If you use postfix and / or amavisd-new on the mail server, you can use the following recipes to block emails with executable (exe, bat, scr) attachments. Block the attachments with a postfix header filter In ISPConfig, click on "Email in the upper menu, then on "Content filter" in the left menu and click on ... Read more
Sometimes you might have to work with the Spamassin Bayes Token database. This is the database that is used by the SpamAssassin Self Learning (Bayesian) Classifier to store the ham and spam tokens. This tutorial will show you how to make a backup of that database. E.g. when you want to move it to a ... Read more
NOTE: This post is about ISPConfig 3.0 and not 3.1 and newer. ISPConfig 3.1 and newer has DKIM support builtin, you can simply enable DKIM in ISPConfig 3.1 GUI now for the mail domain. DKIM is a system to verify the sender and integrity of emails. ISPConfig 3 uses amavisd-new as content filter for spam ... Read more
The pure-ftp daemon by default has a recursion limit of 2000 files, this prevents the server from showing more then 2000 files when you browse a directory with an FTP client. To expand this Limit to e.g 5000 files, create or edit the file /etc/pure-ftpd/conf/LimitRecursion and add a line "5000 500". The first number is the ... Read more
The Webalizer package in Debian 6 has currently small bug as the required package for the GeoIP database is not installed automatically when Webalizer is installed. The symptoms are that Webalizer statistics was not created and this error message is displayed when Webalizer is run: Error Opening file /usr/share/GeoIP/GeoIP.dat The solution is to install the ... Read more
This step by step tutorial will guide you to set up active directory on your Windows Server 2012 R2 machine. The article has been divided into following two parts: 1. Installing active directory on a machine 2. Promoting that machine to act as a domain controller Prerequisites To follow this tutorial, you need to ensure ... Read more
If you use mod_security on your server you might encounter that a website script is not compatible with mod_security. To disable mod_security (v2) for a website, add the following code into the apache directives field: <IfModule mod_security2.c> SecRuleEngine Off </IfModule> For the older mod_security 1 version, use these configuration directives: <IfModule mod_security.c> SecFilterEngine Off </IfModule> ... Read more
High page speed and short page load times of your website are essential for good search engine rankings today. In this FAQ, I will show you how to enable caching of graphic and CSS files in apache on Ubuntu and Debian. The first step is to enable the expires module in apache: a2enmod headers expires ... Read more
The SCP command line is commonly used to copy files over SSH, and between popular Operating systems like Linux, Mac and Windows in a secure fashion. SCP is used to copy files to/from a remote server. It also allows you to copy files from one remote server to another remote server, without passing traffic through your PC.
When you get a 500 error in a webpage hosted on Debian Linux (6.0) with apache webserver and fastcgi, take a look into the apache error.log file. This can either be the global error.log or the error.log of the website where you got the error. If you find a error similar to this one: [Fri Apr ... Read more