Accessing windows shares using smbclient command failing with "cli_negprot: SMB signing is mandatory and we have disabled it.".

Solution Verified - Updated -


  • Attempts to access windows shares using the smbclient command is failing with :
#  smbclient -S off -L'//A-Windows-Share' -U A-Authorized-User
Enter A-Authorized-Users password:
cli_negprot: SMB signing is mandatory and we have disabled it.
protocol negotiation failed: NT_STATUS_ACCESS_DENIED
  • How can windows shares be accessed via smbclient with digitally signed communications.


  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Active Directory

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In