How to change the proxy authentication method from NTLM to BASIC?

Solution Verified - Updated -

Issue

  • I have a proxy that offers both NTLM & BASIC authentication, how to make yum use the BASIC authentication method instead of NTLM?
  • How to force a particular authentication method within yum?
  • yum fails with 407 Proxy Authentication Required
  • yum fails with [Errno 14] curl#22 - "Invalid file descriptor"

Environment

  • Red Hat Enterprise Linux 7
  • Blue Coat Proxy 6.6.5.13

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