Specifies the name of the guest account, usually guest or nobody (a preconfigured account in the /etc/passwd file), to provide a guest account. To disable guest access, leave this field blank.
If you use a domain controller for authentication, guests are users who are not in trusted domains.
If you use a UNIX password database for authentication, guests are users who do not have an entry in the database.
Set the guest account to the name of an account in the UNIX password database (typically guest, which is mapped to the UNIX account nobody with the same access rights as the user everyone).