[Samba] Ancient SMB client issues

[Anders Östling]

Actually, I made it work by adding the “min server protocol = NT1” on the virtual dedicated server. So I guess that this will solve our dilemma (unless I missed something). 
In any case, one of the robots now have access to the new server. Will try the second one as soon as I get a chance (they are busy bending steel ;:) )

Anders

> On 11 Apr 2024, at 14:55, Rowland Penny via samba <samba at lists.samba.org> wrote:
> 
> On Thu, 11 Apr 2024 14:38:51 +0200
> Anders Östling via samba <samba at lists.samba.org> wrote:
> 
>> I have a customer with a couple of industrial robots running Linux
>> 2.6.34 and Samba 3.4.7 (smbclient -V). They are able to connect to
>> SMB shares on Windows servers IF I "allow unsafe connections”, ie
>> lower the SMB minimum level. The servers are on Windows 2019, and
>> this setup has worked for a couple of years now.
>> 
>> I have created a virtual Debian/Samba 4.19 server with the intention
>> of moving over the SMB shares that the robots need to this server. If
>> I connect from Windows 10 clients to the Samba servers shares, no
>> issues. If I try the same from the robot (ancient SMB) then it fails
>> with the rather bleak “protocol negotiation failed:
>> NT_STATUS_INVALID_NETWORK”. I get this error regardless of the min
>> protocol level (NT1 or SMB2) on the server. 
>> 
>> In short, are we doomed to stay with the unsafe Windows share
>> connections, or is there another way to migrate from Windows to
>> Linux? Maybe running an ancient Samba too, but that does not sound
>> too attractive…
> 
> You probably need three machines:
> 
> Your industrial robots that use SMBv1
> 
> A 'machine' in the middle with 'server min protocol = NT1' set (it will
> default to 'client min protocol = SMB2_02'
> 
> A Samba server that isn't using SMBv1
> 
> The robot can connect to and download files from the intermediate
> machine, which in turn (without using SMBv1) can download from the
> Samba server.
> 
> Rowland
> 
> 
> 
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