Linux Wlan Config
Wireless cards.
Wireless cards are very different based upon what chipset you have. I personally use Atheros chipset cards which has screwed me up a bit with BackTrack as it has problems with using them for certain attacks.
What I will again show is generic commands for setting up and configuring your wireless interfaces.
The interface name (ath0 below) is entirely dependant on what chipset you are using, you may have any of the following:
ath0 wlan0 wifi0 eth0 You need to find out what you have. To do this you should execute the following bash command:
iwconfig -a
This will show all wireless extension on your machine. You should see all of your network interfaces, but only the wireless ones will have detailed information next to it. Now you know what your wireless cards name is...
Switch on your wireless card:
ifconfig ath0 up
To connect to an 'open' wireless access point (AP):
iwconfig ath0 essid 'nameofnetwork'
The 'nameofnetwork' is your Service Set IDentifer (SSID). That is the name of your network.
To configure a WEP key:
iwconfig ath0 key 3B5D3C7D207E37DCEEEDD301E3
To connect to a specific AP:
iwconfig ath0 ap 03:27:A8:BC:0F:F1
Where '03:27:A8:BC:0F:F1' is the MAC address of your AP, also known as the Basic Service Set IDentifier (BSSID).
Once you have setup your connection, you can get a DHCP address:
dhcpcd ath0
Then check that you have an IP from the wireless network.
But what if the network uses WPA? Again you need to assign the essid and maybe an AP MAC, then:
Create a text based file called wpa_supplicant.conf
Enter the following:
network={ essid="nameofnetwork" key_mgmt=WPA-PSK proto=WPA pairwise=TKIP group=TKIP psk="WPApassphrase"
}
Where nameofnetwork is your essid and psk is your WPA pre-shared key!
Then run the wpa_supplicant tool.
wpa_supplicant -D madwifi -i ath0 -c wpa_supplicant.conf
This will need altering depending on what chipset
Wireless cards are very different based upon what chipset you have. I personally use Atheros chipset cards which has screwed me up a bit with BackTrack as it has problems with using them for certain attacks.
What I will again show is generic commands for setting up and configuring your wireless interfaces.
The interface name (ath0 below) is entirely dependant on what chipset you are using, you may have any of the following:
ath0 wlan0 wifi0 eth0 You need to find out what you have. To do this you should execute the following bash command:
iwconfig -a
This will show all wireless extension on your machine. You should see all of your network interfaces, but only the wireless ones will have detailed information next to it. Now you know what your wireless cards name is...
Switch on your wireless card:
ifconfig ath0 up
To connect to an 'open' wireless access point (AP):
iwconfig ath0 essid 'nameofnetwork'
The 'nameofnetwork' is your Service Set IDentifer (SSID). That is the name of your network.
To configure a WEP key:
iwconfig ath0 key 3B5D3C7D207E37DCEEEDD301E3
To connect to a specific AP:
iwconfig ath0 ap 03:27:A8:BC:0F:F1
Where '03:27:A8:BC:0F:F1' is the MAC address of your AP, also known as the Basic Service Set IDentifier (BSSID).
Once you have setup your connection, you can get a DHCP address:
dhcpcd ath0
Then check that you have an IP from the wireless network.
But what if the network uses WPA? Again you need to assign the essid and maybe an AP MAC, then:
Create a text based file called wpa_supplicant.conf
Enter the following:
network={ essid="nameofnetwork" key_mgmt=WPA-PSK proto=WPA pairwise=TKIP group=TKIP psk="WPApassphrase"
}
Where nameofnetwork is your essid and psk is your WPA pre-shared key!
Then run the wpa_supplicant tool.
wpa_supplicant -D madwifi -i ath0 -c wpa_supplicant.conf
This will need altering depending on what chipset