Hallo Axel, Dein Deutsch ist gut, aber ich antworte auf Englisch. You can download the daemon from the freeradius mailing list or the attachment of this e-mail, I configured the following: users: DEFAULT Auth-Type := smsotp sites-enabled/default: authenticate { Auth-Type smsotp { ntlm_auth smsotp } Auth-Type smsotp-reply { smsotp } } modules/ntlm_auth: exec ntlm_auth { wait = yes program = "/home/sithglan/work/smsotpd/ntlm_auth.pl %{User-Name} %{User-Password}" } I compiled freeradius using the following command line on debian: sudo apt-get install ssh sudo gcc libssl-dev make openssl ./configure --with-openssl --prefix=/local/freeradius-server-2.1.9; make; make install cd /local/freeradius-server-2.1.9/etc/raddb/certs; make Cheers, Thomas