Chapter 10. Security

Planning and implementing security is a necessary part of every system administrator’s job. Several aspects are involved, among them physical security, password security, firewalls, encryption, virtual private networks, software updates, and log files. Physical security is much the same as it has been since the lock and key were invented, and password security entails using better methods of storing and using passwords. Everything else relates to being connected to a network, because when it comes down to it, a server that isn’t connected to a network isn’t a server. And while connecting your server to the Internet allows you to provide services reaching the world over, it simultaneously gives miscreants all over the world ...

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