Set up a VPN on your Zentyal small business server Zentyal Community Edition small business server is a great and free solution for any company that needs functionality similar to Windows Small Business Server, but does not have the budget for Microsoft's take on the multi-function server. (There are other editions of Zentyal that are not free.) Zentyal Community Edition offers plenty of features to meet your needs, which include: VPN serverFirewall and routing DHCP server DNS server NTP server Email server (including webmail) Certificate Authority Web server Workgroup (including Windows Active Directory syncing) XMPP server I'll walk through the process of setting up a VPN server on your Zentyal Community Edition small business server. The VPN server on Zentyal is an OpenVPN PPTP server, which benefits from: Public key authentication SSL-based encryption Clients available for Windows, Mac, and Linux Allows use of network applications transparently Let's set this VPN server up. Create a Certificate Authority and certificates 1. 2. 3. 1. 2.
Set Up the Ultimate Home Theater This Weekend Small Office/Home Networking Howto, Part 1: Setting up a LAN Setting up a LAN (Local Area Network) by James R. Williams Zavada, March 2002 Table of Contents Disclaimer: This information is provided in the hopes that you will find it useful and instructive. Any and all trademarks mentioned in this text are property of their respective owners. Introduction: The goal of this Howto is to provide the basic information needed to create a small office/home network using ethernet. It is also important to keep in mind that networking, although possible for mere mortals, can be fraught with frustration and problems. Finally, this part of the Howto (Part 1) will only show you how to set up a basic network. Prerequisites: Hardware Requirements In order to set up a network, you will need an ethernet hub, an ethernet adapter for each computer you want to add to the network, and cables. Ethernet Hub As far as hubs go, any brand should work. Adapter Cards You'll need an adapter card for each computer you want to connect to your network. Cables Software Requirements
Hacking your WiFi Card - News Sometimes it’s necessary to modify existing technology. Sometimes it can be done for fun. Computers have a long history of being modified. However, as computers, namely laptops, have gotten more compact, it’s become increasingly harder to perform any sort of modifications or fixes on them without the help of professionals. I recently had such a problem. Luckily for me, I had modded the wireless antenna on a laptop before. The Asus EeePC with an external antenna connection protruding out the side. Using the knowledge I had gained while hacking the EeePC, I decided I would try this fix on my Macbook before buying a new wireless card. As you can see, there was little room inside the laptop for the connector, so the only choice was to have it live on the outside of the laptop. The modded Macbook. Once the Sugru had dried, I put everything back together to make sure the laptop still worked. The final mod has been in place for several months now.
dnschneid/crouton Green Bay Professional Packet Radio Green Bay Professional Packet Radio is our attempt at an advanced wireless communication research team. Based in Green Bay, Wisconsin, we have banded together a small group of specialized residents who strive for the advancement of modern forms of electromagnetic wave communication. We specialize in high-speed wireless data (packet), digital voice transmissions, ELINT/EW/ECM, radar, antenna design, bi-phase modulation and also the hardware/software side of all those types of communication. We are die-hard radio homebrewers and experimenters. While other people are drooling on nothing more than glorified ice cream truck 2-way radios, we are out using new and efficient modulation techniques and pioneering new developments in modern radio. We've also homebrewed microwave radio bi-directional amplifiers for the local packet radio links, circular polarized repeater antennas, high quality audio hardware and all types of RF test equipment. Amateur Radio Projects Other Projects FCC Compliance
How To Recreate The Classic Pong Game Using Arduino Pong was the first ever videogame that reached the mass market. For the first time in history, the concept of a “video game” was brought into the family home, thanks to the Atari 2600 – so it’s only right that we pay a little homage to this historical gem. Now, you can re-live that (admittedly somewhat boring gameplay) using an Arduino and some common components. I won’t lie – it’s unlikely your daughter will be giving up her Nintendo DS, and this isn’t going to provide hours of fun for the whole family – but it is an awesome and easy project to improve your Arduino coding. We’ll make two basic controllers, and the video will output to your TV through a standard composite video cable. Requirements for Arduino Pong 470 ohm resistor x11k ohm resistor x110k ohm Potentiometer (twiddly variable resistor) x2Arduino x1 (any version)RCA plug x1 (if you have more than one, you can hook up sound too. Testing TV Out Take your RCA plug and strip the outer layer away. Test Analogue Potentiometer Inputs
Final Design Project - RFID Proximity Security System Proximity Security System By: Craig Ross (cjr37) and Ricardo Goto (rhg22) Introduction and Motivations: For our final project, we designed and built (and exhaustively tested) an RFID-based proximity security system for use with Cornell Identification cards, which have been RFID-embedded since fall of 2003. The idea for this project was sort of spawned from our general interest in RFID technologies and the near-simultaneous occurance of Lab 2 (Keypad Security System) and the antiquated lock system at our fraternity house breaking. "Old and Busted...New Hotness" -Will Smith At the highest level, our device uses an antenna coil to power the RFID tag embedded in our Cornell ID's and read the induced response from the card. High Level Hardware Design: Before we start with actual circuit design, it is neccessary to understand the principals behind the technology that this project has set out to harness; passive RFID communications. Hardware and Software Tradeoffs: Specific Circuit Elements: