Book Image

Linux Networking Cookbook

By : Agnello Dsouza, Gregory Boyce
5 (1)
Book Image

Linux Networking Cookbook

5 (1)
By: Agnello Dsouza, Gregory Boyce

Overview of this book

Linux can be configured as a networked workstation, a DNS server, a mail server, a firewall, a gateway router, and many other things. These are all part of administration tasks, hence network administration is one of the main tasks of Linux system administration. By knowing how to configure system network interfaces in a reliable and optimal manner, Linux administrators can deploy and configure several network services including file, web, mail, and servers while working in large enterprise environments. Starting with a simple Linux router that passes traffic between two private networks, you will see how to enable NAT on the router in order to allow Internet access from the network, and will also enable DHCP on the network to ease configuration of client systems. You will then move on to configuring your own DNS server on your local network using bind9 and tying it into your DHCP server to allow automatic configuration of local hostnames. You will then future enable your network by setting up IPv6 via tunnel providers. Moving on, we’ll configure Samba to centralize authentication for your network services; we will also configure Linux client to leverage it for authentication, and set up a RADIUS server that uses the directory server for authentication. Toward the end, you will have a network with a number of services running on it, and will implement monitoring in order to detect problems as they occur.
Table of Contents (19 chapters)
Linux Networking Cookbook
About the Author
About the Reviewer

Installing Nagios

Nagios is an industry standard for open source monitoring and reporting. It is incredibly flexible and extendable, for better or worse. Getting it set up and running is not too difficult, but additional thought and understanding both Nagios and the systems which you would like to monitor will be necessary in order to create a configuration which is easy to understand and maintain.

How to do it…

  1. Install nagios:

    sudo apt-get install nagios3
  2. Select a password when prompted.

  3. Visit the web UI at http://YOURSERVER/nagios3/. You can log in using nagiosadmin as a username, and the password, which you selected in the previous step. Since this system requires you to log in, you'll want to follow the instructions in the Apache chapter to configure and require SSL/TLS for the system.

How it works…

Debian and Ubuntu have done most of the hard work of determining how to configure Nagios for you. Once you install the nagios3 meta package and all of its dependencies, you automatically get a...