define host{
        use                     generic-host
        host_name               google.de
        alias                   Google Website
        address                 google.de
        parents                 shack-modem
        hostgroups              http-servers
        }

define host{
        use                     generic-host
        host_name               google-dns
        parents                 shack-gw
        parents                 shack-modem
        alias                   Google DNS Service (always reachable)
        address                 8.8.8.8
        }
define service {
        host_name               google-dns
        service_description     DNS Service
        use                     generic-service
        check_command           check_dns
        }