Firewalls: https://github.com/bulletproofnetworks/ript http://holmwood.id.au/~lindsay/2012/11/12/ript-quick-reliable-painless-firewalling/ https://github.com/hw-cookbooks/ript Ript: making Linux firewall change management resilient, 2013.01 Process Supervision: https://github.com/hw-cookbooks/rc_mon Hosts File https://github.com/hw-cookbooks/hosts_file Hypervisors: https://github.com/hw-cookbooks/lxc