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You simply edit the '''/etc/hosts''' file on <u>each</u> of the '''virtual machines and host machine''':
<u>'''Obtaining MAC (Hardware) addresses on Network Computers'''</u>
When our CentOS system provides any services on a network, those services are accessible through a port number. All network services are configured to be accessed on a particular port number. By examining which ports are active on our system we can know what services (and points of attack) are available on our system. The ability to examine this information is important for troubleshooting network services and securing our systems. One great tool for this is the '''netstat''' command.
<u>'''Creating Firewall Policies'''</u>