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

Setting up a nameserver for your public domain

Setting up a nameserver for a public domain works the same way as setting up a DNS server for an internal hostname, just with a few additional parts that we'll want to make sure are in a good state.

How to do it...

Let's set up a nameserver for a public domain:

  1. Set up a properly configured SOA record:  IN  SOA (
  2. Set up a record for NS hosts:

    Ns1    IN      A
  3. Set up glue records:

           IN      NS
    Ns1    IN      A

How it works…

The first step is to configure the start of authority (SOA) for your domain. The SOA provides basic information about the zone itself. It contains a number of fields, including:

  • The zone.

  • IN: Class of the record. IN is Internet, which you'll see for the majority of DNS records that you see.

  • SOA: Start of authority.

  • This is the primary...