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<google>BUY_UBUNTU_10</google>
[http://www.linuxtopia.org/Linux_Firewall_iptables/index.html http://www.linuxtopia.org/Linux_Firewall_iptables/index.html]
The goal of this chapter is to cover some of the basic concepts of firewalls, TCP/IP ports and services. The configuration of a firewall on an Ubuntu system will be covered in [[Using Firestarter to Configure an Ubuntu 10.x Firewall]].
24.1 Understanding Ports and Services
