Difference between revisions of "WiFi"
From ArmadeusWiki
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==Common operations== | ==Common operations== | ||
| − | ====List network interfaces supporting WiFi | + | ====List network interfaces supporting WiFi==== |
<pre class=apf> | <pre class=apf> | ||
# iwconfig | # iwconfig | ||
Revision as of 17:33, 14 January 2010
 |
Note: To configure WiFi you need to install wireless tools first and of course to have a running WiFi interface like: the APF27 wireless extension board or a USB to WiFi adapter, with corresponding Linux drivers loaded. |
Contents
Common operations
List network interfaces supporting WiFi
# iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
sit0 no wireless extensions.
wmaster0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:""
Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
Tx-Power=0 dBm
Retry min limit:7 RTS thr:off Fragment thr=2352 B
Encryption key:off
Power Management:off
Link Quality:0/100 Signal level:112/146 Noise level:0/0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
Show all Access Points (AP) available for your APF
# iwlist wlan0 scan
wlan0 Scan completed :
Cell 01 - Address: XX:XX:XX:66:47:48
ESSID:"TOTO"
Mode:Master
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=88/100 Signal level:25/100
Encryption key:on
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
48 Mb/s; 54 Mb/s
Extra:tsf=00000009d398fec8
Extra: Last beacon: 1390ms ago
...
Connect to an unencrypted AP
# iwconfig wlan0 essid AP_NAME
Get an IP address
# udhcpc -i wlan0
Encryption settings
To configure WiFi cryptography, only WEP can be set as is. If you want to configure dongle for WPA, install wpa_supplicant.
WEP configuration
This example is given for a WiFi Access Point named armadeus, but the key is false of course ;) :
# iwconfig wlan0 essid armadeus # iwconfig wlan0 key 12345678901234567890 # ifconfig wlan0 up firmware: requesting rt73.bin ADDRCONF(NETDEV_UP): wlan0: link is not ready # ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Now, the WiFi adapter is ready and attached :
# iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
sit0 no wireless extensions.
wmaster0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"armadeus"
Mode:Managed Frequency:2.437 GHz Access Point: 00:1B:2F:E7:E4:08
Bit Rate=2 Mb/s Tx-Power=7 dBm
Retry min limit:7 RTS thr:off Fragment thr=2352 B
Encryption key:XXXXXXXXXXXXXXXXXXXXXXXXXX Security mode:restricted
Power Management:off
Link Quality:0/100 Signal level:73/146 Noise level:0/0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
We can configure the network to access internet via the WiFi interface instead of the Ethernet one :
# ifconfig eth0 down # ifconfig wlan0 192.168.0.212 # route add default gw 192.168.0.1 dev wlan0
And configure the nameserver in /etc/resolv.conf
domain dev.null nameserver 192.168.0.207 ~ ~ ~
We can now ping the best website in the world :
# ping www.armadeus.org PING www.armadeus.org (213.186.33.5): 56 data bytes 64 bytes from 213.186.33.5: seq=0 ttl=122 time=66.735 ms 64 bytes from 213.186.33.5: seq=1 ttl=122 time=50.392 ms ^C --- www.armadeus.org ping statistics --- 2 packets transmitted, 2 packets received, 0% packet loss round-trip min/avg/max = 50.392/58.563/66.735 ms
Surf on the net
To surf on the web, you can use (for example) links software :
# links www.armadeus.org
It's an ASCII internet browser. For more informations about Links.
