[Samba] Windows 10 cannot connect without SMB1
K.R. Foley
kr at cybsft.com
Wed Mar 3 16:39:30 UTC 2021
On 2021-03-02 10:32, K.R. Foley via samba wrote:
> On 2021-03-02 10:12, Rowland penny via samba wrote:
>> On 02/03/2021 13:55, K.R. Foley via samba wrote:
>>>
>>> Initially I started testing with two VMs on the same private network,
>>> a Windows client and a Linux VM running Samba 4.11.1. These VMs
>>> were/are not physically isolated, but they are on a separate subnet
>>> with no routing to/from any other subnet. I have to work in this
>>> environment because they are not physical PCs. I got this working,
>>> but it is possible that they might have been communicating via SMB1.
>>> I then brought up an AWS instance because that is where the initial
>>> Samba server will reside (that is why there are different subnets and
>>> the VPN). Configured everything, but with 4.11.13. In the meantime
>>> the Windows VM has been updated. Now it won't support SMB1 and now my
>>> problems start.
>>>
>>> Last night, I went back to my initial test VM for the Samba server.
>>> The two VMs are on a separate subnet with no routing to/from any
>>> other network and the same problem persists. I get the exact same
>>> errors. The client still thinks that the server is trying to use
>>> SMB1.
>>>
>>> Again there is no routing between this subnet and any other subnet.
>>> However, the VMs are not physically isolated. This is not really
>>> possible in the current environment. There is an older Samba NT4 PDC
>>> on the same ESXI with the test VMs, but there is no IP routing and
>>> also the domain names are different. Is it possible that this is
>>> causing a problem?
>>>
>>
>> OK, I have downloaded the latest Win10 ISO, installed it in a VM and
>> it joined my Samba 4.13.2 AD domain. I am now of the opinion that it
>> is something in your setup that is causing this and I think it may be
>> your PDC which relies on two things. SMBv1 and netbios. Netbios does
>> not use dns, so this may be replying to the Win10 search for a DC.
>>
>> Rowland
>>
>
> Thanks. This evening I am going to try isolating the VMs completely.
> If I am unable to isolate them completely, I may just turn off the PDC
> momentarily to test. I will report back with my results.
>
Just a quick update on this. I was able to test with a freshly installed
Windows 10 VM last night that was not updated to the latest patch and it
was able to join the AD without issue.
I was not able to isolate the other VM and Samba server last night, but
should be able to this evening. So, I will isolate them on a vswitch to
see if the old PDC is in fact causing the join problem with the original
test VM or if it is something else.
kr
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