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Hi there! Welcome to my blog. My name is Ivan. I am a Dutch IT Professional working as Principal IT Consultant. Read more about me..

News, Problem Solutions and Other Interesting Information...

BitLocker: how to use Bitlocker encryption without TPM or USB?

Posted by Ivan
/ March 11, 2008 / 7 Comments

I wanted to learn how to use Bitlocker encryption. The requirement I had is to enable Bitlocker drive encryption on a virtual machine without a TPM security chip or access to USB devices. Before starting I read the Windows BitLocker Drive Encryption Step-by-Step Guide from Technet and I found following statement:...

Posted in Bitlocker, Windows Vista
Rode X/kruis op je harde schijf Windows Verkenner

Posted by Ivan
/ March 10, 2008 / 1 Comment

Ben je ook een slachtoffer van een virus/trojan of een adware programma en heb je een rode kruis wanneer je Deze Computer of Windows Verkenner opstart? Waarschijnlijk is je computer heel traag wanneer je verbinding maakt met het internet en allerelei pagina’s gaan open wanneer je Internet Explorer opstart. Wanneer...

Posted in Dutch, Windows
Verify your Windows Time service

Posted by Ivan
/ March 7, 2008 / 2 Comments

When I verify my time difference between my local system and the time.windows.com NTP server I see I have 11 seconds difference. Execute the following commands to check your local time service. Open a command prompt Type w32tm /stripchart /computer:time.windows.com /samples:5 /dataonly I trust Microsoft that they are well maintaining...

Posted in Windows
Active Directory: DCpromo answer file

Posted by Ivan
/ March 4, 2008 / Leave a comment

The following example demonstrates how to provision an Active Directory domain from an answer file. The installation of domain and domain controller role can be controlled from script and reproduced. This script has been generated for a Windows Server 2003. How to create answer file from DCPromo.exe? Copy the text...

Posted in Windows Active Directory
Openfiler service fails to start

Posted by Ivan
/ February 28, 2008 / Leave a comment

At some point my lab Openfiler was assigned static ip address and the iSCSI target stopped to function; also it was not reachable by the web interface at tcp port id 446 anymore. Several reboots did not help to solve the problem. What happened? The network interface configuration was changed....

Posted in Openfiler
Enable ICMP pings from the internal network ISA 2006

Posted by Ivan
/ February 4, 2008 / Leave a comment

The default firewall configuration in ISA 2006 is to deny all traffic from and to any host. I successfully configured the OWA publishing rule for Exchange 2007 but after my initial tests from the Exchange 2007 server I found out that ICMP was disabled. All hosts behind the internal network...

Posted in ISA 2006
Use Cacti to monitor your network latency

Posted by Ivan
/ February 3, 2008 / 33 Comments

If you are managing and monitoring a network you will probably be interested to keep an eye on the latency of your network links. Especially for those links which are connected with a dedicated internet connection and a IPSec VPN tunnel to the datacenter. Latency is predictable but for non...

Posted in Cacti, CentOS
CactiEZ 0.3 download and install tutorial VMWare Workstation

Posted by Ivan
/ January 27, 2008 / 6 Comments

In this tutorial I am going to show you how easy it is to install CactiEZ appliance and run this as a virtual guest appliance in VMWare Workstation. After the installation the virtual guest is portable and can be moved to a VMWare Server installation. Note from http://cactiusers.org what CactiEZ...

Posted in Cacti, VMWare
CentOS how to change hostname?

Posted by Ivan
/ November 21, 2007 / 37 Comments

I personally prefer to install CentOS as my linux distribution. Today I needed to change the hostname of my virtual guest machine running CentOS. How to change hostname of a CentOS system? There are several ways to do that but I am using the old way. VI is my friend and still...

Posted in CentOS