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The Perfect Server - CentOS 5.5 x86_64

This tutorial shows how to set up a CentOS 5.5 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

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Weekend Project: Secure Instant Messaging with Off The Record

Instant messaging, just like email or VoIP traffic, needs to be secure from eavesdroppers, man-in-the-middle attackers, and other security threats. Many IM clients can tunnel messages over transport layer security (TLS) to provide encryption, including XMPP (a.k.a. Jabber), IRC, and the OSCAR protocol used by AIM. TLS provides authentication and encryption at a low level, but a considerably secure solution for IM is a protocol called Off The Record (OTR). Pull up a chair and secure your instant messaging today.

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How to join a Ubuntu machine to a Windows domain

No matter how you try, sometimes you can't escape the clutches of Microsoft and Windows. You might have a fortress of Linux solitude at home, but unless you are one of the lucky ones working in a Linux-only environment, you are going to have to interact with Windows.

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Microsoft Exchange Alternatives for Linux


Looking for a Linux-friendly groupware suite that can take the place of Microsoft Exchange in your organization? You'll find a wide range of alternatives for Linux that offer most (if not all) of Exchange's functionality.

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Weekend Project: Cache Local DNS Queries

There are few additions to your network that will make as immediate of a performance boost as setting up a caching DNS server. Every computer on the local segment of your network makes hundreds -- if not thousands -- of DNS queries, and if you forward each one of them to a server on the other side of your WAN pipe, you are just throwing away bandwidth. Not only is caching DNS services simple to set up, you even have multiple options for doing so under Linux.

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