Building a free voice over IP phone system was never easier. Matt shows us how to setup a 3CX PBX in under 10 minutes. Ever wanted to program a development board? Darren�s gets started with a USB based kit for under 20 bucks. And Ron Gula, CEO and CTO of Tenable Network Security joins us to talk about Nessus, PVS and more.

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Show Notes

Get started programming a USB development board for under $20

Programming a development board can be very exciting but it doesn’t have to be complicated or expensive. Especially when you have the Arduino integrated development environment and community as a resource.

In this segemnt I get started programming the Teensy USB Development board. This inexpensive board ($19 USD) from PJRC comes with cross platform software that makes it simple to load programs, read debug code and even integrate with the Arduino IDE.

In my segment I demo compiling under linux, the software loader, and integrating with the Arduino IDE. I plan to use this board for future projects including the HakHouse Rover. If you have ideas for other projects be sure to let me know!

Darren Kitchen

3CX – An IP-PBX for Windows in under 10 minutes

Recently on Hak5 I showed how easy it was to setup a Windows based IP-PBX using software by 3CX, a company out of the small country of Cypress.

After having an urgent need to replace our aging PSTN based telephone system which costs $100/hr for some monkey to come in and make a simple extension change, my company decided it was time for something we could control.

I had been through this motion about a year prior, and in that time, came away with a solution from Mitel which ended up costing around $30,000. Now this was a great platform, (IP3300 if I remember correctly) Office Communications Server 2007 integration, remote site support, Exchange 2007 UM integration, all of the key features that I had spent tireless hours implementing in our infrastructure to hopefully take advantage of in a new phone system.

However, the current economic conditions as they are, we could no longer justify a $30,000 price tag for a new phone system; Enter 3CX.

After searching google for about a half hour, and looking at all of the asterisk based IP-PBX systems, I came across the 3CX IP-PBX platform which ran on top of Windows. Now I know there are those of you out there that may be reading this thinking to yourselves, AHHH MORE WINDOWS. Well you can go to hell, seriously. My company is a Microsoft shop, end of story. I have no need, nor the time to do something in linux that would take me personally longer than it would in Windows. You may be quicker, and that�s good for you, but I can�t be bothered. Windows works for my company, and that�s all that you need to know.

Back on track� After downloading the free version (yes it�s completely free if you don�t need some of the advanced features such as Exchange 2007 UM integration, or call parking, etc.) I literally had a functioning internal phone system up and running in about 10 minutes. The installation is painless, and the configuration steps a breeze.

So I decided to kick it up a notch. I ordered a single Linksys SPA962 IP Phone from 888voipstore (I highly recommend these guys, sure you can find stuff for 10-15 bucks cheaper, but at the end of the day, I�m speaking to someone I understand, and who is very attentive to their customer) After receiving said phone, I plugged in the mac address to the 3CX back end, and auto provisioned the phone. CAKE! Nice and moist, just the way I like it.

Next came the all important decision of how many people we�re going to roll this out to in Phase 1. Answer? 16

I can handle 16, and apparently so can 3CX. I had 16 extensions and phones configured in about 2 hours. That includes the time it takes to upgrade the phones to the latest 6.1.5a firmware available from Cisco.

All in all I�m pretty satisfied with the 3CX package. While I can�t get into every nitty gritty detail of my phone system, I don�t need to. The software works, a few small issues not withstanding) and I can eventually turn over basic user maintenance to someone who isn�t an IT person because it really is that easy to use.

I really would suggest anyone with a Windows machine lying around the house who has a need for a basic PBX for use with either a VOIP provider, or a PSTN gateway look at 3CX. I know I�ll be deploying a server here at the hakhouse for some other business purposes, and don�t have to worry about much beyond which machine I�m actually going to throw it on.

For more info on 3CX or to download the free version OR their enterprise version with a free demo license which unlocks all of the software�s functionality, but limit�s it to 2 concurrent calls should visit

Matt Lestock

In this episode we had the pleasure of having Ron Gula, CEO and CTO of Tenable Network Security on the show to talk about Nessus

Thanks to those who’ve contributed to the success of Hak5. Your donations are greatly appreciated!

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  • hi great Episode 503

  • full hakhouse…great episode. you guys are insane.

  • i live in CANADA/MONTREAL, if i install 3CX can i call someone in my city.. ?

    and do you know

  • Okami 6 years ago

    For me this is the best episode of the new crew , keep the good work o/

  • We all have Nokia phones with VoIP software provisioning at my office. Does 3CX support such phones??

  • great site :)

  • Hey guys. Thanks for another fun filled episode. I love that you’re diving into VOIP. The step by step instructions and detailed menus of both devices is great.

    I recently moved my biz over to a voip solution and went through weeks of crap because certain parameters of my grandstream handset were set wrong and not optimized for my network. Pain in the butt.

    Loving the show, loving VOIP. How about some segments on hacking an asterisk box? :)

  • why not try miniSipServer? It is also a great sip server for windows platform and I setup a simple VOIP network in almost 5 minutes. :)

  • Phillip Cooper 6 years ago

    Hi i liked the section on the IP PBX stuff with 3CX, however i would like to point out and mention AskoziaPBX @ , i use this on a neoware thin client with a Disk-On-Module (256MB) and have it connected to my works PBX (NEC Aspire) and have an analog FXS line going in to the box with my land line and have a Cisco 7940 IP phone connected to the system to make and recive calls.

    i think 3CX is good however i love Astrisk, Trixbox, and LOVE AskoziaPBX.

    Well just thought i would mention it …

    Phil :)

  • Stuff on the Teensy microcontroller platform was awesome. We want more! How about some evil USB PC hacks we can do with this device…

  • Please let us know how to configure 3CX in lunix system
    Thank you-feel

  • Cameron 5 years ago

    Darren, looks like you can have your analog inputs that you talked about with the teensy++ which is just a few dollars more.

  • atactic 5 years ago

    Now that I’ve discovered Hak5, I’m working thorugh past episodes…

    In response to DarkJoker’s question on how to share media:
    I suggest that he check out Orb ( It was useful back in verison 1.2, and I’m sure gotten better. Of course a show on this would be great. Maybe this is a good candidate for virtualization? Pair this server with the DynDNS service built into most Linksys broadband routers, and you have a way to get at your media from anywhere.
    In the past I’ve used it to watch the Tour De France live while at work in North America.

    I suggest a competition – Matt builds it, and Darren tries to hack into it….

  • Is the teensy powerful enough to drive the remote control for the rover? or do you need some sort of relay to amp up the strength.