Astec-Xなどでrexecプロトコル接続ができない

# vi /etc/xinetd.d/rexec
# default: off
# description: Rexecd is the server for the rexec(3) routine.  The server \
#       provides remote execution facilities with authentication based \
#       on user names and passwords.
service exec
{
        disable              = no
        socket_type             = stream
        wait                    = no
        user                    = root
        log_on_success          += USERID
        log_on_failure          += USERID
        server                  = /usr/sbin/in.rexecd
}