Hi I'm trying to authenticate our squid-proxy against a w2k3-dc with winbind and with the helper-protocol: squid-2.5-ntlmssp. /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp --require-membership-of=S-1-5-21-1957994488-688789844-1417001333-13571 I got the following error: username password [2010/06/09 08:28:56, 1] utils/ntlm_auth.c:801(manage_squid_ntlmssp_request) BH NTLMSSP query invalid The same with the squid-2.5-basic-helper works fine. Any hints? Thanks a lot. Tom