80211

sdfsdfsdfsdf Visit https://www.securityweekly.com/psw for all the latest episodes! Show Notes: https://securityweekly.com/psw905

Working from home can certainly emphasize the importance of a strong wi-fi network. In the first deep-dive into the world of home internet, the Brothers discuss the basics that you need to know in order to create and get the most out of a wireless network, including: Specs Router types Standards (802.what??) Signal types Features Brothers’ Advice: Enable your “Guest” network at home so that when your brother comes over, you can give him really slow internet! In addition, the “BiTS” (Brothers in Tech Suggestions): Brian’s Pick = WiFi Explorer (https://www.adriangranados.com): Application that will provide you with lots of information about the strength of not only your wireless network…but any network that it can see. Helpful when determining effective router or working location. Alan’s Pick = FING (https://www.fing.com/products/fing-app): mobile app that will show you a list of all connected device on your network, provide network alerts & speed tests. Have any feedback for the Brothers regarding this topic (or future topics)? Email info@themesh.tv. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

The guys tackle another chunk of the 1st section of the CWNA objectives (1.4, for those checking).

When they've gotten through that fun, they take some time to discuss WFH arrangements, especially relevant at the time of recording due to the then-current lockdowns all around the world.

In our second episode, hosts Landon and John dive into the first portion of objectives from CWNA-107, and discuss how these concepts matter to a WiFi engineer.

In the free form portion of the 'cast, the pair discuss some of how they came to be in the world of WiFi

It's time to introduce everyone to Spatial Streams, a podcast driven by WiFi but certainly not limited to all things 802.11,

In this first episode, our hosts Landon and John introduce themselves and dive into a variety of topics, including some WiFi basics and some new certifications.

In This Episode: - Keith sits down with Cees Links of Qorvo.com. They reflect on Cees' pioneering work in Wi-Fi and talk about where things are headed with Wi-Fi 6. - Ben Miller shares his thoughts on how to use channel utilization in Wi-Fi from his presentation at WLPC Phoenix 2019

In this episode we discuss the WGM160P Wi-Fi Module with Nick Dutton, Wi-Fi Product Lead at Silicon Labs. Nick answers the following questions to help engineers understand the benefit of designing with the WGM160P.

• What is the WGM160P?
• What are similar devices that customers may compare against the WGM160P?
• What features will Engineers value in the WGM160P?
• What applications are ideal for the WGM160P?
• How does a customer get started evaluating the WGM160P?

Episode 2 includes a discussion of the similarities between 802.11ax & LTE, how LTE-U is competing for the same spectrum space as WiFi, and how 802.11ah could benefit us by freeing up much needed spectrum.

For show notes visit: https://contentionwindow.com/show-notes

Music courtesy of https://www.musicscreen.org/Royalty-free/Music/Electronika.php

In This Episode: - Devin Barger shares his own "Wi-Fi story" and explains why being able to communicate WLAN principles to different "audiences" is so valuable for WLAN Professionals. - Keith reviews one of his most used charts from the WLAN Professionals Notebook - The 802.11ac -VHT MCS, SNR, RSSI chart

In This Episode: Keith catches up with David Westcott and David Coleman to find out what's new in the 5th edition of the Sybex CWNA Study Guide Keith also highlights the 802.11 Wireshark Filters from the Wireless LAN Professionals Notebook

Wofür steht WLAN, was bedeuten die unterschiedlichen Standards und Frequenzen, wieso ein WLAN-Key bzw. Sicherheitsschlüssel, die Vorteile und Nachteile von WLAN sowie Empfehlungen zur Nutzung von WLAN. 

Weitere Tipps und Informationen sowie eine Buchempfehlung zum Aufbau eines eigenen professionellen WLANs gibt es auf unserer Website www.innovativeit.de/8005

 

German graduate students Erik Tews and Martin Beck have discovered an exploitable hole in WPA, a popular wireless encryption protocol. This week, Tews will present a paper on the topic at the PacSec conference in Tokyo. In this podcast Mike Qaissaunee and I discuss wireless network security and this newly discovered WPA hole.

Here's a list of questions asked during the podcast:

Where is the information for this podcast coming from?

Why is this important?

So, we've now got a security issue with WPA encryption! Before we get to WPA - can you give us a little background on wireless encryption?

So, the first attempt was WEP. Most devices still support it - why should we not use it?

So, that's not good. What did the IEEE do?

What else did the 802.11i group do - what was the second solution?

So, let me make sure I understand. Older wireless devices can be updated to support WPA which includes TKIP. Now, I've heard of WPA2 - what is that?

So, the new products support both but old products only support WPA. I think I've got it! What did Tews and Beck actually crack?

So the problem is with old devices that only support WPA and TKIP and not WPA and AES?

What is the problem with TKIP?

Now, didn't WEP use checksums this way?

The ars technica piece mentioned short packets are ideal - especially ARP broadcasts. Why?

Let me see if I understand, an attacker sniffs a packet, makes minor modifications to affect the checksum, and checks the results by sending the packet back to the access point.

So it is not something we should be worried about?

What can we do to protect our networks?

Can you describe rekeying?

Now, I've heard of this - you need to be careful. You don't want to enable rapid rekeying unless ALL of your clients support IEEE 802.1x and an authentication method (e.g. EAP-TLS) that supports key distribution.

So, let's get to the point here - WPA really is not broken?

Listen to get the answers!

Located just south of Vancouver, Delta School District includes 33 schools spread out over 60 miles. Having initially deployed consumer-grade Wi-Fi technology, Delta quickly realized that it needed industrial strength management and WLAN performance to meet the needs of educators, students and administrators. Its first enterprise WLAN provider offered central management improvements, but Delta was only able to sprinkle single access points (APs) in most of its schools, equipping some with several APs and a centralized controller. Adding more APs meant adding more controllers and backhauling traffic from each AP to a central site over a WAN connection. Then Delta switched to Ruckus Wireless and gained a professional-grade WLAN system that could be centrally managed, was quick to deploy and offered unique design attributes thanks to meshing. Paul Parsons of the Electronic and Computer Services (ECS) Group within Delta School District is my guest as we talk about Delta’s business requirements, motivation and experience with a new WLAN solution by Ruckus Wireless.

Intro
The IEEE 802.11 Working Group on January 19 unanimously approved a new Draft 2.0 802.11n proposed standard. In this podcast we take a look at this new draft standard and also look at earlier standards including 802.11 a, b and g.

Question: Mike – before we get into the technology….. this new draft standard was approved unanimously by a 100 yes, 0 no, 5 abstaining vote, but it is still not a standard yet. What is the rest of the process to get this to be a standard?

The IEEE 802 Plenary committee meeting will be held March 19th in Orlando, Florida and between now and then the IEEE will collect votes and comments with two questions asked.

The first question that will be asked by letter ballot over a 15 day period is "Should 802.11n Draft 1.10 be forwarded to Working Group letter ballot as Draft 2.0?" If this question passes by 75% or more then a second question will be asked by letter ballot "Should 802.11n Draft 2.0 be forwarded to Sponsor Ballot?"

If both of these pass by 75% or more then on the IEEE will start moving the Draft 2.0 towards a standard. It looks like they will move this standard along much more rapidly with approval before the final approval date of October 2008 on the current IEEE timeline found on their website.

Since late 1990s, IEEE has approved four standards for wireless LANs:
•    IEEE 802.11
•    IEEE 802.11b
•    IEEE 802.11a
•    IEEE 802.11g
IEEE 802.11n expected to be approved by 2008

IEEE 802.11

Specified that wireless transmission could take place via infrared (IR) or radio signals
•    Infrared Transmissions:
–    Can send data by the intensity of the infrared light wave
–    Light spectrum: All types of light
–    Infrared light: Can be used for wireless transmissions
–    Emitter: Device that transmits a signal
–    Detector: Device that receives a signal
–    Advantages:
•    Does not interfere with other communications signals
•    Not affected by other signals
•    Does not penetrate walls
–    Disadvantages:
•    Lack of mobility
•    Limited range
•    Confined to indoor use
•    Slow transmission speed
•    Radio Wave Transmissions:
–    Radio waves can penetrate through objects
•    Provides mobility
–    Radio waves travel longer distances
–    Can be used indoors and outdoors
–    Radio waves can travel at much higher speeds than infrared transmissions
–    IEEE 802.11 standard outlining radio wave transmissions has become preferred method for wireless LANs

Question: Can you tell us about the different standards over time? Can you start out with 802.11a?

Release Date Op. Frequency Data Rate (Typ) Data Rate (Max) Range (Indoor) October 1999         5 GHz         25 Mbit/s     54 Mbit/s     ~30 meters

IEEE 802.11a
•    IEEE 802.11a standard specifies maximum rated speed of 54 Mbps
–    Also supports 48, 36, 24, 18, 12, 9,and 6 Mbps transmissions using U-NII band
•    802.11a and 802.11b published at same time
–    802.11a came to market later due to technical issues and high production cost
•    Range of 802.11a is less than that of 802.11b

How about 802.11b?

Release Date Op. Frequency Data Rate (Typ) Data Rate (Max) Range (Indoor) October 1999     2.4 GHz 6.5 Mbit/s 11 Mbit/s ~30 meters (~98 ft)

IEEE 802.11b
•    802.11 standard’s 2 Mbps bandwidth not sufficient for most network applications
•    802.11b amendment added two higher speeds (5.5 Mbps and 11 Mbps) to original 802.11 standard
–    Uses ISM band
•    Supports wireless devices up to 115 meters (375 feet) apart
–    Radio waves decrease in power over distance
–    802.11b standard specifies that, when devices out of range to transmit at 11 Mbps, devices drop transmission speed to 5.5 Mbps

And g?

Release Date Op. Frequency Data Rate (Typ) Data Rate (Max) Range (Indoor) June 2003 2.4 GHz 24 Mbit/s 54 Mbit/s ~30 meters (~98 ft)
IEEE 802.11g
•    Effort to combine best features of 802.11a and 802.11b
–    Data transfer rates to 54 Mbps
–    Support devices up to 115 meters apart
•    802.11g standard specifies that devices operate entirely in ISM frequency

Now, how about some detail on n?

Release Date Op. Frequency Data Rate (Typ) Data Rate (Max) Range (Indoor) January 2007 2.4 GHz or 5 GHz 200 Mbit/s 540 Mbit/s ~50 meters (~165 ft)

Projected IEEE 802.11n
•    Currently in evaluation stage
•    Top speed of 802.11n standard will be anywhere from 100 Mbps to 500 Mbps
•    Ratification may not occur until 2008
–    Devices based on standard may appear prior to that
•    802.11 pre-N

According to TG Daily and posted at Netstumbler.com Intel will announce the release of a new 802.11n WiFi chipset code-named Kedron on today, 1/30/07. According to Netstumbler.com:

The firm originally planned to launch the product along with its new mobile chipset code-named Santa Rosa in the second quarter of 2008. The Kedron 802.11 n draft-capable version will be named "WiFi Link 4965 AGN" while the non-draft n capable variant will go by the name "WiFi Link 4965 AG".

802.11, with its high theoretical data rates of up to 540 Mbit/s, has been bouncing around without a standard since first proposed by the IEEE in 2004. The lack of a standard has not stopped the manufacturers with the first pre-standard or “pre-n? routers made available to consumers in April 2006. I am sure you have seen these products from most of the big manufacturers including D-link, Netgear and Buffalo for sale in the Sunday papers and many of you may have actually purchased pre-n devices.

It looks like we may be getting a little closer to a standard now. On January 19 the IEEE 802.11 Working Group unanimously approved a request by the 802.11n Task Group to issue a new Draft 2.0 of the proposed standard.

With the Apple TV product announcement at Mac World it may be more than just a coincidence that we are seeing movement now. According to Netstumbler.com, AppleInsider and MacFixIt are reporting Apple will charge $1.99 per machine to enable the draft 802.11 standard on:
…. any Mac running Core 2 Duo or Xeon processors, with the exception of the entry-level 17-inch 1.83GHz iMac. These machines have had 802.11n technology built in, but not switched on.

If you do go out and purchase a new $179 Apple AirPort Extreme Base Station, you will not have to pay the $1.99 per Apple machine for the upgrade. It is important for Apple to move quickly here because the Apple TV product shipping in February depends on the higher 802.11 bandwidth for video and audio streaming. The Apple TV box connects to your ED or HD television and content is streamed from a Mac or PC running iTunes. You can get more information on the Apple TV box here: http://store.apple.com

It is important to realize these are local area network bandwidths – this means transfers machine to machine inside your home or business network will be very fast but you will still be limited by your broadband provider bandwidth when accessing the Internet.

References:
Wikipedia.org
Intel To Launch 802.11n Wi-Fi Chipset Next Week: http://www.netstumbler.com/2007/01/25/report-apple-will-charge-for-802.11n-access/
802.11n Devices Are Fully Compatible With .11b/g: http://www.netstumbler.com/2007/01/25/report-apple-will-charge-for-802.11n-access/
Report: Apple Will Charge For 802.11n Access: http://www.netstumbler.com/2007/01/25/report-apple-will-charge-for-802.11n-access/