William J. Francis calls upon his fellow Android developers to keep user data safe. Follow his tutorial on how to add AES level encryption to your Android apps.

If your business needs to extend its wireless range but doesn't have the budget for a complex setup, Jack Wallen has the solution for you.

Scott Reeves shares the wireshark filters that helps you isolate TCP and UDP traffic.

Erik Eckel details the steps to configuring VPN connectivity and connecting via a configuration profile or by manually entering VPN settings in Mac Lion Server.

If your phone gets lost or stolen -- or if you decide to return or recycle it -- you need to wipe it clean of your private data.

Scott Reeves demonstrates the use of iperf, which provides basic information on throughput, packet loss, and jitter to help you troubleshoot UDP and TCP issues.

Improperly installed cabling can cripple network performance, create maintenance headaches, and lead to hidden costs. Here's where things can go wrong.

If you support so many network nodes that multiple switches are required, technology consultant Erik Eckel encourages you to do it right.

Scott Lowe drills down on the network-related metrics you can see in the Microsoft Windows Resource Monitor tool.

After introducing and recommending SELinux a couple of weeks ago, I followed up with some of the basics – learning about setting file contexts with the semanage tool. This time, I’ll show you how to set other contexts, and also look at how to handle reported access violations. Previously, we concentrated on file contexts; yet ...

Jack Wallen shows you how to clear the Address Resolution Protocol cache and how to manage that cache with a few command switches.

Vincent Danen tells you how the D-Link DNS-323 NAS box can be hacked with a set of scripts to become a full-fledged Linux server. See the options that are available for you to customize on this very affordable device.

The Android platform has an outstanding built-in VPN connection tool. Jack Wallen describes how Android users can set up and connect to a VPN with the help of a PPTP VPN.

Rick Vanover recently profiled two disk-wiping solutions and detailed how they work with a series of screenshots. Which tools would you like to know more about?

Although IPv6 adoption seems to be moving at a snail's pace, there's no outrunning it. Brien Posey demystifies some of the addressing issues many admins are still trying to figure out.