A partly overloaded DNS server can slow down all the workstations on the network. Dnsgraph is an early warning system that gives administrators a graph of critical values. Your Dnsgraph charts will help you keep your systems serving names.

Filesharing is a favorite leisure activity for many Internet users. But conventional filesharing tools have one major drawback – they aren’t anonymous. The Antsp2p project aims to change this.

Many tools keep growing with each new version, but Nmap 4.00 has lost weight thanks to the Diet-Nmap project. The latest incarnation of Nmap is not only quicker, it is also more frugal with memory.

Webalizer is a tool for analyzing web server logfiles. A new patch lets admins see what isn’t there.

The Twisted framework makes it so easy to create network-aware applications in Python. Twisted speaks all the major Internet protocols, from mail through chat, and it can handle encryption. We’ll show you how to set up a personal web server with Twisted.

An old computer is all you need to build your own do-it-yourself personal phone server.

When you want to call your friends in distant countries, don’t pick up the phone; just put on your headset and fire up Linphone.

Internet telephony does not need to be complicated. You can talk to the world with just Kphone, a normal sound card, and an account with an Internet phone provider.