Question Trouble accessing Synology DS218J NAS from Windows 10 (SMB traffic ends at Negotiate Protocol Response, doesn't proceed to Session Setup Request)

[Goi]

Hi,

I have a Synology DS218J on SMB. I have been able to access it via Windows Explorer with \\hostname just fine, but I just tried today and it no longer works. I get the following error message when I try to access a folder within the NAS

I get the following error message when I try to access the NAS hostname/IP address directly

When I try to map a new network drive, it doesn't detect anything on my network.

The Synology web portal works fine. I'm able to access it on my web browser. I'm also able to ping it just fine. I'm also able to access it on my Android device using the DS file app. However, I can't access it via Windows Explorer either via \\hostname or \\ipaddress.

I tried net use * /delete and then manually add the NAS root or the shared folders. Here are the results:
"net use X: \\hostname or IP address" - The network path was not found.

"net use X: \\hostname or IP address\SharedFolder" - System error 1790 has occurred. The network logon failed.

If I try the above net use command again, I'll get "System error 59 has occurred. An unexpected network error occurred."

I also tried the following:
"pushd \\hostname or IP address\SharedFolder" - I get either "The operation being requested was not performed because the user has not been authenticated." or "A device attached to the system is not functioning."

I've tried rebooting both my PC and the NAS, disabling(then re-enabling) SMBv1, disabling IPv6, turning on network discovery and file and printer sharing (though this should only affect my sharing of my PC right?)

What's wrong?

 

[JackMDS]

Check the Firewall.

Reboot the Router too.

Make sure that it runs IPV4 with static IP.



P.S. When it comes to Networking trouble shooting Win 10 is basically useless, most of its diagnosis converting to words what we already know not really offers solutions.

Try these two Portable free Apps, they might provide some additional info.

Show network adapters information and disable / enable them

NetworkInterfacesView is a simple tool that displays the list of all network adapters/interfaces installed on your system and allows you to disable / enable them.

www.nirsoft.net

NetworkTrafficView - Monitor the traffic on your network adapter

Network monitoring tool that captures the packets pass through your network adapter, and displays general statistics about your network traffic

www.nirsoft.net

.

 

[mxnerd]

Maybe you need some registry editing if enabling SMBv1 doesn't work?

How to fix ‘Windows cannot access computer’ Error Code 0x80004005

Windows OS is positioned as an enterprise-friendly operating system with various features to support workgroups and the sharing of files and physical

www.techjunkie.com

 

[boomerang]

I don't have the background to know why the settings I am documenting below worked for me but they have led to near total consistency in being able to connect to my Synology. I stumbled across a tutorial that documented these changes somewhere but have no recollection where.

 

[SamirD]

Glad you got it working and thank you for documenting it for others.

 

[Goi]

After going through the Synology troubleshooting guide at https://community.synology.com/enu/forum/1/post/123419 I am now able to see the NAS in my Network in Windows Explorer. However, still unable to access it, or any of its shared folders, in Windows Explorer.

I did notice that in my NAS File Services->SMB, that the workgroup is set as WORKGROUP.

I vaguely remember that Windows 10 stopped supporting workgroups. Could this be why? If not, how do I check what workgroup my Windows 10 PC is in?

 

[boomerang]

I vaguely remember that Windows 10 stopped supporting workgroups. Could this be why? If not, how do I check what workgroup my Windows 10 PC is in?

You can check by going to Control Panel > System. Unless you changed it, WORKGROUP is the default.

The easiest and IMO, the best way to access the files in your Synology is through your browser.

In your Synology, go to Control Panel > Application Portal. There on the Application tab you will find various apps installed on your Synology. Click File Station and then the Edit button. Check Enable customized alias and then accept the default which is 'files' or change it to something that works for you. Notice that there is a link. It is clickable right inside that dialog box. Once opened in your browser it can be bookmarked. It will open your entire folder structure and you can interact with them as you please.

 

[VirtualLarry]

I vaguely remember that Windows 10 stopped supporting workgroups.

No, that was "HomeGroups".

 

[Goi]

You can check by going to Control Panel > System. Unless you changed it, WORKGROUP is the default.

The easiest and IMO, the best way to access the files in your Synology is through your browser.

In your Synology, go to Control Panel > Application Portal. There on the Application tab you will find various apps installed on your Synology. Click File Station and then the Edit button. Check Enable customized alias and then accept the default which is 'files' or change it to something that works for you. Notice that there is a link. It is clickable right inside that dialog box. Once opened in your browser it can be bookmarked. It will open your entire folder structure and you can interact with them as you please.

View attachment 19271

Yes, I can still access it via DSM, and this has been a workaround, but I wish to be able to access it from Windows Explorer as a mounted drive.

Anyway, I also tried using Synology Assistant to detect my drive, and it is able to. However, when I try to map a drive to a shared folder with valid credentials, I get the following error:

Occasionally, I get error 31.

If I enter bogus credentials, I get the same error. However, if I enter an invalid username, I get the error "The user account was not found on <hostname>", so I know the SMB requests are reaching the NAS, but somehow I'm not getting authenticated. Could that specific Windows 10 PC be somehow blacklisted from the NAS? Using the same credentials on my other laptop grants me access to the NAS.

 

[mxnerd]

https://community.synology.com/enu/forum/5/post/121930?page=2&sort=oldest

OMG - if only I had checked earlier. SOLVED - Control Panel -> Info -> Services -> allow through firewall for SMB. *sigh* So frustrating it took as long as it did. Was this a recent change?

 

[boomerang]

If I enter bogus credentials, I get the same error. However, if I enter an invalid username, I get the error "The user account was not found on <hostname>", so I know the SMB requests are reaching the NAS, but somehow I'm not getting authenticated. Could that specific Windows 10 PC be somehow blacklisted from the NAS? Using the same credentials on my other laptop grants me access to the NAS.

Based on what you're saying above, the problem lies with the one laptop not the Synology. But try the following just for grins.

In the Synology go to Control Panel > Security and then the Firewall tab. Turn off the Firewall as a test. I don't think doing this will make a difference but a firewall rule can be created to block access based on an IP address. I don't know what the error message is that you'd get in that case though.

You say you can't map a drive. I'm curious what happens if you double click the Synology under Network in File Explorer? Something like below. I have one encrypted folder on my Synology that does not appear but besides that every folder I have shows up below. I am an administrator so I see and have access to everything.

 

[Goi]

Based on what you're saying above, the problem lies with the one laptop not the Synology. But try the following just for grins.

In the Synology go to Control Panel > Security and then the Firewall tab. Turn off the Firewall as a test. I don't think doing this will make a difference but a firewall rule can be created to block access based on an IP address. I don't know what the error message is that you'd get in that case though.

Firewall isn't even enabled in DSM.

You say you can't map a drive. I'm curious what happens if you double click the Synology under Network in File Explorer? Something like below. I have one encrypted folder on my Synology that does not appear but besides that every folder I have shows up below. I am an administrator so I see and have access to everything.

View attachment 19381

This is what I see in the Network in Windows Explorer

The red blocks are my NAS device (both point to the same hostname). If I double click on DS218j in "Other Devices) I get directed to DSM web portal. If I click on the top red box, I get the following error:

 

[pauldun170]

Jumping in pretty late since I don;t stop by this sub too much and I just saw the thread title.

Good old SMB 1.0 crap...
You need to enable SMB 2.x \3.x on the NAS AND then disable SMB 1 on your windows

How to detect, enable and disable SMBv1, SMBv2, and SMBv3 in Windows

Describes how to enable and disable the Server Message Block protocol (SMBv1, SMBv2, and SMBv3) in Windows client and server environments.

docs.microsoft.com

 

[Goi]

Jumping in pretty late since I don;t stop by this sub too much and I just saw the thread title.

Good old SMB 1.0 crap...
You need to enable SMB 2.x \3.x on the NAS AND then disable SMB 1 on your windows

How to detect, enable and disable SMBv1, SMBv2, and SMBv3 in Windows

Describes how to enable and disable the Server Message Block protocol (SMBv1, SMBv2, and SMBv3) in Windows client and server environments.

docs.microsoft.com

Thanks for jumping in, but this isn't an SMB 1.0 problem. It's already disabled in Windows, and SMB 2.0 is already enabled in my NAS.

 

[Goi]

OK, so I've compared captured Wireshark traffic (.128 is my NAS) between a working laptop, and my non-working PC, when I try to access my NAS in Windows Explorer at "\\hostname". Below are screenshots of the capture:

Non-working PC




Working laptop


As you can see, traffic on the non-working PC stops after SMB2 Negotiate Protocol Response (returning a RST, ACK after Negotiate Protocol Response and then trying the whole exchange 2 more times before quitting), while the working laptop continues with Session Setup Request/Response.

What could be causing this?

 

[mxnerd]

See if Network Reset helps.

Also make sure Network Profile is Private, not Public.

 

[Goi]

Just tried Network Reset, didn't change anything.

I also tried to establish shared folders on both the non working PC and the working laptop. The working laptop can access the shared folder on the non working PC, but not the other way round.

So, something is really wrong with my PC. Is there a way of resetting SMB settings?

I don't think public vs private network makes any different. The working laptop is set to public anyway.

 

[Goi]

Just tried Network Reset, didn't change anything.

I also tried to establish shared folders on both the non working PC and the working laptop. The working laptop can access the shared folder on the non working PC, but not the other way round.

So, something is really wrong with my PC. Is there a way of resetting SMB settings?

I don't think public vs private network makes any different. The working laptop is set to public anyway.

I also tried connecting to the NAS with smbclient -L <hostname> in a Linux VM on both working and non working systems. The working laptop works, but once again, the non working PC doesn't work, returning a NT_STATUS_INVALID_NETWORK_RESPONSE

 

[mxnerd]

The laptop is using Public profile, of course you can't access it's shared folder from your PC or any other PC. Public network profile means Windows will block file sharing even if it's enabled.

Do't really know what happen to your PC. Check PC's event viewer?

 

[Goi]

OK, just found something weird.

I tried to force SMB2 on the Linux VM running on my non-working PC with "smbclient -m SMB2 -L <hostname>" AND IT WORKED!!!

If I then try to force SMB1 with "smbclient -m SMB1 -U galapogos -L 192.168.1.128" then I get the NT_STATUS_INVALID_NETWORK_RESPONSE error again. This is despite the Wireshark traces showing SMB2 packets (not SMB). What. The. Actual. Hell?! How do I force SMB2 on Windows 10? I thought I already did that in Windows Features (screenshot below)

 

[mxnerd]

Is it possible DS218J blocked the PC or its IP?

 

[Goi]

Is it possible DS218J blocked the PC or its IP?

I thought that might be the case because my PC is the only one that can't access, but I don't think so, because:
1. I can access the NAS via the web portal from the PC
2. I cannot access the NAS from a Linux VM in my PC with default settings. The Linux VM has a different IP address from the host PC.
3. I can access the NAS from the Linux VM when I force SMB2.

This seems to point to an SMB version problem? The trouble is, I can't find anywhere else in Windows to disable SMB1 (already did this in Windows Features and Registry)

 

[mxnerd]

Accessing files on network devices using SMBv1 on Windows 10

In this guide, we show you the steps to regain access to your network files when connecting to a device that is still using the SMB version 1 protocol.

www.windowscentral.com

How to find out if SMBv2 is enabled on your PC
SMB version 2 should be enabled by default on your Windows 10 installation, but you can check using these steps:

1. Open Start.
2. Search for PowerShell, right-click the top result, and select Run as administrator.
3. Type the following command to check if SMBv2 is enabled and press Enter:
   Get-SmbServerConfiguration | Select EnableSMB2Protocol
   If the output returns True, then SMBv2 is enabled. If the output is False, use this command to enable it and press Enter:
   Set-SmbServerConfiguration –EnableSMB2Protocol $true

 

[mxnerd]

If nothing works, try Synology tech support or it's own forum.

Synology Community

Hi! Come and join us at Synology Community. A place to answer all your Synology questions. Ask a question or start a discussion now.

community.synology.com

 

[Goi]

Tried the Powershell command, and SMB2 is enabled. I've already posted in Synology forum, but I don't think it's a problem with my NAS but something wrong with my Windows installation. I can't access ANY SMB shares at all, including other laptop SMB shares.