Pierow's Prattle » Wireless Networking

Cracking WPA using Video Cards with CUDA Support

pierow — Thu, 06 Aug 2009 20:16:57 +0000

I-Hacked has an article describing the process for cracking Wi-Fi Protected Access (WPA and WPA2) encryption using the additional processing power of video cards with CUDA support.

[Link]

The Mesh Potato – Mesh Routed VoIP Networking for Developing Communities

pierow — Thu, 19 Mar 2009 15:19:02 +0000

The Mesh Potato project hopes to build an 802.11bg mesh router with a single FXS port. It is designed to provide telephony via VOIP while simultaneously facilitating a mesh cloud. It is an open hardware and open software design. It will run off a nominal 12VDC, from either a mains supply or solar PV system, and be priced in the range of currently available Wifi routers (sub US$100).

The target application is mesh routed VOIP networks, in particular (but not limited to) developing communities. An analog phone connects to the potato via the FXS port. When you make a call you potato talks to the potato down the street which talks to the next potato, and eventually to the destination. The mesh network can be augmented via backbone links and connected to the rest of the world via VOIP gateways.

[More]

1000 mW MINI-PCI 802.11 Adaptor

pierow — Tue, 17 Mar 2009 15:17:00 +0000

Back in July, 2008, Freespace Systems announced the availability of their high performance 802.11 miniPCI radio. The Valemount KXS30SG is the first full 1 Watt miniPCI radio module available worldwide.

The card is Atheros AR5414 based and is supported by a wide number of open-source & commercial operating systems (Including StarOS, Linux MadWifi, MikroTik, & Ikarus. It also comes with both MMCX (micro-miniature coaxial) and Hirose U.FL antenna connectors.

[Pasadena Networks has the cards for $69] [Datasheet for the KXS30SG]

Ubiquiti Networks’ Bullet Outdoor Access Point

pierow — Wed, 11 Mar 2009 11:03:18 +0000

Ubiquiti Networks Bullet

The Ubiquiti Networks Bullet outdoor 802.11 access point is scheduled for release this month has been released. The low-power (100 mW) version is $40 and the 1,000 mW (1 watt) version is $90. (No, that’s not a typo) It’s powered via PoE and connects directly to the antenna so the only connection required is CAT-5. The operating temp is inline with an outdoor application -20C to +70C (-4F to 158F) and it runs AirOS. This could be the Holy Grail for implementing low-cost mesh wireless data networks.

UPDATE: Pasadena Networks has the Ubiquiti Bullet in stock!

[Datasheet] [Resellers] [Bullet Forum]

NEMA Enclosures for Outdoor 802.11 Access Points

pierow — Mon, 09 Mar 2009 13:23:10 +0000

Using NEMA enclosures to house and protect wireless gear in an outdoor environment is nothing new but they tend to look like someone gutted their Linksys WRT54G and crammed the guts into a plastic box.

L-CON has some really elaborate examples showing multiple access points, surge protection, amplifiers, band pass filters, etc all in a neat, logical layout. Impressive!

[HyperLink Brand NEMA Enclosure Configuration Examples]

Creating a Ship to Shore 802.11 Link

pierow — Mon, 09 Mar 2009 07:09:49 +0000

Tony’s Cafe has a really interesting article on using amplifiers along with a combination of omnidirectional and yagi antennas to create a ship-to-shore 802.11 wireless link. Of particular interest is the use of Hyperlink amps and the calculations to compute signal loss due to connectors, cable length, etc.

[Understanding 802.11 2.4GHz Amplifiers and Antennas (and Creating a Ship to Shore Link)]