Chapter 8. Network Services


“They have an Internet for computers now?”

 --Homer Simpson

Network security historically has been a topic reserved for devices at the edge of a network or for road warrior machines. Firewalls, Virtual Private Networks, and link-level encryption are generally difficult to configure and require third-party products. Mac OS X, however, brings simple and robust network security mechanisms to every server and workstation. Although the implementations are not without faults, they provide a mechanism every user can utilize to secure their host from network-based attacks.


Firewalls are typically network devices that control the flow of traffic. Companies will place firewalls in front of networks they want to protect ...

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