Description: Welcome to Part 11 of the WLAN Security Megaprimer! Please start this series by watching Part 1 http://www.securitytube.net/video/1756, if you have not done so already.
In this video, we will understand how to use the Alfa card to navigate channels outside the current regulatory domain and also how to set the power to the factory maximum. We will explore various techniques of how to set the card on arbitrary channels and power (up to maximum allowed by the hardware). This is a must watch for any WiFi penetration tester.
Tags: 802.11 , megaprimer , wireless , security , alfa card , regulatory , iw , iwconfig , txpower , channels , bands ,
Thank you.
Thanks AGAIN & AGAIN & AGAIN & AGAIN ! :D
I'm checking this site each 30 minutes. Can't wait for more interesting videos.
Again - just superb! THANK YOU!! (more, please :)
Thank You Vivek for your nice upload, Please keep it up, Could you please let me know if this card is working with cain on windows,
Do you know for which reason under ubuntu firefox,is quite impossible to view your videos or most of them?
Things are very interesting
Hey Vivek, thank you for the videos.
Just a little note. If you are using the r8187 driver on this card for compatibility reasons (in VmWare and similar) (http://www.backtrack-linux.org/wiki/index.php/Rtl8187_vs_r8187) then you will need to issue the (iwpriv wlan0 highpower 1) command before you can change txpower. (http://www.aircrack-ng.org/doku.php?id=r8187)
Also a few questions. Are there any major benefits or drawbacks to setting your txpower to the legal max? Some forums I looked at report that the card may be damaged if you set it too high whereas others report no damage at all. Is there a setting that is widely accepted to be safe? In my own testing setting the txpower seemed to pull up AP's in airodump faster but I did not notice any more AP's so I couldn't tell if there was a range increase or not.
Thank you and keep up the good work!
More, more, more! We're getting into the good stuff now. Even though I'm already using these tools, I am still learning new stuff and your teaching style helps me remember and visualize the nuances I may have forgotten. That will be a big help when we get to the stuff I have always had trouble with like encryption.
V1R3 said "Are there any major ...drawbacks to setting your txpower to the legal max?"
Yes. I work for a WISP and we have a saying "Talking louder doesn't improve your hearing". There are several reasons why we would lower the output of an AP (or client). Speed, near/far, hidden node come to mind.
Vivek, I've been following along on my new toy, an Asus EEE w/ BT4. My droid incredible phone doesn't advertise it's PNL.
Honestly was had no idea what the power means before this video thank you very very very very much :XD
keep Going
@V1R3 If I'm correct txpower is the power your card is transmitting so it doesn't matter for viewing more AP's because you're receiving data.
Again another good work from Vivek. Also we can see your hard work behind these video. Keep it up.
Thanks Vivek. Im learning a lot with the videos. I cant wait to see the next ones!
OMG wow. Nice video just a week too late. I got my 1W rtl8187 chipset wifi card last week and spend hours working out how to get it to 1W. (I use arch linux).
I ended up making my own country on that db file then following some tutorials (for ubuntu made thing more complex) and using my knowledge wrote custom package builds for crda and wireless-regdb to get everything working. I think I ended up using the most complex method to unlock the full 1W of my card but I guess I learn't alot during the process.
@Kamel, m0e1, QuarterCask, ahmadqdemat, Jijo.Emmanual, luizfs Thanks a ton guys! Appreciate your kind words.
@Acebond Awesome! Would be really great if you can make a video of the entire process and post it here. I am sure it would be a good learn for everyone. Let me know.
@VIR3, Unai Transmit power does not adversely affect receiver sensitivity. Receiver sensitivity can be boosted by a good antenna and a signal booster after that before the signal reaches your machine. Lots of home brew projects and commercial ones are available on the Internet.
@WCNA Awesome! I am glad there is something to supplement other courses. If your phone does not advertise the PNL, then it might not be able to discover non-broadcast networks (hidden SSID ones). Windows 7 or Vista had similar issues which they documented :)
@zidane I am not using windows anymore, but will try to see if this can be covered. The major hurdle is getting the right drivers for windows which will allow for injection / monitoring.
@hazz It should work. The videos are embedded from vimeo. Just try upgrading your flash player.
Everybody was kung-fu fighting ... de de de de da, da da da, da da....
Fantastic Vivek, thank you so much for clearly answering a question so well. What I love about your videos is you plant a seed and the tree of though grows from it :-)
DISCLAIMER:
Probably best to mention running the Alpha at 1 watt with no antenna might fry the final RF stage of it ? Also home brew antennas ( a fascinating subject in itself ) may do the same if the VSWR is bad.
Woop Woop, give that Alpha card some Kung Fu!
Thank you so much Vivek :)
@Vivek-Ramachandran Sure man. I'll get started now.
I'm always watching MITM videos and most of the time IPtables are used, to forward the victim's traffic out to the internet, through the hacker's machine.
But in this video, I learned a different way to accomplish that, that I haven't seen before.
I hope to see more great videos coming, as always they are very informative, educational and moreover they just make my interest not only in wireless security but in general computer security outgrow.
Keep it up....
@zidanem, as Vivek-Ramachandran mentioned, its a major huddle to get packet injecting/monitoring to work under Windows. I've seen lots of people in other forums experiencing issues, not that it can't be done, which it can but you will have to play around with the drivers, until you find the right that works with Windows.
Which is why a lot of people would recommend BackTrack instead. Plus some MITM attacks works better in Linux than Windows.
yay! i love this topic. so glad someone is finally going in depth on a wireless topic. thanks a ton
Good one this, beats reading a ton of scattered wikis; thanks.
WOW! You just renewed my interest in Wifi Security. Time to break out those old Wifi cards
Excellent video! My favorite of the Wireless series thus far! Great work, Vivek!! (and I love that you're taking the time to go deep into the subject and not just scratch the surface as many others do...)
Vivek -Why so serious? :P just teasing
Thanks to everybody's comments and sharing knowledge and special thanks to Vivek :)
I just had to pause and comment at 7:19...i agree with you about going indepth, and in fact is the reason why i love to watch your primers and videos over anyone else. please ALWAYS keep the same depth in all your videos! (maybe even more depth if your up for it :P) cant wait to see what else you put out!
You are officially the MegaPrimer god!!! You have no idea how much I appreciate all your work. Thank you, Thank you, Thank you!!!
Another great one. I had been wondering about this topic whenever I would see that my alfa card was default at 20, which is only 3 higher than the built in card on my laptop. Unfortunately I didn't even understand the question well enough to create any fruitful google searches. This cleared up that question for me. Thanks again!
Thanks for the great video! Wonderful detail and demos!
I wish this could be done in Windows.. :/ Can it?
My notes on this part are here: http://41j.com/blog/2011/10/securitytube-wireless-lan-security-megaprimer-notes-part-11-alfa-card-kung-fu/
Thank you very much for sharing. This the first of your video's I've watched and Im thrilled to watch more
Hey everyone, I was wondering if someone could help me out. I just purchased a new alfa card running bt5 r1 on vm, my country state won't stay at CA when i set the iw reg set everytime i restart it goes back to 00. ther for my txpower goes back to 20. when i want it at txpower 27 as my country's limit is 27.
anyone have a idea why this happens
Many thanks for an outstanding and well put video Tutorial.
I have to say all of your videos are very easy to follow and also enough to learn the basics so that you can put what the tutorials have show into practice.
Keep up the great work
I just discovered your videos and registered on your site. Your videos are very nice to watch(understandable for a noob like me) and up to date(most on the internet are not). Keep up the great work
Greetz Nevs
Thoroughness that's something very hard to find in a teacher... Thank you Maestro!
Excellent video. I really enjoyed the depth and explanation. I may not always be able to keep up on some of the videos but its worth having that extra information.
Thanks a lot great video
Vivek! You are wonderful! Please keep up the work!
I really appreciate how you explain everything. I am taking notes just like a class I paid for. I will take this exam after I watch this series a few times ha ha
Hi.
I have tried this with the Alfa AWUS036NHA. Even though I can change set region to BO, i still get error message when trying to change txpower.
your so right about going in depth on a topic. it makes it so much clearer when you know how and why something is happening
Thank you for this video Vivek. Can't wait to finish my CS studies so I can get some ST certifications :D
Vivek these videos are awesome. I really enjoy your courses and I'm glad that there is a cert exam I can take later to back it up. Keep it up Vivek!