Hey All, I am trying to configure FreeRadius (on Debian) to authenticate against Samba. Running NTLM_Auth from the command line results in a valid login. However FreeRADIUS call to ntlm_auth results in a Logon failure. From the command line I run: /usr/bin/ntlm_auth --request-nt-key --domain=MyDom --username=radtest (MyDom is not the actual Domain but still works when I use it in place of the actual domain???) And then I enter the correct password and the result is “NT_STATUS_OK: Success (0x0)”. The debug output from freeradius is: Exec-Program: /usr/bin/ntlm_auth --request-nt-key --domain=MyDom --username=radtest --challenge=3bdc9461e268b957 --ntresponse=d618ee49ab97f0ea5cc9c491904dbbbea5a56eb5c9cc0608 Exec-Program output: Logon failure (0xc000006d) I would assume that there is some sort of problem with the creation of the challenge/response but that is difficult to test. I have tried two different usernames/passwords and both combinations result in the same error. Any suggestions? Thanks