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and you will receive a "Can not get NONCE" error in the error_log.  You must 
specify it as:

PerlAddVar ntdomain SPEEVES

This means that you will need to resolve the DOMAIN locally on the web server
machine.  I put it into the /etc/hosts file.

For the complete run-down on this issue, check out:

http://www.gossamer-threads.com/archive/mod_perl_C1/modperl_F7/%5BFwd:_Re:_Apache::AuthenNTLM-2.04_Problems..%5D_P104237/

=head2 PerlSetVar defaultdomain 

Set the default domain. This is used when the client does not provide
any information about the domain.

=head2 PerlSetVar fallbackdomain 

fallbackdomain is used in cases where the domain that the user supplied
isn't configured. This is useful in environments where you have a lot of