I'm behind a M$ proxy at work which uses NTLM authentication. yum has never worked through it, currently using 2.4.1 Someone suggested using NTLMaps, http://ntlmaps.sourceforge.net/ which implements NTLM authentication (in python) and acts as a pass through proxy. I now have yum working through the M$ proxy. It would be nice if this could be made a FAQ or even better if yum could be made to handle it natively. Jason.