SMB Signing not required Vulnerability

Issue

How to resolve SMB Signing not required vulnerability reported by third party security scanner?

• Samba file sharing server is installed and enabled.

• Third party security scanner reports SMB Signing not required vulnerability.

• nmap reports Message signing disabled or Message signing enabled but not required:

  # nmap --script smb-security-mode.nse -p445 127.0.0.1
  
  PORT    STATE SERVICE
  445/tcp open  microsoft-ds
  
  Host script results:
  | smb-security-mode: 
  |   Account that was used for smb scripts: guest
  |   User-level authentication
  |   SMB Security: Challenge/response passwords supported
  |_  Message signing disabled (dangerous, but default)
  

  # nmap --script smb2-security-mode.nse -p445 127.0.0.1
  
  PORT    STATE SERVICE
  445/tcp open  microsoft-ds
  
  Host script results:
  | smb2-security-mode: 
  |   3.11: 
  |_    Message signing enabled but not required