following setup:
3 computer with SUSE SLED 15.2
2 Laptop with Windows 10
NAS Sever Sznology with DSM. DSM is Linux, but an special and in fact very comfortable version of Linux
The server runs NFS, but not NIS. We use AD network that is supported by Windows and Linux as well.
DHCP server comes from a Cisco Firewall
Problem:
Windows can see the see the server.
Linux, wen you klick on windows network - Unable to access location, Failed to retrieve share listr from Server: No such file or directory.
SAMBA has been setup
UserLogon setup
But Computer name is not resolvable.
I can add network drives - but only via IP adress (same for printer), but both via SMB or NFS.
SUSE Service had checked it, tried a lot, we made a complete fresh and virgin installation - couldn’t find a solution. It has been reported as bug - but SUSE can’t find a bug, closed the case
Question: What goes wrong here.
@HANS-CHRISTOPH Hi, likely the SMB version on the NAS, which is?
If you try logging in from the command line on the linux guest and run smbclient -d 3 -L //<host_ip>/ does it show errors?
Hi Malcom,
sorry for late reply - was somehow busy. You are really good - always answering. However, i talked with SUSE developer - are German as well 
- and told them only those responses for failure make the system better. Microsoft do that by pulling Metadata - we need to do in different ways. But, SUSE got better - much better - compared to version 11.
The NAS runs both SMB 2 and 3 and large MTU. The detailed version I couldn’t find.
SLED15Desktop:/home/hans-christoph # smbclient -d 3 -L //10.0.25.3/
Enter HCPIN\hans-christoph’s password:
GENSEC backend ‘gssapi_spnego’ registered
GENSEC backend ‘gssapi_krb5’ registered
GENSEC backend ‘gssapi_krb5_sasl’ registered
GENSEC backend ‘spnego’ registered
GENSEC backend ‘schannel’ registered
GENSEC backend ‘naclrpc_as_system’ registered
GENSEC backend ‘sasl-EXTERNAL’ registered
GENSEC backend ‘ntlmssp’ registered
GENSEC backend ‘ntlmssp_resume_ccache’ registered
GENSEC backend ‘http_basic’ registered
GENSEC backend ‘http_ntlm’ registered
GENSEC backend ‘http_negotiate’ registered
Cannot do GSE to an IP address
Got challenge flags:
Got NTLMSSP neg_flags=0x62898215
NTLMSSP: Set final flags:
Got NTLMSSP neg_flags=0x62088215
NTLMSSP Sign/Seal - Initialising with flags:
Got NTLMSSP neg_flags=0x62088215
NTLMSSP Sign/Seal - Initialising with flags:
Got NTLMSSP neg_flags=0x62088215
Sharename Type Comment
--------- ---- -------
netlogon Disk
sysvol Disk
ActiveBackupforBusiness Disk
drive_h Disk
drive_i Disk
drive_p Disk
drive_x Disk
homes Disk user home
music Disk System default shared folder
photo Disk System default shared folder
usbshare1 Disk Western Digital Technologies, Inc.
Users Disk
video Disk System default shared folder
IPC$ IPC IPC Service ()
dell_3100cn Printer Dell Laser Printer 3100cn
hp_laserjet_700 Printer Hewlett-Packard HP LaserJet 700 color MFP M775
SMB1 disabled -- no workgroup available
We do not use SMB1 since 2 and 3 are more safe.
@HANS-CHRISTOPH Hi, so looks like just a netbios naming issue, I’m not a samba user, just use sftp/scp etc 
Have a read here: https://documentation.suse.com/sles/15-SP2/html/SLES-all/cha-samba.html and suggest a google of samba+Troubleshooting NetBIOS names
ok, thanks. I’ll check up. But is netbios not an very old protocol?
I get this result:
SLED15Desktop:/etc/samba # net ads join -U Administrator -S HCPIN
Enter Administrator’s password:
Failed to join domain: failed to lookup DC info for domain ‘HCPI.HQ’ over rpc: {Operation Failed} The requested operation was unsuccessful.
I placed many screenshots here - not sure they are visible?
@HANS-CHRISTOPH Hi is the firewall running, if so stop temporarily and test.
The PC I tested is in internal zone. All ports should be open?