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How To Implement SPF In Postfix
This tutorial shows how to implement SPF (Sender Policy Framework) in a Postfix 2.x installation. The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery. There are lots of SPF extensions and patches available for Postfix, but most require that you recompile Postfix. Therefore we will install the postfix-policyd-spf-perl package from openspf.org which is a Perl package and can be implemented in existing Postfix installations (no Postfix compilation required).
Beginner's Guide To c++
This is a guide to the very basics of c++ its aimed at people who have never programmed in C++, it covers setting up the program, and also the basics of variable definition, commenting, the cout and cin function and basic operators.
Installing OTRS 2.14 (Open source Ticket Request System) on CentOS 4.4
OTRS is a trouble ticket system with many features to manage customer telephone calls and e-mails. The system is built to allow your support, sales, pre-sales, billing, internal IT, helpdesk, etc. department to react quickly to inbound inquiries. This How-To is specifically intended to help install and run OTRS (http://www.otrs.org). It is not intended to go over using, configuring, or administering OTRS. For those types of questions, please refer to the OTRS website.
The Perfect Desktop - Part 1: Fedora Core 6
With the release of Microsoft's new Windows operating system (Vista), more and more people are looking for alternatives to Windows for various reasons. This tutorial is the first of a series of articles where I will show people who are willing to switch to Linux how they can set up a Linux desktop (Fedora Core 6 in this article) that fully replaces their Windows desktop, i.e. that has all software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions, and the best thing is: all software comes free of charge.
Prevent Phishing with Mutual Authentication
Phishing is a man-in-the-middle attack. While many people think using time-bound, one-time passwords will solve the problem, they are wrong as attacks will just become automated. What is required is strong mutual authentication - authentication of the host to the user as well as the user to the host. This article demonstrates how to do that using open-source software from WiKID.
Convert Physical Windows Systems Into Virtual Machines To Be Run On A Linux Desktop
This article shows how you can convert a physical Windows system (XP, 2003, 2000, NT4 SP4+) into a VMware virtual machine with the free VMware Converter Starter. The resulting virtual machine can be run in the free VMware Player and VMware Server, and also in VMware Workstation and other VMware products. Vmware Converter comes in handy if you want to switch to a Linux desktop, but feel the need to run your old Windows desktop from time to time. By converting your Windows desktop into a virtual machine, you can run it under VMware Server/Player, etc. on your Linux desktop.
How to make a small change to a Debian tool and repackage it?
This mini-tutorial shows how to modify a small option of a standard Debian/Ubuntu package to accomodate your personal preferences and rebuild and install this package on your system.
Step-by-step OpenLDAP Installation and Configuration
This tutorial describes how to install and configure an OpenLDAP server and also an OpenLDAP client.
Run Your Own Webradio Station With Icecast2 And Ices2
This tutorial describes how to set up an audio streaming server with Icecast2. In order that Icecast2 can stream audio to listeners we install Ices2. Ices2 is a program that sends audio data to an Icecast2 server to broadcast to clients. Ices2 can either read audio data from disk (Ogg Vorbis files), or sample live audio from a sound card and encode it on the fly. In this article we will let Ices2 read .ogg files from the local hard disk.
How To Search For Missing Packages With apt-file On Debian and Ubuntu
This short article describes how you can search for missing packages with apt-file on Debian and Ubuntu systems. apt-file allows you to search for a file name, and it gives back the name(s) of the package(s) containing that file so that you can install the appropriate package.