Kenneth: /* wpa_supplicant */

2024-02-11T01:20:47Z

wpa_supplicant

@@ Line 83: / Line 83: @@
 generated from:
   wpa_passphrase MYSSID >> /etc/wpa_supplicant/wpa_supplicant.conf
 == Wireless WEP Authentication ==

Kenneth: /* madwifi */

2024-01-28T22:18:49Z

madwifi

← Older revision		Revision as of 22:18, 28 January 2024
Line 57:		Line 57:

	See [[madwifi]]		See [[madwifi]]

			== wpa_supplicant ==

			/etc/wpa_supplicant/wpa_supplicant.conf
			<pre>
			ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
			update_config=1
			country=US

			network={
			ssid="MYSSID"
			psk="MYPASSWORD"
			}
			</pre>

			or:
			<pre>
			network={
			ssid="MYSSID"
			#psk="MYPASSWORD"
			psk=81cffae6b3b3594ad304fec7c56e200a9bdc75ec83d074e22a0241b65f0f453a
			}
			</pre>

			generated from:
			wpa_passphrase MYSSID >> /etc/wpa_supplicant/wpa_supplicant.conf

	== Wireless WEP Authentication ==		== Wireless WEP Authentication ==

Kenneth: Created page with "== Common Tasks == Wireless interface tools: ifconfig # set interface ip address and up/down state iwconfig # configure wireless settings (SSID, key, mode) iwlist # s..."

2014-12-19T15:16:57Z

Created page with "== Common Tasks == Wireless interface tools: ifconfig # set interface ip address and up/down state iwconfig # configure wireless settings (SSID, key, mode) iwlist # s..."

New page

== Common Tasks ==

Wireless interface tools:
ifconfig # set interface ip address and up/down state
iwconfig # configure wireless settings (SSID, key, mode)
iwlist # scan wireless
dhclient # dhcp client

Set ESSID:
iwconfig [interface] essid [essid]
iwconfig eth1 essid toast

Set managed mode:
# note: interface may need to be down to change (ifconfig eth1 down)
iwconfig eth1 mode Managed

Set WEP key:
iwconfig eth1 key 0123-4567-89
iwconfig eth1 key off

WPA:
# type password, hit enter
wpa_passphrase [SSID] >> /etc/wpa_supplicant/wpa_supplicant.conf

<pre>
network={
ssid="testnetwork"
#psk="testpassword"
psk=ed5b87ba31bf9d6611576f94c57e848696005ea2d5743baab976a48ed11d1b2a
}
</pre>

# start wpa_supplicant daemon
wpa_supplicant -c /etc/wpa_supplicant/wpa_supplicant.conf -i wlan0 -D madwifi
# debug mode:
wpa_supplicant -c wpa.conf -i wlan0 -d

DHCP client:
dhclient [interface] # get DHCP address
dhclient -r [interface] # release DHCP address
dhclient [interface] -H [hostname] # get DHCP address and set hostname

Other examples:
iwconfig wlan0 mode managed
iwpriv wlan0 set AuthMode=WPAPSK
iwpriv wlan0 set EncrypType=TKIP
iwpriv wlan0 set WPAPSK="AP's wpa-preshared key"
iwconfig wlan0 essid "AP's SSID"

Scan:
iwlist [interface] scan

Common wireless interfaces:
eth1, wlan0, ath0

== madwifi ==

See [[madwifi]]

== Wireless WEP Authentication ==

Shared WEP key:
iwconfig ath0 key <yourkey>

# operating in a restricted, shared-key environment
iwpriv ath0 authmode 2

# operating in open system key (which is often considered more secure)
iwpriv ath0 authmode 1

== Connecting to AP ==

Connecting to an open AP:
iwconfig ath0 essid "eddie"
iwconfig ath0 ap 00:06:25:E8:3A:05

Connect to first available open AP:
iwconfig ath0 ap any
iwconfig ath0 ap auto

== Connecting with DHCP ==

DHCP Connection:
dhclient ath0
dhcpcd ath0

== Connect without DHCP ==

ifconfig ath0 <IP address> netmask <netmask> up

route add default gw <gateway hostname>
route add default gw <gateway address>

vi /etc/resolv.conf
search t0e.org
nameserver 10.10.10.1

== CentOS interface setup ==

/etc/sysconfig/network-scripts/ifcfg-ath0
<pre>
DEVICE=ath0
BOOTPROTO=dhcp
HWADDR=00:0F:20:95:6A:9A
ONBOOT=no
DHCP_HOSTNAME=kencent
</pre>

== Ubuntu interface setup ==

/etc/network/interfaces:
<pre>
iface lo inet loopback
auto lo

iface eth0 inet dhcp

iface wlan0 inet manual
allow-hotplug wlan0
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp
</pre>

== Connecting to an AP with WEP ==

using shared WEP key:
iwpriv ath0 authmode 2

using open WEP key (which is often considered more secure):
iwpriv ath0 authmode 1

Specify WEP key:
<pre>
iwconfig ath0 key <wep key (in hex)>
iwconfig ath0 key <s:ASCII string of key>
</pre>

== Connecting to an AP with WPA ==

Make PSK:
wpa_passphrase My_WPA_Protected_AP_ESSID "Some_Decent_PassPhrase_of_up_64_Characters" >> /etc/wpa_supplicant.conf

Edit /etc/wpa_supplicant.conf and add the lines into the network section created above:
key_mgmt=WPA-PSK
# proto=WPA
proto=RSN

Uncomment the proto=WPA line (and comment out the RSN line) to enable WPA. Leave as is for WPA2 (stronger encryption).

Secure:
chmod 640 /etc/wpa_supplicant.conf

Full example:
modprobe ath_pci # if running pre-r1408 Madwifi code, then also: wlanconfig ath0 create wlandev wifi0 wlanmode sta
iwconfig ath0 essid "My_WPA_Protected_AP_ESSID"
ifconfig ath0 192.168.0.100 up
/usr/local/bin/wpa_supplicant -dd -Dmadwifi -iath0 -c/etc/wpa_supplicant.conf

See if connected:
iwconfig ath0

Automate wpa_supplicant:
#!/bin/sh
modprobe ath_pci (If running pre-r1408 Madwifi code, then also: wlanconfig ath0 create wlandev wifi0 wlanmode sta)
iwconfig ath0 essid "My_WPA_Protected_AP_ESSID"
ifconfig ath0 192.168.0.100 up
wpa_supplicant -Bw -Dmadwifi -iath0 -c/etc/wpa_supplicant.conf

old note:
wpa_supplicant -Bw -Dwext -iath0 -c/etc/wpa_supplicant.conf

# if you are using a Linux version smaller than 2.6.14
wpa_supplicant -Bw -Dmadwifi -iath0 -c/etc/wpa_supplicant.conf

References:
*[http://madwifi.org/wiki/UserDocs/WPA_PSK_on_Both_Ends#TheStationclientSide UserDocs/WPA_PSK_on_Both_Ends - madwifi.org - Trac]

== wifi init.d ==

<pre>
#!/bin/sh
#
# chkconfig: - 99 01
# description: Starts and stops the Wireless
#
# lock: /var/run/wifi
# config: /etc/sysconfig/wifi
# config: /etc/wpa_supplicant.conf

# Source function library.
if [ -f /etc/init.d/functions ] ; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ] ; then
. /etc/rc.d/init.d/functions
else
exit 1
fi

# /etc/sysconfig/wifi
# WIFI_SSID=ssid
# WIFI_DHCP=yes
# WIFI_AUTH=wpa|wep
if [ ! -e /etc/sysconfig/wifi ] ; then
echo "ERROR: /etc/sysconfig/wifi is missing"
exit 1
else
. /etc/sysconfig/wifi
fi

# WPA
# wpa_passphrase "My_WPA_Protected_AP_ESSID" "Some_Decent_PassPhrase_of_up_64_Characters" >> /etc/wpa_supplicant.conf

LOCKFILE=/var/run/wifi

case "$1" in
start)
echo -n "Starting wifi: "
if [ -e $LOCKFILE ] ; then
echo -n "Wifi already running"
failure ; echo ; exit 1
fi
touch $LOCKFILE
modprobe ath_pci
iwconfig ath0 essid "${WIFI_SSID}"
if [ "${WIFI_AUTH}" = "wpa" ] ; then
wpa_supplicant -Bw -Dmadwifi -iath0 -c/etc/wpa_supplicant.conf
else
echo -n "code not written yet!"
failure ; echo ; exit 1
fi
if [ "${WIFI_DHCP}" = "yes" ] ; then
dhclient ath0 &> /dev/null
if [ "$?" != "0" ] ; then
echo -n "unable to obtain ip address!"
failure ; echo ; exit 1
fi
else
echo "code not written yet!"
failure ; echo ; exit 1
fi
success ; echo ; exit 0
;;
stop)
echo -n "Stopping wifi:"
rm -f $LOCKFILE
dhclient -r ath0 &>/dev/null
killall wpa_supplicant &>/dev/null
modprobe -r ath_pci
success ; echo ; exit 0
;;
restart)
$0 stop
$0 start
;;
status)
if [ -e $LOCKFILE ] ; then
echo "Wifi is running"
exit 1
else
echo "Wifi is stopped"
exit 1
fi
;;
*)
echo $"Usage: $0 {start|stop|restart|status}"
exit 2
esac

</pre>

== Notes ==

Restart network:
service network restart

Shut down madwifi:
ifconfig ath0 down
ifconfig wifi0 down

iwconfig ath0 mode master
iwconfig ath0 essid paradiso
iwconfig ath0 channel 9
iwpriv ath0 mode 2
ifconfig ath0 up

References:
*[http://ubuntuforums.org/showthread.php?t=105437 HOWTO: Latest madwifi svn snapshot - Ubuntu Forums]
*[http://madwifi.org/wiki/UserDocs/FirstTimeHowTo UserDocs/FirstTimeHowTo - madwifi.org - Trac]

== WPA with Linux ==

wpa_passphrase YOURSSID yourpassphrase > /etc/wpa_supplicant.conf
chmod 640 /etc/wpa_supplicant.conf
wpa_supplicant -Bw -Dwext -iath0 -c/etc/wpa_supplicant.conf
# or use -Dmadwifi instead of -Dwext

References:
*[http://madwifi.org/wiki/UserDocs/FirstTimeHowTo#ConnectingtoanAPwithWPA Connecting to an AP with WPA]
*[http://madwifi.org/wiki/UserDocs/802.11i Setting up a Client Using WPA-PSK]
*[http://madwifi.org/wiki/UserDocs/WPA_PSK_on_Both_Ends#TheStationclientSide WPA on madwifi: AP & Station]

Linux/Wifi - Revision history

Kenneth: /* wpa_supplicant */

Kenneth: /* madwifi */

Kenneth: Created page with "== Common Tasks == Wireless interface tools: ifconfig # set interface ip address and up/down state iwconfig # configure wireless settings (SSID, key, mode) iwlist # s..."