The Rhosts authentication component (
pam_sm_authenticate()), returns success if and only if the target user's UID is not 0 and the remote host and user are listed in
/etc/hosts.equiv or in the target user's
~/.rhosts.
The following options may be passed to the authentication module:
debug
syslog(3) debugging information at
LOG_DEBUG level.
no_warn
suppress warning messages to the user. These messages include reasons why the user's authentication attempt was declined.
allow_root
do not automatically fail if the target user's UID is 0.