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

Joining a Linux box to the domain

In order to participate in an AD style domain, you must have the machine joined to the domain using Administrator credentials. This will create the machine's account within the database, and provide credentials to the system for querying the ldap server.

How to do it…

  1. Install Samba, heimdal-clients, and winbind:

    sudo apt-get install winbind
  2. Populate /etc/samba/smb.conf:

        workgroup = EXAMPLE
        realm =
        security = ads
        idmap uid = 10000-20000
        idmap gid = 10000-20000
        winbind enum users = yes
        winbind enum groups = yes
        template homedir = /home/%U
        template shell = /bin/bash
        winbind use default domain = yes
  3. Join the system to the domain:

    sudo net ads join -U Administrator
  4. Configure the system to use winbind for account information in /etc/nsswitch.conf:

    passwd:         compat winbind
    group:          compat winbind

How it works…

Joining a Linux box to an AD domain, you need to utilize winbind that provides a PAM...