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vSphere Client 5.0
Published on 2012-04-10 09:39:59
Hi everyone The previous two articles were about ESXi 5 and vCenter Server 5 installations. This time I am going to talk about the installation of vSphere Client which is the main management console of VMware virtualization environment. First, I will explain the step by step installation of it (which is too easy) and then I [...] Related posts:Clustering MS SQL Server 2008 R2 on VMware Virtual Windows Server 2008 R2 – 1 Clustering MS SQL Server 2008 R2 on VMware Virtual Windows Server 2008 [..] > read more
VMware vCenter Server 5 installation
Published on 2012-03-22 09:09:17
Hello friends This article is a continuation of ESXi 5 installation article and I will show you how you can install vCenter Server for your virtualization environment. The vCenter Server is the core component for VMware virtualization and is used to manage the hosts, virtual machines, resources etc. So let me first show you what you [...] Related posts:Windows 8 installation on Vmware Workstation Clustering MS SQL Server 2008 R2 on VMware Virtual Windows Server 2008 R2 – 1 What is new in VMw [..] > read more
ESXi 5 Installation
Published on 2012-03-17 16:37:23
Hi everyone It has been a long time since my last article. I have been very very busy therefore couldn’t find time to write. But now I am back again :) . I hope you are all well. This article is the first part of a Vmware vSphere environment deployment article series. Throughout this series, I [...] Related posts:VMware vCenter Server 5 installation Windows 8 installation on Vmware Workstation What is new in VMware Workstation 8? > read more
“TROUBLE in check_mail: spam_scan FAILED: DBD::mysql::st execute failed: Column ‘theme_id’ cannot be null at /usr/local/sbin/maiad line 3408″ Error Message Thrown by Maia Mailguard
Published on 2012-03-14 14:32:26
This problem occurs if you have enabled the auto-creation of user accounts in System Configuration of Maia 1.0.3. At least we met this error message in version 1.0.3.r1575_1. It is triggered in the validation call when checking the “theme_id” while maiad is trying to create the relevant user account that received its first message. Actually [...] Related posts:Maia Mailguard 1.0.3.rx Installation and Configuration on FreeBSD. The Differences. Maia Mailguard Setup on FreeBSD Disabli [..] > read more
Character Encoding Problem under “Name” field in PostfixAdmin 2.3.5
Published on 2012-03-13 18:59:14
By the new release of PostfixAdmin 2.3.5, a character encoding problem appeared under “Name” column of PostfixAdmin. Naturally, this situation concerns the people who are using non-ASCII characters inside their full names. At first appearance it might be supposed to be related to UTF-8 settings of PHP or MySQL server, but no, it isn’t. Anyway, [...] Related posts:PostfixAdmin Setup (with correct vacation settings) on FreeBSD Enabling Roundcube Vacation Removes Actual PostfixA [..] > read more
Upgrading ClamAV on FreeBSD (by using portupgrade)
Published on 2012-03-09 09:57:42
Yes, a simple topic. However, although regularly upgrading an outdated engine is a known necessity for those systems running ClamAV as their virus scanner, there’s not much, even no clear document expressing such an easy and common task directly without getting things complicated. We wanted to touch on this subject in order to state the [...] Related posts:SpamAssassin FuzzyOCR ClamAV Setup on FreeBSD Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on Fre [..] > read more
Dkim-milter is No Longer Available, How to Use OpenDKIM Instead
Published on 2012-03-03 05:23:49
When we implemented DomainKeys Identified Mail (DKIM) with Postfix on FreeBSD, we had used dkim-milter plugin. However, it seems that dkim-milter has expired and recently it has been removed from the ports tree. Consequently, we’ll also move to OpenDKIM which is in fact claimed to be bug free compared to dkim-milter. Installation and configuration approach [...] Related posts:DomainKeys Identified Mail (DKIM) with Postfix (SMTP-Only) DomainKeys with Postfix Using dk-milter (SMTP-Only) Po [..] > read more
Disabling Outgoing Spam Scans In Maia Mailguard
Published on 2012-02-27 12:00:10
There may be two leading reasons of trying to disable outgoing spam scans in a corporate email system; The risk of overwhelming the system resources and the fear of false positives. Regardless of which one is yours, doing so causes another drawback that one of your local machines can someday become the origination of spam [...] Related posts:Maia Mailguard Setup on FreeBSD Maia Mailguard 1.0.3.rx Installation and Configuration on FreeBSD. The Differences. Adding Extra Layer Of Prevention to Ma [..] > read more
Maia Mailguard 1.0.3.rx Installation and Configuration on FreeBSD. The Differences.
Published on 2012-02-20 13:57:16
Last year in September, we published “Maia Mailguard Setup On FreeBSD” as the sixth article of the compelete Postfix email system guide. Overlapping the new release of FreeBSD, new Maia version also has some major changes in its layout and mechanics. Therefore, we decided to post a quick essay over the new installation and configuration [...] Related posts:Maia Mailguard Setup on FreeBSD Adding Extra Layer Of Prevention to Maia with Sanesecurity Postfix (Virtual Setup) Dovecot Spam [..] > read more
Enabling Roundcube Vacation Removes Actual PostfixAdmin Aliases
Published on 2012-01-29 04:35:00
PostfixAdmin is a GUI which we use frequently to manage our users and domains in a Postfix system. Creating email aliases and “Forward only” redirections are the most regular tasks we carry out while managing it. Likewise, Roundcube is a free, convenient solution for the webmail demands and the vacation plugin is the indispensable component [...] Related posts:Roundcube setup (by also fixing Vacation and Quota Warning issues) on FreeBSD PostfixAdmin Setup (with correct vacation set [..] > read more
“queue file size limit exceeded” warning, Postfix Message Size Limit Mystery
Published on 2011-12-15 11:47:53
When you send an email with a large attachment which you think it complies with the size limits designated inside your postfix configuration, you’ll most probably be still getting “Dec 14 21:35:59 mail postfix/smtpd[55736]: warning: D9105A1BAD1: queue file size limit exceeded” error message inside your server maillog. If this happens, you won’t even get [...] Related posts:Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD Monit [..] > read more
Monitoring & Management of Postfix System on FreeBSD
Published on 2011-11-13 01:30:44
Welcome to the final stage of our “Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD” article series. Before proceeding, you may like to check out the setup list here. The truth of the matter is that you mainly perform Postfix management tasks through PostfixAdmin web interface which we have just explained [...] Related posts:Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD Postfix Setup on FreeBSD > read more
What is new in Windows 8 Server and installation of it?
Published on 2011-10-30 05:39:22
Hello again. This is another article about Windows 8. But this time I will talk about the server version of this operating system. As you all know, approximately 1 month ago, Microsoft made the Developer Preview of its next generation operating system available through its MSDN website. The installation of the operating system is [...] Related posts:Windows 8 installation on Vmware Workstation WDS Installation (Windows Server 2008 R2) – Day 2 Step by step installation of Sharepoint Serv [..] > read more
Step by Step Guide for System Center Virtual Machine Manager 2012 Beta – 05
Published on 2011-10-12 08:51:03
This is the fifth part of the article series about SCVMM 2012 Beta and until now, I have installed SCVMM 2012 Beta on my management server and configured the components in my fabric. I also added a Hyper-V host to SCVMM 2012 and created a new cloud. In this fifth and final part, I will [...] Related posts:Step by Step Guide for System Center Virtual Machine Manager 2012 Beta – 04 Step by step guide for System Center Virtual Machine Manager 2012 Beta – 01 Step by Step Guide for System C [..] > read more
Fsmoroleowner problem during 2003-2008 Active Directory transition
Published on 2011-10-05 04:49:12
Hi everyone, Last week one of my friends called me and talked about a problem that occured during the transition of Active Directory from 2003 to 2008 R2. It was a strange problem that I had never seen before therefore it took me some time to figure it out. Let me first draw the topology as [...] Related posts:Active Directory Replication – 2 Active Directory Replication – 1 Installation and Configuration of Active Directory Certificate Services on Windows Server 2008 R2 – 1 > read more
Roundcube setup (by also fixing Vacation and Quota Warning issues) on FreeBSD
Published on 2011-09-24 12:44:47
Welcome to Roundcube webmail setup stage of our “Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD” article series. Before continuing, please take a look at our complete setup list here. Roundcube is a free, multilingual IMAP web client with a stylish user interface which provides an awesome user experience by [...] Related posts:Dovecot setup (by also fixing Roundcube Quota Display, “Disk usage: unknown” issues) Enabling Roundc [..] > read more
What is new in VMware Workstation 8?
Published on 2011-09-23 05:05:00
Last week, VMware released new version of it’s workstation product “VMware Workstation 8.0”. This version is coming with 50+ new features and it can work directly with your cloud infrastructure now. In this article, I want to talk about some of the new features of this version and what these changes bring in to you. [...] Related posts:Windows 8 installation on Vmware Workstation > read more
Adding Extra Layer Of Prevention to Maia with Sanesecurity
Published on 2011-09-22 16:24:42
This is the optional Sanesecurity stage of our “Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD” article series. Here you can examine the complete list of steps we follow. Because we use ClamAV as one of our virus scanners, we have the opportunity to benefit from some of the signatures [...] Related posts:Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD Maia Mailguard Setup on FreeBSD > read more
Maia Mailguard Setup on FreeBSD
Published on 2011-09-21 06:19:31
Welcome to Maia Mailguard setup stage of our “Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD” article series. You may want to examine our purposed setup list here before proceeding. Maia Mailguard is a virus and spam management system built on SpamAssassin and amavisd-new scanner. It mainly supports scanning for [...] Related posts:SpamAssassin FuzzyOCR ClamAV Setup on FreeBSD Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/ [..] > read more
Changing Postfix Delivery to Dovecot LDA for Sieve and ManageSieve (within Roundcube) Support
Published on 2011-06-26 03:14:25
Sieve is a basic scripting language that can be used for running user devised, server-side filters as a part of a mail system. The ManageSieve protocol however, enables uploading and managing these Sieve scripts on a remote mail server without the ne > read more
Securing FreeBSD Console, How to Reset and Recover Lost root Password
Published on 2011-06-13 08:18:35
Security of the system console is more challenging than it appears as there is no precisely secure environment on earth where the physical access is entirely and only granted to you. In reality, all the environmental security measures depend on hum > read more
OCS 2007 R2 Communicator Web Access Installation and Configuration
Published on 2011-05-15 12:39:48
Hi folks In this article, I want to talk about the installation of Communicator Web Access (CWA) role for OCS 2007 R2 infrastructure. This role enables users to communicate via OCS infrastructure without installing client software. It lets you to use > read more
eAccelerator (as a Zend extension) High Load Averages Issue
Published on 2011-04-22 04:51:37
In one of our previous articles here, we had written about eAccelerator and metioned that it should significantly reduce the server load while increasing its speed from 1 to 10 times. But during the evaluation of eAccelerator under 1000+ http req/sec > read more
“This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator.” error in Excel 2010
Published on 2011-04-09 13:23:49
Hi everyone This article will be about an error I receive in Excel 2010 software. Actually the same error also affects Outlook 2010. Briefly it is a hyperlink problem and when I click a hyperlink in Excel 2010 (which opens a word document in the same > read more
Office Communications Server 2007 R2 installation and configuration – 9
Published on 2011-02-20 13:47:02
Archiving CDR reporter tool Now we are at the end of OCS article series and I want to talk about how we can read the data from archiving database. For an SQL administrator, to write a query and reach the desired data is not a big deal. But for others > read more
Office Communications Server 2007 R2 installation and configuration – 8
Published on 2011-02-20 13:37:59
Forefront For OCS 2007 Hi everyone In this article, I will try to explain “Forefront Security for Office Communications Server” product. This product is a complementary for OCS 2007 R2 software in security point of view. I will install the produc > read more
Office Communications Server 2007 R2 installation and configuration – 7
Published on 2011-02-20 06:12:36
Installation and usage of Office Communicator 2007 R2 and Live Meeting 2007 Clients Hi folks In this article, I will talk about the installation and usage of Office Communicator 2007 R2 and Live Meeting 2007 Clients. As you may know, these are the cl > read more
Office Communications Server 2007 R2 installation and configuration – 6
Published on 2011-02-12 03:47:53
Office Communications Server 2007 R2 infrastructure fundamental settings Hi folks In the previous five articles, I explained the installation of OCS and problems that were faced during OCS setup. In this part, I will try to explain some of the settin > read more
E-mail Usage and Administration Policy
Published on 2011-01-17 14:56:19
Hi everyone In this article, I want to talk about “Email Usage and Administration Policy”. “Email Usage and Administration Policy” aims to explain email usage to the end user and also tries to give few details about the administration of mail > read more
Trac and Subversion (SVN) on FreeBSD
Published on 2011-01-11 05:57:38
Trac was not our primary destination but it immediately became the significant part, following the installation of Subversion (SVN). Thereby this article arose and began to progress step by step last week when I received a request from one of my clie > read more
Office Communications Server 2007 R2 installation and configuration – 5
Published on 2010-12-27 11:35:26
What could befall you when building OCS infrastructure? In the previous parts, I built the OCS infrastructure. The operating system that I used was Windows Server 2008 R2 and the database version was SQL Server 2008 R2. But throughout the article ser > read more
NFS (Network File System) and Server / Client Configuration on FreeBSD
Published on 2010-12-25 08:33:03
Following the rapid progress in networked computing, the conventional file transfer protocols became incapable for fulfilling the particular needs of multiple hosts. The need to access the shared files transparently from multiple hosts over a network > read more
Office Communications Server 2007 R2 installation and configuration – 4
Published on 2010-11-15 10:50:40
Front-end Server installation Hello again, In the first three parts of our article series, I talked about what the OCS is, what we can do with OCS, what are the components of OCS infrastructure. I finished the creation of Enterprise Pool and installa > read more
Office Communications Server 2007 R2 installation and configuration – 3
Published on 2010-11-14 14:44:44
Enterprise Pool and Archive Server Hello again, In the first two parts of our article series, I talked about what the OCS is, what we can do with OCS, what are the components of OCS infrastructure. I also started to build my OCS environment with SQL > read more
Office Communications Server 2007 R2 installation and configuration – 2
Published on 2010-11-13 17:28:36
Network topology and Active Directory Preparation Hello again, In the first part, I talked about what the OCS is, what we can do with OCS and what are the components of OCS infrastructure. I also tried to explain what the Planning Tool is (which can > read more
Office Communications Server 2007 R2 installation and configuration – 1
Published on 2010-11-04 02:58:36
What is OCS and Planning Tool? Hi folks, It has been a long time and I am back with another article series :). This time I am going to talk about the Office Communications Server R2 (OCS) installation and configuration. This first part is about what > read more
Chrooted SFTP with Public Key Authentication
Published on 2010-10-12 02:59:22
Regarding the data transfer security, there are more concerns beyond the authentication weaknesses or the misuse of authorization. Whether it’s wired or wireless, your transmission environment is more likely to be under a packet sniffing threat > read more
DomainKeys with Postfix Using dk-milter (SMTP-Only)
Published on 2010-09-22 18:13:56
In my previous article, I spoke about DKIM and how to implement it with Postfix by using dkim-milter. In this article, we’ll be talking about DomainKeys which is confused with DKIM almost every time. Then we’ll be implementing it with Pos > read more