The guest service module for PAM allows guest logins. If successful, the
pam_guest module sets the PAM environment variable
GUEST to the login name. The application can check this variable using
pam_getenv(3) to differentiate guest logins from normal logins.
The following options may be passed to the
pam_guest module:
guests=list
Comma-separated list of guest account names. The default is “
guest”. A typical value for
ftpd(8) would be “
anonymous,ftp”.
nopass
Omits the password prompt if the target account is on the list of guest accounts.
pass_as_ruser
The password typed in by the user is exported as the
PAM_RUSER item. This is useful for applications like
ftpd(8) where guest users are encouraged to use their email address as password.
pass_is_user
Requires the guest user to type in the guest account name as password.