LFCS Question #650: Real Exam Question with Answer & Explanation

Question

Which of the following are roles of the winbindd service? (Choose TWO correct answers)

Options

• AMaintain mappings between Unix UID/GID and Windows SID.
• BRetrieve the user's password from the Windows server.
• CAdd machine accounts to the idmap table.
• DUser authentication by querying a Windows server.
• EProxy the request of the WINS search to the appropriate Windows server.

Explanation

The winbindd service primarily maintains mappings between Unix UIDs/GIDs and Windows SIDs, and performs user authentication by querying a Windows Domain Controller.

Common mistakes.

• B. While winbind handles authentication, it typically does not directly 'retrieve' the user's password in plain text from the Windows server; it performs a secure authentication challenge-response process.
• C. Winbind manages ID mappings for users and groups, but the direct addition of machine accounts to an idmap table is usually part of the domain join process or net command, not a primary continuous role of winbindd.
• E. WINS (Windows Internet Name Service) resolution is handled by the nmbd daemon in Samba, not winbindd.

Concept tested. Winbind service roles

Reference. https://www.samba.org/samba/docs/man/manpages/winbindd.8.html

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