nu11secur1ty nu11secur1ty

Warning:

The use of direct cable connections without network switches is not supported for bonding. 
The failover mechanisms described here will not work as expected without the presence of network switches. 
See the Red Hat Knowledgebase article Why is bonding in not supported with direct connection using crossover cables? for more information.

Note:

The active-backup, balance-tlb and balance-alb modes do not require any specific configuration of the switch. 
Other bonding modes require configuring the switch to aggregate the links.

Installing ELK (CentOS (6 - NOTE: with your own modified) ,7)

Introduction

In this tutorial, we will go over the installation of the Elasticsearch ELK Stack on CentOS 7—that is, Elasticsearch 2.1.x, Logstash 2.1.x, and Kibana 4.3.x. We will also show you how to configure it to gather and visualize the syslogs of your systems in a centralized location, using Filebeat 1.0.x. Logstash is an open source tool for collecting, parsing, and storing logs for future use. Kibana is a web interface that can be used to search and view the logs that Logstash has indexed. Both of these tools are based on Elasticsearch, which is used for storing logs.

Centralized logging can be very useful when attempting to identify problems with your servers or applications, as it allows you to search through all of your logs in a single place. It is also useful because it allows you to identify issues that span multiple servers by correlating their logs during a specific time frame.

It is possible to use Logstash to gather logs of al

	## Configure eth0
	#
	# vi /etc/sysconfig/network-scripts/ifcfg-eth0

	DEVICE="eth0"
	NM_CONTROLLED="yes"
	ONBOOT=yes
	HWADDR=A4:BA:DB:37:F1:04
	TYPE=Ethernet
	BOOTPROTO=static