I am running RADIUS ( has embedded ntlm_auth to authenticate to Windows AD) at debug level. The message below gets occasionally displayed on the screen. The serer continues to authenticate users anyway, but wonder if anyone has any idea of what is going on here. Usage: [OPTION...] --helper-protocol=helper protocol to use operate as a stdio-based helper --username=STRING username --domain=STRING domain name --workstation=STRING workstation --challenge=STRING challenge (HEX encoded) --lm-response=STRING LM Response to the challenge (HEX encoded) --nt-response=STRING NT or NTLMv2 Response to the challenge (HEX encoded) --password=STRING User's plaintext password --request-lm-key Retrieve LM session key --request-nt-key Retrieve User (NT) session key --use-cached-creds Use cached credentials if no password is given --diagnostics Perform diagnostics on the authentictaion chain --require-membership-of=STRING Require that a user be a member of this group (either name or SID) for authentication to succeed --pam-winbind-conf=STRING Require that request must set WBFLAG_PAM_CONTACT_TRUSTDOM when krb5 auth is required Help options: -?, --help Show this help message --usage Display brief usage message Common samba config: --configfile=CONFIGFILE Use alternate configuration file Common samba options: -V, --version Print version