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Blog of David Davis - Topics: Cisco, CCIE, CCNA, CCNP, Security, Wireless, and anything else related to IT

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Welcome

by ddavis In reply to Blog of David Davis - Top ...

<p><strong>Welcome to the first entry in my Blog on July 15, 2005.</strong></p>
<p><strong>I will try to create a blog entry each weekday. I have a lot of IT certifications so I will spend a fair amount of time covering certifications. </strong></p>
<p><strong>Speaking of certifications- has anyone gotten or is anyone interested in the CWNA (cerified Wireless Network Admin) certification? I am currently authoring a video series on CWNA (and wireless in general) for <a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?B=9&A=11&Task=Click">TrainSignal</a>. They have some awesome videos on all types Microsoft products (MCSE, Exchange, VPN, etc). They are coming out with a CCNA product and my wireless video soon. <a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?B=9&A=11&Task=Click">Checkout their site!</a></strong></p>

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Welcome to the Blog of David Davis!

by ddavis In reply to Blog of David Davis - Top ...

<p><strong>Welcome to the first entry in my Blog on July 15, 2005.</strong></p>
<p><strong>I will try to create a blog entry each weekday. I have a lot of IT certifications so I will spend a fair amount of time covering certifications. </strong></p>
<p><strong>Speaking of certifications- has anyone gotten or is anyone interested in the CWNA (cerified Wireless Network Admin) certification? I am currently authoring a video series on CWNA (and wireless in general) for <a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?A=11&Task=Click">TrainSignal.</a> They have some awesome videos on all types Microsoft products (MCSE, Exchange, VPN, etc). They are coming out with a CCNA product </strong></p>

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802.1x and IAS

by ddavis In reply to Blog of David Davis - Top ...

<p>Has anyone tried to configure 802.1x and RADIUS authentication for a wireless network?</p>
<p>I hate to be one of those people who complain about technology but configuring 802.1x and RADIUS is a real pain.</p>
<p>I am at the point where the Windows client prompts for a username/password when trying to connect to the wireless network. However, the RADIUS server and the wireless AP are just not communicating. Even worse, the log for the RADIUS server is always empty, despite the fact that I turned on logging for all levels.</p>
<p>Anyway, so goes technology....</p>
<p>Have a great Saturday and checkout <a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?A=11&Task=Click">TrainSignal's videos</a> - they are the best I have seen!</p>
<p>- David</p>

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802.1x and IAS

by Gary8359 In reply to 802.1x and IAS

<p>I apologise if I am stating the obvious here but I spent several months on and off getting a radius system working.</p>
<p>1. Are you certain your pre-shared secret in the wap radius settings and IAS radius client settings are the same?</p>
<p>2. What client-vendor settings are you using. Radius standard is the best starting point.</p>
<p>3. I am using "PEAP and passwords" from the Microsoft document on their website which "generally" works well. </p>
<p><a href="http://www.microsoft.com/technet/security/topics/cryptographyetc/peap_0.mspx">http://www.microsoft.com/technet/security/topics/cryptographyetc/peap_0.mspx</a></p>
<p>But!! </p>
<p>I have had problems with wireless access points. Which type are you using? </p>
<p>I found that a 3com access point I tried would not communicate properly with the radius server. It would authenticate the user but not the computer. I have found that linksys and d-link access points do work but it depends on firmware. Not always the latest firmware either! I have had to backdate D-Link firmware to get it to work properly.</p>
<p>4. What does your event logs on the IAS server and on your "client" say about the connection. Have you turned on full logging in the IAS server?</p>

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Happy Birthday!

by ddavis In reply to Blog of David Davis - Top ...

<p>Today is my Birthday! Hoorah! </p>
<p>Anyway, let's talk about t-mobile hotspots.</p>
<p>Does anyone know if there is anything to keep someone from getting a single unlimited tmobile hotspot login and sharing that username/password among many people? I was at Borders this weekend and was looking at the brochure for their services and had that thought. </p>
<p>Wireless is so insecure... That reminds me of the pain I am having with 802.1x authentication while working on my wireless training video for <a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?A=11&Task=Click">TrainSignal.</a> (Did I mention that you should checkout their <a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?A=11&Task=Click">MCSE videos</a>?)</p>
<p>Happy Birthday to me. Happy Birthday to me... I'll let you all know how the cake was tomorrow.</p>

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Qcheck Performance testing

by ddavis In reply to Blog of David Davis - Top ...

<p>To test network (wired or wireless) throughput, I found a handy utility called qcheck. You run it on a server and client and it does transfers between them. It can do multiple types and for different purposes (VoIP testing, or whatever). It is pretty cool. I am using it to test wireless network performance. It is pretty sad that the WLAN says "connected at 54Mbps" but the transfers only yield 5Mbps. It is FREE, here is the <a href="http://www.ixiacom.com/products/qcheck/">download link</a>, and here is <a href="http://www.ixiacom.com/products/performance_applications/pa_display.php?skey=pa_q_check">how it works differently from ping</a>.</p>
<p>Also- checkout <a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?A=11&Task=Click">MCSE videos</a> from TrainSignal.</p>
<p>Have a great day- David </p>

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Qcheck Performance testing

by zlq4 In reply to Qcheck Performance testin ...

<p>Hi David,</p>
<p>It is really cool utility... I am checking your MCSE videos from TrainSignal... just don't see the CWNA video...</p>
<p>Many Thanks ;-)</p>
<p>Best Regards,</p>
<p>Arthur Phan</p>
<p> </p>

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Qcheck Performance testing

by ender In reply to Qcheck Performance testin ...

I prefer <a href="http://dast.nlanr.net/Projects/Iperf/">iperf</a>.<br />

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Qcheck Performance testing

by ddavis In reply to Qcheck Performance testin ...

<p>Thanks to both the members who posted. </p>
<p>To find my CWNA videos, now released, go to <a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?A=11&Task=Click">Train Signal</a> and click on CWNA Video Series or Fast Track Lab 20. Anyone who is new to wireless will learn a lot and even admin's who have wireless experience will be impressed. </p>
<p>I will have to check out iperf. Thanks for that tip!</p>
<p>And thanks for reading TechRepublic!</p>
<p>David</p>

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Wireless hacking

by ddavis In reply to Blog of David Davis - Top ...

<p>Today, let's talk about Wireless hacking. I just finished a video series for <strong><a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?A=11&Task=Click">Train Signal.com</a></strong> on wireless networking. As part of that series, I did a video on wireless hacking. I demonstrated in this video how to hack WEP encryption. It took all of 5 minutes to produce the key using a brute force attack. Disabling SSID broadcast and MAC address filtering make no different. Adding 128-bit or greater WEP encryption really doesn't change anything either. In the video, I also did a dictionary attack on WPA. I was able to crack the dictionary word password in about 5 minutes too. WPA (as it usually uses TKIP, like WEP) has the same vulnerability. Now, WPA2 and AES are a different story. I recommened everyone use WPA2 / 802.11i.</p>
<p>This video series will be out around the end of this month on <strong><a href="http://www.trainsignal.com/AffiliateWiz/aw.aspx?A=11&Task=Click">Train Signal.com.</a></strong></p>
<p>For any wireless hacking questions you have, feel free to post them on this blog and I will do my best to answer.</p>
<p>David</p>
<p> </p>

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