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How To Combat Viruses Using Your Postfix Configuration

How To Combat Viruses Using Your Postfix Configuration 

In this guide you will learn how to tweak the HowtoForge mail guide for  Postfix (+Auth SMTP + Quota), http://www.howtoforge.com/virtual_postfix_mysql_quota_courier, setup to give better Virus protection.  Sadly this always comes at a price as you will see later on.....

Building A Virtual Server (VPS) With Debian 3.1 (Sarge) And OpenVZ

Building A Virtual Server (VPS) With Debian 3.1 (Sarge) And OpenVZ

In this HowTo I will describe the steps to be taken to prepare a server for OpenVZ virtual machines on Debian 3.1 (Sarge) 32Bit Linux. With OpenVZ you can create multiple Virtual Private Servers (VPS) on the same hardware, similar to Xen and the Linux Vserver project. OpenVZ is the open-source branch of Virtuozzo, a commercial virtualization solution used by many providers that offer virtual servers. The OpenVZ kernel patch is licensed under the GPL license, and the user-level tools are under the QPL license.

Flash Player 9 on Linux (Ubuntu Dapper Drake)

Flash Player 9 on Linux (Ubuntu Dapper Drake)

This tutorial shows how to install the Flash player on a Linux system. It was tested on Dapper Drake (on an x86 - 32 bit machine).

LDAP Authentication In Linux

LDAP Authentication In Linux 

This howto will show you howto store your users in LDAP and authenticate some of the services against it. I will not show howto install particular packages, as it is distribution/system dependant. I will focus on "pure" configuration of all componenets needed to have LDAP authentication/storage of users. The howto assumes somehow, that you are migrating from a regular passwd/shadow authentication, but it is also suitable for people who do it from scratch.

Linux GPRS/EDGE via Bluetooth HOWTO

Linux GPRS/EDGE via Bluetooth HOWTO

In this guide I will show you howto configure internet access through GPRS/EDGE, using bluetooth connection with your GSM phone.

I am using gentoo and Nokia 6310i phone, but this will work with any distribution and any bluetooth capable phone.

[Debian Sarge] Installing A Bind9 Master/Slave DNS System

[Debian Sarge] Installing A Bind9 Master/Slave DNS System 

In this howto we will install 2 bind dns servers, one as the master and the other as a slave server. For security reasons we will chroot bind9 in its own jail.
Using two servers for a domain is a commonly used setup and in order to host your own domain you are required to have at least 2 domain servers. If one breaks, the other can continue to serve your domain.

How To Fight Spam Using Your Postfix Configuration

How To Fight Spam Using Your Postfix Configuration

In this guide you will learn how to tweak the mail guide for  Postfix (+Auth SMTP + Quota), http://www.howtoforge.com/virtual_postfix_mysql_quota_courier, setup to better combat SPAM and allow a little bit of backward compatibilty of the older Qmail systems.

Securing the CentOS Perfect Setup with Bastille

Securing the CentOS Perfect Setup with Bastille

This article shows how to secure a CentOS server using psad, Bastille, and some other tweaks. psad is a tool that helps detect port scans and other suspicious traffic, and the Bastille hardening program locks down an operating system, proactively configuring the system for increased security and decreasing its susceptibility to compromise.

How To Monitor A System With Sysstat On Centos 4.3

How To Monitor A System With Sysstat On Centos 4.3

A common task for System Administrators is to monitor and care for a server. That's fairly easy to do at a moment's notice, but how to keep a record of this information over time?  One way to monitor your server is to use the Sysstat package.

Sysstat is actually a collection of utilities designed to collect information about the performance of a linux installation, and record them over time.

Create Incremental Snapshot-style Backups With rSync And SSH

Create Incremental Snapshot-style Backups With rSync And SSH

As neither human nor computers are perfect (humans err / computers may fail) it is quite obvious that a good backup system will prevent from too much damage once the computer may go down. This could be either because the harddrive is failing or because of hackers or because you accidentally deleted something important.

In this tutorial I will show you how to automate backups automatically in an incremental snapshot-style way by using rSync.

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