SMB: mounting shares through WAN connection fail

Solution Verified - Updated -

Issue

  • SMB client can not mount a SMB share using a WAN connection.
  • SMB clients within the same network as the SMB server can mount the SMB share.
  • Logged errors include
CIFS VFS: Send error in SessSetup = -11
CIFS VFS: cifs_mount failed w/return code = -11

Environment

  • Red Hat Enterprise Linux SMB client
  • SMB/SMB2
  • Riverbed WAN optimizer between SMB client and SMB server

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