2_multi_protocol_reply_negprot: No protocol supported!", which sounds confusing. Let me walk through what I know and try to solve this step by step.
+
+First, from the logs provided, it looks like the SMB server is receiving requests for several protocols: DOS LANMAN2.1, Windows for Workgroups 3.1a, and NT LM 0.12. But then there's an error indicating no supported protocol was found. So maybe the server isn't configured to handle these older protocols?
+
+I remember that when setting up SMB shares, especially in QEMU, the default settings might not always be compatible with older operating systems like Windows 98. I've heard that sometimes you need to adjust the configuration to ensure compatibility.
+
+Looking at the steps provided, the user mentioned that adding `server min protocol = LANMAN1` to the smb.conf file fixed the issue. That makes sense because LANMAN1 is a very basic protocol that older systems like Windows 98 would use. If the server doesn't support it by default, newer clients (even if they're emulated) might not connect.
+
+I should check what the default `server min protocol` setting is in Samba. From what I recall, Samba's default settings are aimed at more modern protocols to ensure security and compatibility with current systems. But for older OS support, you might need to lower this setting. 
+
+So, perhaps the QEMU SMB server isn't configured to handle such old protocols by default. To fix this, explicitly setting `server min protocol = LANMAN1` in the global section of smb.conf would tell Samba to accept connections using that protocol and older ones.
+
+I should also consider if there are any security implications of lowering the minimum protocol version. However, since this is a controlled environment (a VM), it's probably safe for testing and development purposes.
+
+Another thing to note is that the user had to manually edit the smb.conf file each time they set up the VM. It would be better if QEMU automatically included this setting when an older OS is detected, but until then, manual configuration might be necessary.
+
+So, putting it all together: The issue arises because the default SMB server settings don't support the protocols that Windows 98 uses. By explicitly allowing LANMAN1 in smb.conf, the connection becomes possible.
+</think>
+
+The problem occurs because the QEMU SMB server isn't configured to handle older protocols like LANMAN1 by default. To resolve this:
+
+1. **Modify the smb.conf File**: Add `server min protocol = LANMAN1` under the `[global]` section.
+2. **Restart the SMB Service**: After updating the configuration, restart the Samba service for changes to take effect.
+
+**Step-by-Step Explanation:**
+
+1. **Access smb.conf**: Locate the temporary SMB configuration file created by QEMU (e.g., `/tmp/qemu-smb.TU2YU2/smb.conf`).
+
+2. **Edit Configuration**: Open the `smb.conf` file in a text editor.
+
+3. **Add Protocol Setting**: Insert the line `server min protocol = LANMAN1` under the `[global]` section to ensure compatibility with older systems like Windows 98.
+
+4. **Save Changes**: Save the modified `smb.conf` file.
+
+5. **Restart Samba Service**: To apply the changes, restart the relevant Samba services or the VM instance if running within QEMU.
+
+This adjustment allows the SMB server to support the necessary protocols for connecting older operating systems like Windows 98 through QEMU's user-mode networking setup.
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