Connect to a SQL Server database using Windows Authentication from a UNIX server

I'm pretty sure that this is 开发者_运维知识库not possible, but is there a way to connect to a SQL Server database using Windows Authentication from a UNIX server? The name "Windows Authentication" makes it seem that this would not be possible, but I just need to make sure.

(And don't say, "Why don't they just switch it to SQL Server Authentication?", this is obviously the solution but I need to be able to tell someone that there's no way that the Windows Authentication way will work.)

Have you looked at Kerberos Authentication in a mixed environment? (I've never implemented this but I believe it is possible by setting up 'trusts')

Enabling Interoperability with Kerberos Clients and Servers Running Other Operating Systems

Take a look at this:

http://www.easysoft.com/developer/languages/php/sql_server_unix_tutorial.html

Reading this article under "Authentication" I have the impression that the referred ODBC driver can be used with Windows Authentication