IPSURE (Hands-On)

Enabling Roundcube Vacation Removes Actual PostfixAdmin Aliases

Sezgin Bayrak — Sun, 29 Jan 2012 10:35:00 +0000

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:

“queue file size limit exceeded” warning, Postfix Message Size Limit Mystery

Sezgin Bayrak — Thu, 15 Dec 2011 17:47:53 +0000

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:

Monitoring & Management of Postfix System on FreeBSD

Sezgin Bayrak — Sun, 13 Nov 2011 07:30:44 +0000

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:

What is new in Windows 8 Server and installation of it?

Mehmet Bora Teoman — Sun, 30 Oct 2011 10:39:22 +0000

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:

Step by Step Guide for System Center Virtual Machine Manager 2012 Beta – 05

Mehmet Bora Teoman — Wed, 12 Oct 2011 13:51:03 +0000

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:

Fsmoroleowner problem during 2003-2008 Active Directory transition

Mehmet Bora Teoman — Wed, 05 Oct 2011 09:49:12 +0000

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:

Roundcube setup (by also fixing Vacation and Quota Warning issues) on FreeBSD

Sezgin Bayrak — Sat, 24 Sep 2011 17:44:47 +0000

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:

What is new in VMware Workstation 8?

Mehmet Bora Teoman — Fri, 23 Sep 2011 10:05:00 +0000

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

Adding Extra Layer Of Prevention to Maia with Sanesecurity

Sezgin Bayrak — Thu, 22 Sep 2011 21:24:42 +0000

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:

Maia Mailguard Setup on FreeBSD

Sezgin Bayrak — Wed, 21 Sep 2011 11:19:31 +0000

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:

Windows 8 installation on Vmware Workstation

Mehmet Bora Teoman — Tue, 20 Sep 2011 21:33:52 +0000

Hi everyone This is a new article and there won’t be much talk throughout this article. I will explain what I want to with screen captures mostly. The subject is (as you all understand from the title) Windows 8 operating system installation on VMware workstation product. Let’s start with the process. Microsoft released a Developer Preview edition [...] Related posts:

What is new in Windows 8?

Mehmet Bora Teoman — Sun, 18 Sep 2011 21:11:13 +0000

Last week Microsoft released the Developer Preview for its new operating system, Windows 8, to public. It is known that Windows 8 Final Release will be available in 2012. As all new operating systems come with improvements and differences, Windows 8 promises to give customers a new and improved Windows experience. Throughout this article, I [...] No related posts.

SpamAssassin–FuzzyOCR–ClamAV Setup on FreeBSD

Sezgin Bayrak — Sat, 17 Sep 2011 05:35:20 +0000

Welcome to SpamAssassin, FuzzyOCR and ClamAV setup stage of our “Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD” article series. Please take a look at our purposed setup list here. Through such cooperation mentioned above, a wide-spectrum spam filter, an optical character recognition (OCR) plugin and a high performance [...] Related posts:

PostfixAdmin Setup (with correct vacation settings) on FreeBSD

Sezgin Bayrak — Wed, 14 Sep 2011 15:23:11 +0000

Welcome to Postfix Admin setup stage of our “Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD” article series. Before continuing, you may like to glance at the complete setup list here. Postfix Admin is a web based management interface for Postfix MTA. It is a PHP based application that handles [...] Related posts:

Configuring Apache, Installing PHP and PHP5-Extensions for Postfix Setup

Sezgin Bayrak — Tue, 13 Sep 2011 19:33:24 +0000

Because the functionality of each web accesible components of “Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD” article series depends on Apache, PHP5 and relevant PHP5-Extensions, we have to satisfy the specific requirements of this trio. For this reason, this article does not feature an “Apache from scratch” installation, it [...] Related posts:

Postfix Setup on FreeBSD

Sezgin Bayrak — Tue, 13 Sep 2011 05:58:26 +0000

Welcome to Postfix setup stage of our “Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD” article series. Before continuing, you may like to glance at the complete setup list here. This setup replaces Sendmail which is the default MTA for a standard FreeBSD installation and enables Postfix virtual mailbox delivery [...] Related posts:

Step by Step Guide for System Center Virtual Machine Manager 2012 Beta – 04

Mehmet Bora Teoman — Sun, 11 Sep 2011 15:39:17 +0000

Hello folks This is the fourth part of my article series about SCVMM 2012 Beta and by now, I install SCVMM 2012 Beta on my management server and configure the components in my fabric. In this part I will add a Hyper-V host to SCVMM 2012 and create a new cloud. Lets start with the addition [...] Related posts:

Dovecot setup (by also fixing Roundcube Quota Display, “Disk usage: unknown” issues)

Sezgin Bayrak — Sun, 11 Sep 2011 10:10:59 +0000

Welcome to Dovecot setup stage of our “Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD” article series. Before continuing, you may like to glance at the setup list here. This setup enables the usage of IMAP, IMAPS, POP3 and POP3S protocols together as the incoming server portion of the complete [...] Related posts:

Postfix (Virtual Setup) Dovecot SpamAssassin ClamAV Maia Roundcube (/w MySQL db) on FreeBSD

Sezgin Bayrak — Sun, 11 Sep 2011 10:10:47 +0000

Mainly through the fast, easy to administer and highly secure MTA (Mail Transfer Agent) structure of Postfix, the said combination in our post subject will offer you a trouble free corporate email system for even large scaled infrastructures, if you decide to build and manage your own email server. During this step-by-step article series, I’ll [...] Related posts:

Step by Step Guide for System Center Virtual Machine Manager 2012 Beta – 03

Mehmet Bora Teoman — Sun, 04 Sep 2011 19:32:16 +0000

Here is the third part of our SCVMM 2012 Beta article series and uptil now, I have talked about the new features that SCVMM 2012 offers to customers, the requirements for the installation of product on a single machine. I also explained the installation process on a Windows Server 2008 R2 operating system which also [...] Related posts:

Get Your FeedBurner Subscriber Count (Reader Statistics) with PHP and cURL

Sezgin Bayrak — Mon, 29 Aug 2011 08:04:28 +0000

Either for disposing your FeedBurner reader counts within your own CSS structure instead of using default FeedBurner chicklet or just for storing the data as for further references, you may want to grab the subscriber counts automatically in text format. We can accomplish this by using a small PHP – cURL script and FeedBurner’s Awareness [...] No related posts.

Outlook Web App access in an Exchange 2010 – Exchange 2003 coexistence scenario

Mehmet Bora Teoman — Fri, 26 Aug 2011 08:25:53 +0000

Hello folks In this new article, I want to talk about what has to be done during the implementation of Outlook Web App (OWA) in an Exchange 2010-Exchange 2003 coexistence scenario. Until all the mailboxes are transferred to the Exchange 2010 server, you have to make the legacy Exchange 2003 mailboxes reachable through an Exchange 2010 [...] Related posts:

Step by step guide for System Center Virtual Machine Manager 2012 Beta – 02

Mehmet Bora Teoman — Wed, 10 Aug 2011 12:28:02 +0000

Hi everyone This is the second part of the article series about SCVMM 2012 Beta product. In the first part, I talked about new features of SCVMM 2012 over previous versions and the requirements for product installation on a single machine. In this part, I will install the SCVMM 2012 Beta on a Windows Server 2008 [...] Related posts:

Step by step guide for System Center Virtual Machine Manager 2012 Beta – 01

Mehmet Bora Teoman — Fri, 05 Aug 2011 07:08:00 +0000

Hello friends This is a new article series about SCVMM 2012 Beta product. In the final release, probably new features will be added and will be slightly different from this Beta version but I think that final release will be more-or-less the same with Beta. Therefore, I write an article series about the product in Beta [...] Related posts:

Installation of SCVMM 2008 R2 on a single Windows Server 2008 R2 box

Mehmet Bora Teoman — Tue, 02 Aug 2011 07:08:42 +0000

Hi everyone, This article is about the installation of System Center Virtual Machine Manager 2008 R2 (SCVMM) on a Windows Server 2008 R2 box. As you already know, SCVMM is used to manage your virtual environment (not only Microsoft VMs but also ESX VMs). I want to explain the components of SCVMM first and then I [...] Related posts:

What is new in Hyper-V 2008 R2 SP1, Comparison between ESX and Hyper-V

Mehmet Bora Teoman — Sun, 31 Jul 2011 14:19:24 +0000

Hi folks This is a new article and I am back again :) In this article, I am going to explain what is coming new with Hyper-V in the newly released Service Pack 1 for Windows Server 2008 R2. I will also talk about the differences between hypervisors of R2 and R1. At the end, I [...] Related posts:

Changing Postfix Delivery to Dovecot LDA for Sieve and ManageSieve (within Roundcube) Support

Sezgin Bayrak — Sun, 26 Jun 2011 08:14:25 +0000

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 need for a direct filesystem access. If you want to use Sieve with your [...] Related posts:

Securing FreeBSD Console, How to Reset and Recover Lost root Password

Sezgin Bayrak — Mon, 13 Jun 2011 13:18:35 +0000

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 human factor and declared procedures can be reversed meanwhile you suppose everything is going fine. The conflicts [...] No related posts.

OCS 2007 R2 Communicator Web Access Installation and Configuration

Mehmet Bora Teoman — Sun, 15 May 2011 17:39:48 +0000

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 OCS with web browsers. By now, it supports IE, Firefox and Safari browsers. First of [...] Related posts:

eAccelerator (as a Zend extension) High Load Averages Issue

Sezgin Bayrak — Fri, 22 Apr 2011 09:51:37 +0000

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. conditions, we have noticed that Apache repeatedly launches child processes untill it reaches the [...] Related posts:

PHP Acceleration with eAccelerator and Shared Memory Tweaking

“This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator.” error in Excel 2010

Mehmet Bora Teoman — Sat, 09 Apr 2011 18:23:49 +0000

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 folder), it gives the error message “This operation has [...] No related posts.

Office Communications Server 2007 R2 installation and configuration – 9

Mehmet Bora Teoman — Sun, 20 Feb 2011 19:47:02 +0000

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, it would be good to have [...] Related posts:

Office Communications Server 2007 R2 installation and configuration – 8

Mehmet Bora Teoman — Sun, 20 Feb 2011 19:37:59 +0000

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 product and explain a sample filter configuration. Lets start. When we look carefully to the configuration options of [...] Related posts:

Office Communications Server 2007 R2 installation and configuration – 7

Mehmet Bora Teoman — Sun, 20 Feb 2011 12:12:36 +0000

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 client softwares that we can use to benefit from OCS 2007 R2 infrastructure. To [...] Related posts:

Office Communications Server 2007 R2 installation and configuration – 6

Mehmet Bora Teoman — Sat, 12 Feb 2011 09:47:53 +0000

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 settings for OCS infrastructure. To administer an OCS 2007 R2 server, I have to install Administration Tools [...] Related posts:

E-mail Usage and Administration Policy

Mehmet Bora Teoman — Mon, 17 Jan 2011 20:56:19 +0000

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 mailing system. I think this subject is not much emphasized but more interest has to be [...] No related posts.

Trac and Subversion (SVN) on FreeBSD

Sezgin Bayrak — Tue, 11 Jan 2011 11:57:38 +0000

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 clients to erect a Subversion platform for their development team in order to manage [...] No related posts.

Office Communications Server 2007 R2 installation and configuration – 5

Mehmet Bora Teoman — Mon, 27 Dec 2010 17:35:26 +0000

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 series, I explained the whole installation process as I did it on a Windows Server [...] Related posts:

NFS (Network File System) and Server / Client Configuration on FreeBSD

Sezgin Bayrak — Sat, 25 Dec 2010 14:33:03 +0000

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 conduced to the development of “distributed filesystems (DF)”. DF(s) provide this location transparency to the clients by hiding the [...] No related posts.

Office Communications Server 2007 R2 installation and configuration – 4

Mehmet Bora Teoman — Mon, 15 Nov 2010 16:50:40 +0000

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 installation of Archiving Server. In this part, I will install the Front-end OCS Server, add [...] Related posts:

Office Communications Server 2007 R2 installation and configuration – 3

Mehmet Bora Teoman — Sun, 14 Nov 2010 20:44:44 +0000

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 server installation and shared folders creation. In this part, I will [...] Related posts:

Office Communications Server 2007 R2 installation and configuration – 2

Mehmet Bora Teoman — Sat, 13 Nov 2010 23:28:36 +0000

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 be used before OCS implementation in production environment). In this part, I [...] Related posts:

Office Communications Server 2007 R2 installation and configuration – 1

Mehmet Bora Teoman — Thu, 04 Nov 2010 07:58:36 +0000

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 the OCS is, what we can do with OCS and what [...] Related posts:

Chrooted SFTP with Public Key Authentication

Sezgin Bayrak — Tue, 12 Oct 2010 07:59:22 +0000

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 than you suppose, especially if ever the data you transfer start to possess a great commercial value as you [...] Related posts:

SSH Public Key (/w RSA) Authentication and SSH Tunneling – Part 1

DomainKeys with Postfix Using dk-milter (SMTP-Only)

Sezgin Bayrak — Wed, 22 Sep 2010 23:13:56 +0000

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 Postfix by dk-milter on a FreeBSD box. Both of these PGP-like methodologies are used for aiding [...] Related posts:

DomainKeys Identified Mail (DKIM) with Postfix (SMTP-Only)

Sezgin Bayrak — Sat, 18 Sep 2010 19:37:26 +0000

DKIM is a sender authentication scheme for signing messages in a way that these messages can be validated by the recipient side. DKIM, which is usually a part of MTA, is based on public-key cryptography therefore the validation process naturally depends on public-private key pair. Signer MTA affixes a digital signature into the message header [...] Related posts:

Active Directory Replication – 2

Mehmet Bora Teoman — Thu, 02 Sep 2010 12:00:40 +0000

Hi everyone Here is the second part of our AD DS Replication article. In first part, I talked about the techniques and mechanisms that are used in AD DS replication process. In this part, I will illustrate how an AD DS replication occurs after Active Directory modifications on an example scenario. Our example scenario includes the [...] Related posts:

Active Directory Replication – 1

Mehmet Bora Teoman — Wed, 25 Aug 2010 09:10:52 +0000

Hi everyone This article is about the replication mechanism of Active Directory Domain Services (AD DS). I will talk about the techniques that are used in AD DS replication and illustrate how an AD DS replication occurs after an Active Directory modification. Let me first introduce you what the Active Directory replication is and why it [...] Related posts:

Standard vs Form-based authentication for Exchange 2007 OWA

Mehmet Bora Teoman — Wed, 11 Aug 2010 09:07:54 +0000

Hi everyone The subject for this article is the authentication methods of Exchange 2007 Outlook Web Access (OWA). Throughout the article I will talk about the authentication methods, their advantages and disadvantages, how they are configured and therefore give a brief and clear understanding about the authentication methods of OWA to you. Lets begin with the [...] Related posts:

Clustering MS SQL Server 2008 R2 on VMware Virtual Windows Server 2008 R2 – 3

Mehmet Bora Teoman — Thu, 22 Jul 2010 13:18:53 +0000

Hi folks This is the third and the last part of our article series about MS SQL Server 2008 R2 clustering and untill now we completed the creation of virtual machines and Windows clustering on them. In this last part, I will install MS SQL Server 2008 R2 on these virtual clustered machines. But first of [...] Related posts: