In order to make Samba provide SMB services only on TCP port 445 instead of TCP port 139 through NetBIOS, which parameter is required in smb.conf?

Question

Options

• Asmb ports = 445
• Bnetbios name service = No
• Cdisable directhosting = No
• Dsocket options = port:445
• Edirect tcp = yes

• A
  89% (51)
• C
  4% (2)
• D
  5% (3)
• E
  2% (1)

Explanation

smb ports = 445 is the correct smb.conf parameter because Samba explicitly reads this directive to bind SMB traffic to specific TCP ports - setting it to 445 tells Samba to use direct TCP hosting only, bypassing the legacy NetBIOS-over-TCP (port 139) transport entirely.

The distractors fail for these reasons: B (netbios name service = No) controls NetBIOS name resolution (nmbd), not which port smbd listens on. C (disable directhosting = No) is a Windows registry concept, not a valid smb.conf parameter. D (socket options) tunes low-level socket behavior (e.g., TCP_NODELAY) and cannot redirect the listening port. E (direct tcp = yes) is not a real Samba parameter.

Memory tip: Think "smb ports" as Samba's literal port list - whatever you put there is exactly what it binds to. If you want only 445, you say smb ports = 445; if you want both legacy and modern, you'd list smb ports = 139 445.

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