Known Bug - Synology NAS owners and Windows 10 regarding SMB Connectivity

Question

Hello Community,
I thought I would put it out there. I own two Synology NAS with the latest OS version and both of them for days now... could not be found over SMB Windows Explorer connectivity over to DSM for Synology Linux. The issue is not a technical problem with the Synology NAS. The issue is a bug in Windows 10. It turned out that I moved from the first apartment to the second. Both had a similar model of router. When I plugged in and powered on both server they showed up on network fine but SMB showed as 'No connection found' when trying to map a network drive. I worked on this for 3 days. I finally found the solution.

Solved:
Re-name the servers. Even adding a 1 to the end of the name and instantly you may now map the NASs again. I re-named the servers to good names but I tested with just a number one and it worked too.

Sincerely,
Michael
IT technician

Answer 1

I just had the same issue after updating from Windows 10 1803 to 20H2.
Removing and recreating credentials from Windows Credential Manager, as suggested on other forums, didn't help.

However, I suspected eventually SMB to be the issue and after a bit of searching in the File Services settings within DSM (Synology UI), I have found the SMB settings, which were set to SMB1 in my case.

This has worked for me:

1. Stop SMB Services
2. Maximum SMB protocol = SMB3
3. Minimum SMB protocol = SMB2
4. Start SMB Services

Hope that helps.

Answer 2

Does anyone have a permanent solution to keep the same name for the Synology server when changing to a new router without getting blocked? So far, I have found not solution with my colleagues who all use Synology. Two of them have had this issue also when they bought a new router and this was mentioned to me over text message to solve it for my new home. So it is a known bug.

Answer 3

Hi,

Thanks for posting here.

Regarding of your issue, please kindly check the following articles which I found in in Synology Support Center were helpful.

Why can't I access a Synology NAS shared folder from Windows or Mac?

Why can't I access my Synology NAS after office relocation?

Why I cannot map drives via Windows Explorer

And I also found a similar case in Synology community as below for your reference.
https://community.synology.com/enu/forum/7/post/127177

Meanwhile, if all above information was not helpful to you, I would like to suggest that you could use feedback hub in Windows 10 to submit your suggestions to Microsoft.
https://support.microsoft.com/en-us/help/4021566/windows-10-send-feedback-to-microsoft-with-feedback-hub

Hope my answer will help you. Thanks!

---Please Accept as answer if the reply is helpful---

Best Regards,
Sunny