Simple application of Iwpriv (Iwlist, iwconfig) under Linux

With the rapid development of wireless networks, many devices offer the ability to connect to wireless networks.

So what is the WiFi in Linux in the end how to configure, connect it??

Before we start the configuration, we'll talk about the IW family. IW is a common Wi-Fi Configuration tool under Linux, with corresponding libraries and source code on the Internet. The full name is Wirelesstools.

Configure the WiFi module and connect to the appropriate wireless network process: Use the IWPRIV command primarily

1. Scan for available wireless networks:

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1. Iwlist wifi-name Scanning

Wherein Wifi-name is the name of the wireless network card, such as the network card eth0 is the system default network card name, Wifi-name can be viewed with ifconfig, generally ra0.

2. Look at the network information you are scanning, and configure it as the type of network you want to connect to. The following network is scanned:

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2. Iwlist ra0 Scanning
4. = = =>rt_ioctl_giwscan (one) BSS returned, data->length = 1427
6. RA0 Scan Completed:
8. Cell 01-address:c4:ca:d9:1d:9e:a0
10. protocol:802.11b/g/n
12. ESSID: ""
14. Mode:managed
16. frequency:2.412 GHz (Channel 1)
18. quality=7/100 Signal level=-87 dBm Noise level=-82 dBm
20. Encryption Key:off
22. Bit rates:54 MB/s
24. Cell 02-address:fc:75:16:a1:a9:16
26. protocol:802.11b/g/n
28. ESSID: "Jxj_rd"
30. Mode:managed
32. frequency:2.452 GHz (Channel 9)
34. quality=94/100 Signal level=-53 dBm Noise level=-92 dBm
36. Encryption Key:on
38. Bit rates:54 MB/s
40. IE:WPA Version 1
42. Group Cipher:tkip
44. Pairwise ciphers (2): TKIP CCMP
46. Authentication Suites (1): PSK
48. Ie:ieee 802.11I/WPA2 Version 1
50. Group Cipher:tkip
52. Pairwise ciphers (2): TKIP CCMP
54. Authentication Suites (1): PSK
56. Cell 03-address:c4:ca:d9:02:2a:70
58. protocol:802.11b/g/n
60. ESSID: ""
62. Mode:managed
64. frequency:2.462 GHz (Channel 11)
66. quality=83/100 Signal level=-57 dBm Noise level=-92 dBm
68. Encryption Key:off
70. Bit rates:54 MB/s
72. Cell 04-address:14:d6:4d:75:ca:9c
74. protocol:802.11b/g/n
76. ESSID: "Liangym"
78. Mode:managed
80. frequency:2.472 GHz (Channel 13)
82. quality=100/100 Signal level=-27 dBm Noise level=-92 dBm
84. Encryption Key:on
86. Bit rates:54 MB/s
88. IE:WPA Version 1
90. Group cipher:ccmp
92. Pairwise ciphers (1): CCMP
94. Authentication Suites (1): PSK
96. Ie:ieee 802.11I/WPA2 Version 1
98. Group cipher:ccmp
100. Pairwise ciphers (1): CCMP
102. Authentication Suites (1): PSK

As above: The value of the Essid item is the name of the wireless network, such as "Jxj_rd" above. If the value is null, the option to hide the Essid is checked in the no-line by check box.

Essid is very critical, if it is hidden, it is not unable to connect, but need to crack, use other tools, very troublesome. As to how to crack, not the content described in this article, interested friends can search online.

Get the information of the network, the next step is to configure the connection options. To connect "JXJ_RD" as an example, let's look at the specific process:

(1) Set the type of network to connect to:

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1. Iwpriv ra0 set networktype=Infra

(2) Set the security mode of the wireless network to be connected:

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1. Iwpriv ra0 set authmode=WPA2PSK

(3) Set the network encryption mode: (CCMP is AES)

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1. Iwpriv ra0 set encryptype=TKIP

(4) Set the password for the connection: ******** is the password for the encrypted network

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1. Iwpriv ra0 set wpapsk=*******

(5) Connect to the network: There are two ways:

<1> with iwpriv command

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1. Iwpriv ra0 set ssid=jxj_rd

<2> with iwconfig command

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1. Iwconfig RA0 Essid Jxj_rd

At this point, if the password is correct, you can connect to the network jxj_rd. If you are not sure, you can use the command to view the status:

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1. Iwpriv RA0 Connstatus

Of course, you can also use the Iwconfig command to view the status, here no longer repeat.

Simple application of Iwpriv (Iwlist, iwconfig) under Linux