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small spelling fixes
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paralax authored Jun 7, 2018
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Expand Up @@ -18,7 +18,7 @@ If you are new to the fascinating space of WiFi security, you might want to read

## What kind of data does it collect?

Nzyme collects, parses and forwards all relevant 802.11 management frames. Management frames are unecrypted so anyone close enough to a sending station (an access point, a computer, a phone, a lightbulb, a car, a juice maker, ...) can pick them up with nzyme.
Nzyme collects, parses and forwards all relevant 802.11 management frames. Management frames are unencrypted so anyone close enough to a sending station (an access point, a computer, a phone, a lightbulb, a car, a juice maker, ...) can pick them up with nzyme.

* Association request
* Association response
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I recommend to run nzyme on a Raspberry Pi 3 Model B. This is pretty much the reference architecture, because that is what I run it on. A Raspberry Pi 3 Model B running Nzyme with three WiFi adapters in monitor mode has about 25% CPU utilization in the busy frequencies of Downtown Houston, TX.

In the end, it shoulnd’t really matter what you run it on, but the docs and guides will most likely refer to a Raspberry Pi with a Raspbian on it.
In the end, it shouldn’t really matter what you run it on, but the docs and guides will most likely refer to a Raspberry Pi with a Raspbian on it.

### A Graylog setup

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#### Renaming WiFi interfaces (optional)

The interface names `wlan0`, `wlan1` etc are not always deterministic. Sometimes they can change after a reboot and suddenly nzyme will attempt to use the onboard WiFi chip that does not support moniotr mode. To avoid this problem, you can "pin" interface names by MAC address. I like to rename the onboard chip to `wlanBoard` to avoid accidental usage.
The interface names `wlan0`, `wlan1` etc are not always deterministic. Sometimes they can change after a reboot and suddenly nzyme will attempt to use the onboard WiFi chip that does not support monitor mode. To avoid this problem, you can "pin" interface names by MAC address. I like to rename the onboard chip to `wlanBoard` to avoid accidental usage.

**IMPORTANT NOTE:** Starting with Debian/Raspbian Stretch (late 2017), `udev` started to assign predictable network interface names by default. To enable this on Raspbian, you only have to delete the `/etc/systemd/network/99-default.link` symlink and restart your Raspberry Pi. After this, you'll see a predictable naming scheme that includes the MAC address of the device. For example, my previously named `wlan0` is now always `wlxx00c0ca95683b`. **Do this and skip all following steps for renaming network interfaces if you are on Debian/Raspbian Stretch.** (You can find out your version like this: `cat /etc/os-release`)

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Nzyme has a few CLI parameters, some of which can be helpful for debugging.

* `--config-file`, `-c`
* Path to config file. This is the only required parametr.
* Path to config file. This is the only required parameter.
* `--debug`, `-d`
* Override Log4j configuration and start with log level `DEBUG`.
* `--trace`, `-t`
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