Open-Source Security Tools
Aircrack-ng: Wireless Auditing Suite
Aircrack-ng is the classic wireless suite: airmon-ng puts a card into monitor mode, airodump-ng surveys and logs, aireplay-ng generates packets, and aircrack-ng cracks what the capture caught. Its modern professional work is WPA2/WPA3 audit evidence — capture a handshake from an authorized access point, then let hashcat turn it into a password-strength finding. The WEP days are gone, but the workflow discipline (surveillance, capture, deauth only where permitted, crack) is a standard the tool ecosystem still teaches.
Key points
- The chain in order: airmon-ng start wlan0 (monitor mode), airodump-ng wlan0mon (survey and note the target AP), targeted capture on the channel, then the crack stage.
- Handshake evidence is the modern goal: airodump-ng -c channel --bssid XX:XX --write capture waits for a client to (re)connect.
- Deauthentication is where ethics gets literal: forcing clients off an AP is a real denial of service on someone else's network, and it happens only where the signed engagement plan explicitly allows it.
- Cracking hands off to GPU: aircrack-ng -w wordlist capture --bssid handles CPU runs, and modern pipelines convert capture files for hashcat -m 22000.
- Hardware is half the battle: a monitor-capable adapter (Atheros and Ralink chipsets have long support history) is the difference between a working audit and a forum post.
- WPA3 complicates the classic attack: SAE-resistant handshakes pushed capture-based cracking onto transition-mode and downgrade-method work, so read current methods, the old tutorials lie.
- Scope discipline in wireless is real: physical range means neighboring networks you were never authorized to touch show up in the same survey; identify them and record them as out of scope.
- The professional deliverable is policy proof: handshake captured, cracking time and wordlist documented, password-policy findings written up, and the client's AP they asked you to test, not the neighbor's.
Field note
The monitor-mode adapter is everything — a cheap external card lives in my bag specifically because the laptop's wi-fi chipset refused injection in front of a client. Handshakes get hashed into an evidence folder, never a silly screen recording.
Frequently asked questions
Do I need a special Wi-Fi adapter?
Yes: monitor mode and (often) packet injection support are chipset requirements; embedded laptop cards frequently fail one or both.
Can it crack WPA3?
Direct capture-crack attacks mostly do not apply to SAE; current research and professional findings focus on downgrade opportunities and password-entry vulnerabilities instead.
Is deauthing legal against my own AP?
By and large on your own property or contracted scope it is an authorized test technique; jamming-adjacent legalities vary by jurisdiction; the engagement plan says it explicitly, in writing.
Is this how the WEP-era movie hacking works?
That era is dead: WEP fell to a replay-attack script, modern Wi-Fi's weak spot is the password humanity picked, which is why the crack stage mostly runs against wordlists.
How Kinetikatech helps with open-source security tools
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