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Virtual Users And Domains With Postfix, MailScanner, Mailwatch & MySQL On CentOS 5.1

Virtual Users And Domains With Postfix, MailScanner, Mailwatch & MySQL On CentOS 5.1

This document describes how to customize Falko's "Virtual Users And Domains" - setup for CentOS 5.1 so that it works with MailScanner and Mailwatch. The resulting system provides a web interface (Mailwatch) where you can manage quarantined emails, train SpamAssassin, edit the white- and blacklist, view configuration files and the detailed MySQL database status ...

Setting Up A PHP + MySQL Powered BitTorrent Tracker With RivetTracker

Setting Up A PHP + MySQL Powered BitTorrent Tracker With RivetTracker

Efficient file distribution is an important process for many websites online. BitTorrent makes this easier by sharing the uploading and downloading among clients. This alleviates the bandwidth required by the content provider. This tutorial will show you how to install RivetTracker, a PHP and MySQL driven BitTorrent tracker. RivetTracker is a heavily modified version of PHPBTTracker, written by "DeHackEd". It aims to be easy to use and manage.

Monitoring Multiple Systems With munin (Debian Etch)

Monitoring Multiple Systems With munin (Debian Etch)

In this article I will describe how you can monitor multiple systems with munin. munin produces nifty little graphics about nearly every aspect of your server (load average, memory usage, CPU usage, MySQL throughput, eth0 traffic, etc.) without much configuration. I will install the munin client on all systems that are to be monitored (including the munin server itself); the munin clients will then report to the munin server.

Osmo Personal Organizer On Fedora 8

Osmo Personal Organizer On Fedora 8

This document describes how to install and use Osmo on Fedora 8. Taken from the Osmo web page: "Osmo is a handy personal organizer, which includes calendar, tasks manager and address book modules. It was designed to be a small, easy to use and good looking PIM tool to help to manage personal information. In its current state the organizer is quite convenient to use - for example, the user can perform nearly all operations using the keyboard. Also, a lot of parameters are configurable to meet the user's preferences. On the technical side, Osmo is GTK+ based tool which uses a plain XML database to store all personal data."

Virtual Hosting Howto With Virtualmin On CentOS 5.1

Virtual Hosting Howto With Virtualmin On CentOS 5.1

This tutorial shows how to set up a CentOS 5.x server to offer all services needed by virtual web hosters. These include web hosting, smtp server with (SMTP-AUTH and TLS, SPF, DKIM, Domainkeys), DNS, FTP, MySQL, POP3/IMAP, Firewall, Webalizer for stats.

Chrooting Apache2 With mod_chroot On Debian Etch

Chrooting Apache2 With mod_chroot On Debian Etch

This guide explains how to set up mod_chroot with Apache2 on a Debian Etch system. With mod_chroot, you can run Apache2 in a secure chroot environment and make your server less vulnerable to break-in attempts that try to exploit vulnerabilities in Apache2 or your installed web applications.

Setting Up A High-Availability Load Balancer (With Failover and Session Support) With HAProxy/Heartbeat On Fedora 8

Setting Up A High-Availability Load Balancer (With Failover and Session Support) With HAProxy/Heartbeat On Fedora 8

This document describes how to set up a two-node load balancer in an active/passive configuration with HAProxy and heartbeat on Fedora 8. The load balancer acts between the user and two (or more) Apache web servers that hold the same content. The load balancer passes the requests to the web servers and it also checks their health. If one of them is down, all requests will automatically be redirected to the remaining web server(s). In addition to that, the two load balancer nodes monitor each other using heartbeat. If the master fails, the slave becomes the master - users won't notice any disruption of the service. HAProxy is session-aware - you can use it with any web application that makes use of sessions like forums, shopping carts, etc.

Install Firebird 2.0.3 Database Server On Ubuntu 7.10

Install Firebird 2.0.3 Database Server On Ubuntu 7.10

This tutorial explains how you can install the Firebird database server (version 2.0.3) on an Ubuntu 7.10 server.

Back Up Your Files With Fwbackups On Fedora 8

Back Up Your Files With Fwbackups On Fedora 8

This document describes how to set up, configure and use Fwbackups on a Fedora 8 desktop. The result is an easy-to-use backup system for desktop usage. Fwbackups creates partial backups which can be stored locally or on a removable device. You have also the option to run scheduled backups.

Increasing the security of PPTP by adding two-factor authentication to poptop

Security Issues and Poptop

PPTP does not have the best history in terms of security. The original Microsoft implementation for PPTP faired very poorly. MS-CHAPV2 solved these weaknesses - for wired networks. Unfortunately, back in 2004, Joshua Wright released a version of ASLEAP capable of brute-force attacking PPTP passwords in a wireless environment. As a systems administrator for the VPN, you can't tell if a user is connecting via some public WiFi service where someone might be running a tool like ASLEAP. Yet, the presense of PPTP client software on Windows machines makes using PPTP very tempting. The best answer to this problem is to utilize two-factor authentication. If a one-time passcode is brute-forced, it won't matter as it can't be used again.

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