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

Adding Nagios users

Nagios automatically creates the nagiosadmin user with full access rights to the system, but if you're operating in a larger environment, you will likely want to provide additional user accounts for other users to connect to. This will allow you to use a finer grained access control as well as making your life easier, as employees come and go in the company.

How to do it…

  1. Create the user account:

    htpasswd /etc/nagios3/htpasswd.users user
  2. Alternatively, you can reconfigure Apache to use system authentication for Nagios by editing /etc/apache2/conf-available/nagios3 to read:

    <IfModule mod_authnz_external.c>
            AddExternalAuth pwauth /usr/sbin/pwauth
            SetExternalAuthMethod pwauth pipe
    <DirectoryMatch (/usr/share/nagios3/htdocs|/usr/lib/cgi-bin/nagios3|/etc/nagios3/stylesheets)>
            Options FollowSymLinks
            DirectoryIndex index.php index.html
            AllowOverride AuthConfig
            Order Allow,Deny
            Allow From All...