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Paravirtualization With Xen On CentOS 5.3 (x86_64)
This tutorial provides step-by-step instructions on how to install Xen (version 3.0.3) on a CentOS 5.3 (x86_64) system. Xen lets you create guest operating systems (*nix operating systems like Linux and FreeBSD), so called "virtual machines" or domUs, under a host operating system (dom0). Using Xen you can separate your applications into different virtual machines that are totally independent from each other (e.g. a virtual machine for a mail server, a virtual machine for a high-traffic web site, another virtual machine that serves your customers' web sites, a virtual machine for DNS, etc.), but still use the same hardware. This saves money, and what is even more important, it's more secure. If the virtual machine of your DNS server gets hacked, it has no effect on your other virtual machines. Plus, you can move virtual machines from one Xen server to the next one.
Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (CentOS 5.3 x86_64)
This document describes how to install a Postfix mail server that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database used by Postfix.
How To Install Openbravo ERP On CentOS 5.2
This howto describes how to set up Openbravo ERP (enterprise management system) on CentOS 5.2 using PostgreSQL 8.3. Openbravo is an open source ERP solution designed specifically for the SME (small to midsize firm). Developed in a web based environment, it includes many robust functionalities which are considered part of the extended ERP: procurement and warehouse management, project and service management, production management, and financial management.
The Perfect Server - CentOS 5.3 x86_64 [ISPConfig 2]
This tutorial shows how to set up a CentOS 5.3 server (x86_64) that offers all services needed by ISPs and web hosters: Apache web server (SSL-capable), Postfix mail server with SMTP-AUTH and TLS, BIND DNS server, Proftpd FTP server, MySQL server, Dovecot POP3/IMAP, Quota, Firewall, etc. This tutorial is written for the 64-bit version of CentOS 5.3, but should apply to the 32-bit version with very little modifications as well. In the end you should have a system that works reliably, and if you like you can install the free webhosting control panel ISPConfig (i.e., ISPConfig runs on it out of the box).
iRedMail: Build A Full-Featured Mail Server With LDAP, Postfix, RoundCube, Dovecot, ClamAV,SpamAssassin, DKIM, SPF On CentOS 5.x
iRedMail: Build A Full-Featured Mail Server With LDAP, Postfix, RoundCube, Dovecot, ClamAV, DKIM, SPF On CentOS 5.x
iRedMail is a shell script that lets you quickly deploy a full-featured mail solution in less than 2 minutes on CentOS 5.x and Debian (Lenny) 5.0.1(it supports both i386 and x86_64). Its object is to make a Linux mail server installation and configuration simple and easy to use. iRedMail supports both OpenLDAP and MySQL as backends for storing virtual domains and users.This tutorial shows how to use the OpenLDAP as the backend.
Virtualization With KVM On A CentOS 5.2 Server
This guide explains how you can install and use KVM for creating and running virtual machines on a CentOS 5.2 server. I will show how to create image-based virtual machines and also virtual machines that use a logical volume (LVM). KVM is short for Kernel-based Virtual Machine and makes use of hardware virtualization, i.e., you need a CPU that supports hardware virtualization, e.g. Intel VT or AMD-V.
Building HAVP On CentOS 5.x
HAVP (HTTP Antivirus Proxy) is a proxy with a ClamAV anti-virus scanner. The main aims are continuous, non-blocking downloads and smooth scanning of dynamic and password protected HTTP traffic. Havp antivirus proxy has a parent and transparent proxy mode. It can be used with squid or standalone. Its older rpms & src.rpms (0.86) don't work (i.e. conflict with the updated clamav), and newer rpm * src.rpm don't exist yet. So HAVP needs to be re-compiled. This guide shows how to build HAVP on CentOS 5.x.
Set Up DKIM On Postfix With dkim-milter (CentOS 5.2)
DKIM is an authentication framework which stores public-keys in DNS and digitally signs emails on a domain basis. It was created as a result of merging Yahoo's domainkeys and Cisco's Identified Internet mail specification. It is defined in RFC 4871. We will be using the milter implementation of dkim http://dkim-milter.sf.net on CentOS 5.2.
The Perfect Server - CentOS 5.2 [ISPConfig 3]
This tutorial shows how to prepare a CentOS 5.2 server for the installation of ISPConfig 3, and how to install ISPConfig 3. ISPConfig 3 is a webhosting control panel that allows you to configure the following services through a web browser: Apache web server, Postfix mail server, MySQL, MyDNS nameserver, PureFTPd, SpamAssassin, ClamAV, and many more.
OpenVPN Server On CentOS 5.2
So your users need access to Exchange and data from outside your organisation. Sure you can set up RPC over HTTPS and various other tools to access the data. I just find OpenVPN very good, convenient and reliable.