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Tuesday, 27 November 2012 00:00

High available DHCP in Windows 2012


In this tutorial we will configure highly available DHCP in windows 2012 operating system using the two servers DC01 and DC02 with IP &

Deploy in DC01 and DC02 DHCP feature

In this step, we will deploy new DHCP services to DC01 and DC02.

Wednesday, 28 November 2012 00:00

Deploy a second domain controller Windows 2012


In this lab, We will use Server Manager to deploy remote domain controllers to DC03.

Add Active Directory Domain Services

In this step, We will add the Active Directory Domain Services role in remote server which is required before configuring the server as a domain controller. In order to accomplish it, we will go to server manager, manage and then click add roles and features. In the next window will choose the destination server DC03, after we will choose Active Directory Domain Services (Picture 1).


In this article we present the basic commands to configure a cisco 2960 catalyst switch.

Thursday, 06 December 2012 00:00

Configure Oracle 10g Recovery settings


In this article we enable the archivelog and flashback in Oracle database 10g. The benefits of archivelog and flashback are:
1. We can able to take database backup online.
2. No Need to Down Oracle DB Server
3. We can better Manage our Backup Policy through RMAN
4. Limited DBA task
5. We can able to recover our database to a specific point-in-time


This article explain how to configure snmp community strings in cisco router or switch in order to receive data from them.

Enable snmp community strings

The procudure is as follows:After connecting to the network appliance in the exec mode go to into the configuration mode with #configure 


The article describes how to monitor vmware infrastructure with nagios and centreon . For the installation we using Centos 6.4 server


First we need to Install some Perl dependencies

# yum install perl-CPAN

Download VMWare Perl SDK from the following link (it needs login first)

Then we go to the root directory of linux and install it

# tar xvzf VMware-vSphere-Perl-SDK-5.1.0-780721.x86_64.tar

# cd vmware-vsphere-cli-distrib/

# ./

We follow the default instructions and when the setup finishes download the plugin from the following link:;a=blob;;h=4996301e194ec7966b632811815c14dc3e715cb8;hb=a34fe507ebf78b9dd4fe2ed91c3324d78cee67f8

Then we copy it  to /usr/local/nagios/libexec and make it executable

# cd /usr/local/nagios/libexec

# chmod a+x

In the following picture we can see the net usage graph of esxi host after the iinstallation of services on Nagios


                                                      Picture 1: Esxi net usage

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