DiskStation Manager 4.0 Windows XP compatability

All questions regarding using our system with Windows XP, Vista, 7 may go here.
Forum rules
1) This is a user forum for Synology users to share experience/help out each other: if you need direct assistance from the Synology technical support team, please use the following form:

https://account.synology.com/support/su ... p?lang=enu

2) To avoid putting users' DiskStation at risk, please don't paste links to any patches provided by our Support team as we will systematically remove them. Our Support team will provide the correct patch for your DiskStation model.
I'm New!
I'm New!
Posts: 3
Joined: Tue Mar 20, 2012 1:57 am

DiskStation Manager 4.0 Windows XP compatability

Unread post by bigmudcake » Tue Mar 20, 2012 2:12 am

Hi there,

I recently upgraded our Synology NAS Firmware to DSM 4.0 and found that our Windows XP workstations would no longer connect. After investigation it appears that the Samba server
settings in the new firmware has been changed to no longer permit authentication via NTLM,
only NTLMv2 and newer methods.

To fix this in your Windows XP Pro workstation perform the following steps.

1. Click on the Start Button and key in secpol.msc in the search box and hit Enter.
2. When the Local Security Policy editor has loaded, expand Local Policies and select Security Options.
3. Scroll through the list and locate "Network Security: LAN Manager authentication level." Right click on this setting and select Properties.
4. Change the setting to "Send LM & NTLM - use NTLMv2 session security if negotiated"
5. Hit OK and then reboot the Windows XP computer

Your NAS will be accessible again in Windows XP.

P.S. Can you guys at Synology add an option in the firmware (Control Panel -> Win/Mac/NFS -> Windows File Service) to allow the turning on of NTLM compatibility at the server end.

Post Reply

Return to “Windows OS”