xinetd – super server ps ax | grep  xinetd extended super server, includes TCP wrapper functionality /etc/xinetd.conf ,    etc/xinetd.d   /etc/rc.d/init.d/xinetd  restart   bid – listens on only one network interface only_from – specifies IP address, network or host names, separated by spaces no_access – blacklisted computers or networks access_times – sets times during which  Full Article…