rrshd differs from rshd in that it ignores the
remote user's alleged identity and credentials,
and unconditionally runs local tasks as a specific
unprivileged user ("nobody" or similar). It will
only allow execution of programs listed in a
configuration file (/etc/rrsh.allow), and will
exec those programs directly without using an
intermediary shell of any kind. It also has TCP
wrapper support. These modifications make it a
good deal more secure than traditional rshd.
