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Network Administration with FreeBSD 7 by Babak Farrokhi

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Chapter 7. Network Configuration—Basics

FreeBSD gives you an in-depth control over your network configuration. This is done using a few simple but powerful tools such as ifconfig(8).

This chapter explains interface configuration using ifconfig(8) utility and a number of related configuration files, as well as some connectivity test and debugging tools.

In this chapter, we will look at the following:

  • Ifconfig utility

  • Advanced ifconfig options

  • Network testing tools.

Ifconfig Utility

The ifconfig(8) utility is your all-in-one utility to configure a network interface's layer2 and layer3 characteristics.

From an operating system's point of view, your system has a number of physical and logical network interfaces attached.

Physical network interfaces include ...

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