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faq [2010/02/19 16:03] – updated frequency of each channel darkaudaxfaq [2018/02/25 02:26] – Added some useful FAQ entries from Wireshark mister_x
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 ====== FAQ ====== ====== FAQ ======
 +===== What version of Aircrack-ng am I running ?  =====
 +
 +Run 'aircrack-ng | head'. Version information is in the first line of text (second if the empty line is taken into account).
 +
 ===== What is the best wireless card to buy ?  ===== ===== What is the best wireless card to buy ?  =====
  
-Which card to purchase is a hard question to answer.  Each person's criteria is somewhat different.  However, having said that, if money is not a constraint then the following cards are considered the best in class:+Which card to purchase is a hard question to answer.  Each person's criteria is somewhat different, such as one may require 802.11n capability, or may require it to work via virtualization.  However, having said that, if money is not a constraint then the following cards are considered the best in class:
  
-  * Alfa AWUS036H +  * Alfa AWUS036H [b/g USB] 
-  * Ubiquiti SRC+  * Ubiquiti SRC [a/b/g Cardbus] 
 +  * Ubiquiti SRX [a/b/g ExpressCard] 
 +  * Airpcap series [USB] 
 +  * TP-Link TL-WN722N v1 [b/g/n USB] - Beware, if version is not specified by vendor, it is **NOT** v1 
 +  * Alfa AWUS036NHA [b/g/n USB] 
 +  * Alfa AWUS051NH v2 [a/b/g/n USB] 
 +  * MiniPCIe: anything that uses [[https://wikidevi.com/wiki/Ath9k|ath9k]], especially AR92xx and AR93xx (ability to do [[https://wireless.wiki.kernel.org/en/users/drivers/ath9k/spectral_scan|spectral scan]])
  
-If money is a constraint then consider purchasing a card with a RTL8187L, RT73 or Atheros chipset.  There are many available on the market for fairly low prices.  You are simply trading off distance, sensitivity and performance for cost.+If money is a constraint then consider purchasing a card with a RTL8187L or Atheros chipset, also read [[compatibility_drivers#which_is_the_best_card_to_buy|this]] first before purchasing. There are many available on the market for fairly low prices.  You are simply trading off distance, sensitivity and performance for cost.
  
 If you want to know if your existing card is compatible then use this page: [[compatible_cards|Tutorial: Is My Wireless Card Compatible?]] If you want to know if your existing card is compatible then use this page: [[compatible_cards|Tutorial: Is My Wireless Card Compatible?]]
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 The [[links]] page also generic wireless information and tutorials. The [[links]] page also generic wireless information and tutorials.
 +
 +===== Any GPS recommendation ?  =====
 +
 +The following 2 devices have been tested and work fine:
 +
 +  * BU-353
 +  * NL-402U USB
 +
 +However, anything that is [[http://www.catb.org/gpsd/hardware.html|compatible with GPSd]] will work. 
  
 ===== "command not found" error message  ===== ===== "command not found" error message  =====
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     * ftp://ftp.openwall.com/pub/wordlists/     * ftp://ftp.openwall.com/pub/wordlists/
     * http://www.openwall.com/mirrors/     * http://www.openwall.com/mirrors/
-  * ftp://ftp.ox.ac.uk/pub/wordlists/+  * GitHub 
 +    * https://github.com/danielmiessler/SecLists/tree/master/Passwords 
 +    * https://github.com/berzerk0/Probable-Wordlists 
 +    * https://github.com/search?q=wordlist
   * http://gdataonline.com/downloads/GDict/   * http://gdataonline.com/downloads/GDict/
-  * http://www.theargon.com/achilles/wordlists/ 
-  * http://theargon.com/achilles/wordlists/theargonlists/ 
   * ftp://ftp.cerias.purdue.edu/pub/dict/   * ftp://ftp.cerias.purdue.edu/pub/dict/
   * http://www.outpost9.com/files/WordLists.html   * http://www.outpost9.com/files/WordLists.html
-  * http://www.securinfos.info/wordlists_dictionnaires.php 
   * http://www.vulnerabilityassessment.co.uk/passwords.htm   * http://www.vulnerabilityassessment.co.uk/passwords.htm
   * http://packetstormsecurity.org/Crackers/wordlists/   * http://packetstormsecurity.org/Crackers/wordlists/
   * http://www.ai.uga.edu/ftplib/natural-language/moby/   * http://www.ai.uga.edu/ftplib/natural-language/moby/
-  * http://www.insidepro.com/eng/download.shtml 
-  * http://www.word-list.com/ 
   * http://www.cotse.com/tools/wordlists1.htm   * http://www.cotse.com/tools/wordlists1.htm
   * http://www.cotse.com/tools/wordlists2.htm   * http://www.cotse.com/tools/wordlists2.htm
-  * http://wordlist.sourceforge.net/ +  * http://wordlist.aspell.net/ 
- +  * https://darkz0ne.net/wordlists
-==== Build your own ==== +
- +
-Here are a few resources to build your own lists.  There are many, many more available if you search the Internet. +
- +
-  *[[https://code.goto10.org/svn/unpacked/sh/etemenanki/etemenanki.sh|Etemenanki]] is a shell script that "builds word dictionaries based on remote and local (hyper)text repositories"+
-  *[[http://awlg.org/index.gen|Associative Word List Generator]] allows you to build custom lists based on a "root" word. +
-  *[[http://forum.aircrack-ng.org/index.php?topic=4580.0|Password Generator]] is a program that generates all the variations of a string of characters based on the length of the string. +
-  *[[http://forum.aircrack-ng.org/index.php?topic=4877.msg27435#msg27435|Password Generator]] is a program that goes through standard and arbitrary permutations of strings. +
-  * [[http://forums.remote-exploit.org/programming/26847-coding-bruteforce-dictionary-generator.html|BackTrack thread]] regarding bruteforce dictionary generators.+
  
 ===== How do I recover my WEP/WPA key in windows ? ===== ===== How do I recover my WEP/WPA key in windows ? =====
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 From the command line you may use the //mergecap// program to merge //.cap// files (part of the Wireshark/Ethereal package or the win32 distribution):  From the command line you may use the //mergecap// program to merge //.cap// files (part of the Wireshark/Ethereal package or the win32 distribution): 
  
-  mergecap -w out.cap test1.cap test2.cap test3.cap +  mergecap -F pcap test1.cap test2.cap test3.cap -w out.cap 
 + 
 +It will merge test1.captest2.cap and test3.cap into out.cap
  
-It will merge test1.cap, test2.cap and test3.cap into out.cap +  mergecap -F pcap *.cap -w out.cap 
 +  
 +It will merge all the .cap files contained in the current folder into out.cap
  
 You may use the [[tools#merge|ivstools]] program to merge //.ivs// files (part of aircrack-ng package) You may use the [[tools#merge|ivstools]] program to merge //.ivs// files (part of aircrack-ng package)
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 To determine the frequency that a channel uses (or vice versa), check out: To determine the frequency that a channel uses (or vice versa), check out:
-[[http://www.rflinx.com/help/calculations/#2.4ghz_wifi_channels|Wifi Channels]] then select the "Channel Information" tab.  Or check out [[http://en.wikipedia.org/wiki/802.11_channels|Wikipedia List of WLAN Channels]].+[[http://www.cisco.com/en/US/docs/wireless/technology/channel/deployment/guide/Channel.html#wp134132|Wifi Channels]].  Or check out [[http://en.wikipedia.org/wiki/802.11_channels|Wikipedia List of WLAN Channels]].  This is a nice [[http://www.air-stream.org.au/files/agder_56.gif|graphic]] showing the channel assignments and their overlap.
  
  
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 ===== Why do I get 'SIOCSIFFLAGS : No such file or directory' error message ===== ===== Why do I get 'SIOCSIFFLAGS : No such file or directory' error message =====
  
-Some drivers require a firmware to be loaded (b43, prism54, zd1211rw, ...). The driver does it by itself when loaded. \\ +Some drivers require a firmware to be loaded (b43, prism54, zd1211rw, ...). The driver typically loads the firmware itself when started. \\ 
-In this case, the driver didn't find it because the firmware was not in the right place. To find the firmware's correct location, read the driver documentation.+In this case, the driver didn't find it because the firmware was not in the right place or is missing from the computer. To find the firmware's correct location, read the driver documentation.
  
  
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 Solution: Disable this function in UDEV Solution: Disable this function in UDEV
  
-Open /etc/udev/persistent-net-generator.rules in your prefered text editor+Open /etc/udev/persistent-net-generator.rules in your preferred text editor
  
 Search for  Search for 
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 Save and close. Save and close.
  
-Open /etc/udev/rules.d/z25_persistent-net.rules in your prefered text editor ("z25_" may be something different on your system).+Open /etc/udev/rules.d/z25_persistent-net.rules in your preferred text editor ("z25_" may be something different on your system).
  
 Search for the lines concerning your nwc and delete or just disable them by inserting a leading "#". Search for the lines concerning your nwc and delete or just disable them by inserting a leading "#".
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 ===== What is RSSI? ==== ===== What is RSSI? ====
  
-RSSI is means Received Signal Strength Indication. RSSI is a measurement of the received radio signal strength. It is the received signal strength in a wireless environment, in arbitrary units.+RSSI means Received Signal Strength Indication. RSSI is a measurement of the received radio signal strength. It is the received signal strength in a wireless environment, in arbitrary units.
  
 For more information, see http://en.wikipedia.org/wiki/RSSI For more information, see http://en.wikipedia.org/wiki/RSSI
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 See [[airmon-ng#how_do_i_put_my_card_back_into_managed_mode|airmon-ng documentation]]. See [[airmon-ng#how_do_i_put_my_card_back_into_managed_mode|airmon-ng documentation]].
- 
- 
- 
  
 ===== How Do I Check What Mode My Card Is In?  ===== ===== How Do I Check What Mode My Card Is In?  =====
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 [[http://www.linuxwireless.org/en/users/Drivers/zd1211rw/AddID|Adding new device IDs to zd1211rw]] [[http://www.linuxwireless.org/en/users/Drivers/zd1211rw/AddID|Adding new device IDs to zd1211rw]]
 +
 +
 +===== Why do I get "Error creating tap interface: Permission denied" or a similar message?  =====
 +
 +You receive one or both of the following errors:
 +   error creating tap interface: Permission denied
 +   error opening tap device: Permission denied
 +
 +This is caused by SELinux (Security Enhanced Linux) preventing the interface from starting.  To resolve, disable SELinux.  See the support forums for your particular linux to determine how to do this.
 +
 +===== Why airodump-ng doesn't display anything on Android terminal? =====
 +
 +By default, in settings, stty rows and columns are set to 0. Here are the settings:
 +  * stty columns 86
 +  * stty rows 39
 +
 +=====How much does Aircrack-ng cost?=====
 +
 +Aircrack-ng is "free software"; you can download it without paying any license fee. The version of Aircrack-ng you download isn't a "demo" version, with limitations not present in a "full" version; it is the full version.
 +The license under which Aircrack-ng is issued is mostly the GNU General Public License version 2. See the GNU GPL FAQ for some more information. 
 +
 +You may also want to check out the OpenSSL license included in our source code download.
 +
 +=====But I just paid someone on eBay for a copy of Aircrack-ng! Did I get ripped off?=====
 +
 +That depends. Did they provide any sort of value-added product or service, such as installation support, installation media, training, trace file analysis, or funky-colored socks? Probably not.
 +Aircrack-ng is available for anyone to download, absolutely free, at any time. Paying for a copy implies that you should get something for your money.
 +
 +=====Can I use Aircrack-ng commercially?=====
 +
 +Yes, if, for example, you mean "I work for a commercial organization; can I use Aircrack-ng to capture and asses WiFi network security in our company's networks or in our customer's networks?"
 +
 +If you mean "Can I use Aircrack-ng as part of my commercial product?", see the next entry in the FAQ.
 +
 +=====Can I use Aircrack-ng as part of my commercial product?=====
 +
 +As noted, Aircrack-ng is licensed under the GNU General Public License, version 2. The GPL imposes conditions on your use of GPL'ed code in your own products; you cannot, for example, make a "derived work" from Aircrack-ng, by making modifications to it, and then sell the resulting derived work and not allow recipients to give away the resulting work. You must also make the changes you've made to the Aircrack-ng source available to all recipients of your modified version; those changes must also be licensed under the terms of the GPL. See the GPL FAQ for more details; in particular, note the answer to the question about modifying a GPLed program and selling it commercially, and the question about linking GPLed code with other code to make a proprietary program.
 +You can combine a GPLed program such as Aircrack-ng and a commercial program as long as they communicate "at arm's length", as per this item in the GPL FAQ.
 +
 +We recommend keeping Aircrack-ng and your product completely separate.
 +
 +You may also want to check out the OpenSSL license included in our source code download.
  
faq.txt · Last modified: 2024/01/10 16:40 by mister_x