Server

As security becomes more of an issue for all businesses, Nagios can be used to cover some of those 
security details. In this article Nagios is used to located network cards that may be in the process 
of sniffing network traffic.
 

This is an interesting feature in Webmin that provides a way to monitor daemons on the server and notify administrators of down services. Webmin attempts to implement many of the standard functions of the more full featured Nagios.

Email management and troubleshooting can be a challenge as there are so many options and configuration choices that can get twisted.

NRDS, Nagios Remote Data Sender, is a component of Nagios XI that provides a passive method of communication. The unique aspect of NRDS is that on the Nagios server the administrator can design and build the configuration for multiple operating systems and then deploy those configurations with the plugins to the client.

Nagios 2012 provides a lot of significant changes to the interface. One of those large changes is to the Business Process Intelligence which allows you to set up checks based on groups of services and hosts that support one business application.

The Automated Host Management feature allows for the use of an application like Puppet. Administrators can either create the config file manually or copy the configuration files from another XI or Core server.

Ever wonder who made the changes to Nagios that hosed the system? Try to get confessions but everyone seemed to not know anything? The new audit log on Nagios 2012 may help track down changes and create greater accountability for administrators.

Normally, Postfix delivers mail to the user directly. However, there are situations where you will want to create a local or remote alias. It is important for Postfix to be able to use the alias file on the server (/etc/aliases).

Webmin can be used to create and edit mail aliases which can be used to send mail to individuals, groups, lists or even applications. Webmin is a web based front end used for monitoring Linux servers which have no GUI.

This module allows you to create and edit the scripts that are run at bootup and shutdown time, called actions by the module. It can be found under the System category in Webmin, and when you enter it the main page will display a list of all available actions, whether they are started at boot and a short description for each.