Hi, I´m having a problem deploying a FreeRadius server to authenticate Wireless users with an Active Directory. I get this message in the logs (user, challenge, domain and nt-response edited): Wed Dec 2 12:05:59 2009 : Debug: modsingle[authenticate]: calling mschap (rlm_mschap) for request 6 Wed Dec 2 12:05:59 2009 : Debug: rlm_mschap: No Cleartext-Password configured. Cannot create LM-Password. Wed Dec 2 12:05:59 2009 : Debug: rlm_mschap: No Cleartext-Password configured. Cannot create NT-Password. Wed Dec 2 12:05:59 2009 : Debug: rlm_mschap: Told to do MS-CHAPv2 for username with NT-Password Wed Dec 2 12:05:59 2009 : Debug: radius_xlat: Running registered xlat function of module mschap for string 'User-Name' Wed Dec 2 12:05:59 2009 : Debug: expand: --username=%{mschap:User-Name} -> --username=username Wed Dec 2 12:05:59 2009 : Debug: radius_xlat: Running registered xlat function of module mschap for string 'Challenge' Wed Dec 2 12:05:59 2009 : Debug: mschap2: 60 Wed Dec 2 12:05:59 2009 : Debug: expand: --challenge=%{mschap:Challenge:-00} -> --challenge=challenge Wed Dec 2 12:05:59 2009 : Debug: radius_xlat: Running registered xlat function of module mschap for string 'NT-Response' Wed Dec 2 12:05:59 2009 : Debug: expand: --nt-response=%{mschap:NT-Response:-00} -> --nt-response=nt-response Wed Dec 2 12:05:59 2009 : Debug: radius_xlat: Running registered xlat function of module mschap for string 'NT-Domain' Wed Dec 2 12:05:59 2009 : Debug: expand: --domain=%{mschap:NT-Domain} -> --domain=domain Wed Dec 2 12:05:59 2009 : Debug: Exec-Program output: Wed Dec 2 12:05:59 2009 : Debug: Exec-Program: returned: 1 Wed Dec 2 12:05:59 2009 : Debug: rlm_mschap: External script failed. Wed Dec 2 12:05:59 2009 : Debug: rlm_mschap: FAILED: MS-CHAP2-Response is incorrect Wed Dec 2 12:05:59 2009 : Debug: modsingle[authenticate]: returned from mschap (rlm_mschap) for request 6 Wed Dec 2 12:05:59 2009 : Debug: rlm_mschap: External script failed. Wed Dec 2 12:05:59 2009 : Debug: rlm_mschap: FAILED: MS-CHAP2-Response is incorrect If I execute in a shell the ntlm_auth with the same parameters as the log pointed I get an NT Key, so don´t really know why it's not working. I have tried varius solutions founded in internet without success. BTW, The entire log is attached (edited user, challenge.....). If needed I can send conf files. Thanks in advance. Unai.