samba - Apr 2016 - smbclient returns error when NetBIOS disabled on Windows Server

Hello,

I have noticed that smbclient returns an error code when a windows 
server has disabled NetBIOS, but should it do this, if you know NetBIOS 
has been disabled. I think there should be a flag to indicate that you 
don't want to check port 139 (NetBIOS).

For example the following command which tries to connect to a Windows 
server with NetBIOS disabled returns an ERROR!

$ smbclient  -L //bloomsburyfs -U wstudent%password
Domain=[DCSNT] OS=[Windows Server 2008 R2 Enterprise 7601 Service Pack 
1] Server=[Windows Server 2008 R2 Enterprise 6.1]
         Sharename       Type      Comment
         ---------       ----      -------
         home            Disk      Student home drive share
         IPC$            IPC       Remote IPC
resolve_lmhosts: Attempting lmhosts lookup for name bloomsburyfs<0x20>
resolve_lmhosts: Attempting lmhosts lookup for name bloomsburyfs<0x20>
resolve_wins: Attempting wins lookup for name bloomsburyfs<0x20>
resolve_wins: WINS server resolution selected and no WINS servers listed.
resolve_hosts: Attempting host lookup for name bloomsburyfs<0x20>
Connecting to 193.61.29.86 at port 139
Error connecting to 193.61.29.86 (Error 0)
Connection to bloomsburyfs failed (Error NT_STATUS_UNSUCCESSFUL)
NetBIOS over TCP disabled -- no workgroup available

But, it would be good if you could tell "smbclient" that you don't
want
it to check for NetBIOS which means you would not get an ERROR code.

For information I am having problems with Horde Project software (Web 
Application Framework using PHP) to access files on a windows server 
(gollem), since the smb driver checks the error code from "smbclient" 
before it continues.

Thanks,

Andrew

-- 
Andrew Watkins * Birkbeck, University of London * Computer Science *
* http://notallmicrosoft.blogspot.com *
* UKOUG Systems SIG Chair * formaly Solaris SIG *
* UKOUG Systems Event 2016 committee *
* UKOUG Tech committee *

On Tue, Apr 26, 2016 at 10:18:26PM +0100, Andrew Watkins
wrote:
> Hello,
> 
> I have noticed that smbclient returns an error code when a windows
> server has disabled NetBIOS, but should it do this, if you know
> NetBIOS has been disabled. I think there should be a flag to
> indicate that you don't want to check port 139 (NetBIOS).
> 
> For example the following command which tries to connect to a
> Windows server with NetBIOS disabled returns an ERROR!
> 
> $ smbclient  -L //bloomsburyfs -U wstudent%password
> Domain=[DCSNT] OS=[Windows Server 2008 R2 Enterprise 7601 Service
> Pack 1] Server=[Windows Server 2008 R2 Enterprise 6.1]
>         Sharename       Type      Comment
>         ---------       ----      -------
>         home            Disk      Student home drive share
>         IPC$            IPC       Remote IPC
> resolve_lmhosts: Attempting lmhosts lookup for name
bloomsburyfs<0x20>
> resolve_lmhosts: Attempting lmhosts lookup for name
bloomsburyfs<0x20>
> resolve_wins: Attempting wins lookup for name bloomsburyfs<0x20>
> resolve_wins: WINS server resolution selected and no WINS servers listed.
> resolve_hosts: Attempting host lookup for name bloomsburyfs<0x20>
> Connecting to 193.61.29.86 at port 139
> Error connecting to 193.61.29.86 (Error 0)
> Connection to bloomsburyfs failed (Error NT_STATUS_UNSUCCESSFUL)
> NetBIOS over TCP disabled -- no workgroup available
> 
> But, it would be good if you could tell "smbclient" that you
don't
> want it to check for NetBIOS which means you would not get an ERROR
> code.
The code in 4.4.x is quite sophisticated, in that is by
default tries port 445 and then 5msecs later tries 139.

So it should be trying 445 by default. What is your
smb.conf set to, and can you post a debug level 10 log
from this smbclient command ?

On 4/29/2016 10:14 PM, Jeremy Allison wrote:
> On Tue, Apr 26, 2016 at 10:18:26PM +0100, Andrew Watkins wrote:
>> Hello,
>>
>> I have noticed that smbclient returns an error code when a windows
>> server has disabled NetBIOS, but should it do this, if you know
>> NetBIOS has been disabled. I think there should be a flag to
>> indicate that you don't want to check port 139 (NetBIOS).
>>
>> For example the following command which tries to connect to a
>> Windows server with NetBIOS disabled returns an ERROR!
>>
>> $ smbclient  -L //bloomsburyfs -U wstudent%password
>> Domain=[DCSNT] OS=[Windows Server 2008 R2 Enterprise 7601 Service
>> Pack 1] Server=[Windows Server 2008 R2 Enterprise 6.1]
>>          Sharename       Type      Comment
>>          ---------       ----      -------
>>          home            Disk      Student home drive share
>>          IPC$            IPC       Remote IPC
>> resolve_lmhosts: Attempting lmhosts lookup for name
bloomsburyfs<0x20>
>> resolve_lmhosts: Attempting lmhosts lookup for name
bloomsburyfs<0x20>
>> resolve_wins: Attempting wins lookup for name bloomsburyfs<0x20>
>> resolve_wins: WINS server resolution selected and no WINS servers
listed.
>> resolve_hosts: Attempting host lookup for name bloomsburyfs<0x20>
>> Connecting to 193.61.29.86 at port 139
>> Error connecting to 193.61.29.86 (Error 0)
>> Connection to bloomsburyfs failed (Error NT_STATUS_UNSUCCESSFUL)
>> NetBIOS over TCP disabled -- no workgroup available
>>
>> But, it would be good if you could tell "smbclient" that you
don't
>> want it to check for NetBIOS which means you would not get an ERROR
>> code.
> The code in 4.4.x is quite sophisticated, in that is by
> default tries port 445 and then 5msecs later tries 139.
>
> So it should be trying 445 by default. What is your
> smb.conf set to, and can you post a debug level 10 log
> from this smbclient command ?
I solved the problem a couple of hours ago.

Well I am using Samba 3.6.x version and after I installed Samba 4.4.x it 
worked fine.
Guess I need to upgrade our systems, but using samba that comes with 
Solaris 11.

Thanks for now.

Andrew

-- 
Andrew Watkins * Birkbeck, University of London * Computer Science *
* http://notallmicrosoft.blogspot.com *
* UKOUG Systems SIG Chair * formaly Solaris SIG *
* UKOUG Systems Event 2016 committee *
* UKOUG Tech committee *