WEBVTT

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In the last lecture we've learned that not all wireless cards are good for hacking or even though the

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card supports monitor mode and packet injection it cannot be used on Linux that runss in a VM. In

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this lecture

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we'll talk about how to choose the right external USB card and then how to connect that card to

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Kali in a VM. Wireless cards supporting monitor mode and packet injection

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permit an ethical or black hat hacker to listen on other WiFi conversations and even inject malicious 

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packets into a network.

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Most external wireless cards aren't good at doing anything other than what's required to establish a

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basic WiFi connection.

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Before buying an external WIFI card that costs between $15 and $50 US dollars

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you have to check if the chipset inside the card is good and if the right Linux drivers are available.

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If you are in doubts

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my advice is to buy the card from a store that accepts returns if it's possible.

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Note that the brand is different from the chipset; you'd normally buy a brand like TP-link, Netgear

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or Asus and you don't know about the chipset inside it.

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The most important is the chipset and the drivers for that chipset, not the brand. To make things

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easier for you

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I've created a list with chipsets that are known to support packet injection and mode monitoring.

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I won't talk about each of them but only about Athereos AR9271 which is a well known

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and supported chipset. The Alpha UB adapter is one of the favorites in the hacking community:

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it's fast, 

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long range, well-supported and stable. Or a chiper adapter that uses this chipset is TP-Link. 

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However check that it uses the Atheros chipset and not another one.

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Other considerations in selecting an external Wi-Fi adapter,

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aside from the chipset, is the frequency on which the adapter operates. While most Wi-Fi devices,


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including IoT devices, operate on the 2.4 GHz band, 

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many newer devices also offer 5 GHz networks. If 5 gigahertz is important to you

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there are many 5 gigahertz WiFi cards that support the monitor mode and packet injection. An example

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is Panda Wireless POU09.

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This is a very good card that works both with2.4 and 5 gigahertz.

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As a conclusion, before buying an external USB WiFi card,

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some research is needed!

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In the next lecture

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I'll show you how to connect to the external WiFi adapter to Kali Linux in a VM.