Yes I have.
I think the problem is the client, not the server.
My XP notebook reports the following errors in the
system errors
------------------------------------
The Security System could not establish a secured connection with the server cifs/companyserver.mycompany.it. No authentication protocol was available.
For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
----------------------------------------------------------------------------
The Security System detected an attempted downgrade attack for server cifs/companyserver.mycompany.it. The failure code from authentication protocol Kerberos was "There are currently no logon servers available to service the logon request.
(0xc000005e)".
For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
----------------------------------------------------------------------------
The Security System could not establish a secured connection with the server DNS/companyserver.mycompany.it. No authentication protocol was available.
For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
-----------------------------------------------------------------------------------
I also tried to access the linux box in a configuration in
which I can also access my company Win2000 server:
everything runs!