archive/wlan-debian.html

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   3                 <title>Automatic wifi without heavy network manager on debian</title>
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   7                 <h3>PREREQUISITES</h3>
   8                 <p>Install wpa_supplicant and wireless-tools(standard in most distros).<br />
   9 <pre># apt-get install wireless-tools wpa_supplicant</pre>
  10                 <br />
  11                 Identify your wifi controller. This can usually be found by typing<br />
  12                 <pre>$ iwconfig</pre>
  13                 <br />
  14                 Locate all the config files for your desired networks. Mine are placed in /etc/network/wifi/<SSID>.conf. More info on creating configs in the end of the file.</p>
  15
  16                 <h3>INSTALLATION</h3>
  17                 <p>Create the SSID selection script.<br />
  18                 I've put mine in /etc/network/wifi/select<br />
  19 <pre>
  20 #!/bin/sh
  21 ifconfig [INTERFACE] up 1> /dev/null && { iwlist [INTERFACE] scan | grep -o "\".*\"" | tr -d \'\" | sort | uniq; grep -o "map\ .*" /etc/network/interfaces | awk '{print $2}'; } | sort | uniq -d | head -1
  22 </pre>
  23                 <br />
  24                 Make it executable.<br />
  25                 <pre># chmod +x /etc/network/wifi/select</pre>
  26                 <br />
  27                 Change in /etc/network/interfaces the [INTERFACE] specification.<br />
  28 <pre>
  29 mapping [INTERFACE]
  30         script /etc/network/wifi/select
  31         map [SSID]1
  32         map [SSID]2
  33         ..
  34         map eduroam
  35
  36 iface [SSID]1 inet dhcp
  37 wpa_conf /etc/network/wifi/[SSID]1.conf
  38
  39 iface [SSID]2 inet dhcp
  40 wpa_conf /etc/network/wifi/[SSID]2.conf
  41
  42 ..
  43
  44 iface eduroam inet dhcp
  45 wpa_conf /etc/network/wifi/eduroam.conf
  46 </pre>
  47                 <br />
  48                 You're finished! Restart the network service with:<br />
  49                 <pre># service networking restartworking restart</pre>
  50                 And you can connect to a available network by running this command.<br />
  51                 <pre># ifup [INTERFACE]</pre>
  52                 If you want to force an [SSID] you can run:<br />
  53                 <pre># ifup [INTERFACE]=[SSID]</pre></p>
  54
  55                 <h3>CONFIG CREATION</h3>
  56                 <p>Standard wpa2 network configs can be created by running:<br />
  57                 <pre># wpa_passphrase [SSID] [PASSWORD] > /etc/network/wifi/[SSID].conf</pre>
  58                 <br />
  59                 For eduroam you can use this example:<br />
  60 <pre>
  61 network={
  62         ssid="eduroam"
  63         key_mgmt=WPA-EAP
  64         eap=TTLS
  65         phase2="auth=MSCHAPV2"
  66         ca_cert="/etc/ssl/certs/AddTrust_External_Root.pem"
  67         identity="login@university.nl"
  68         scan_ssid=1
  69         password="YOURPASSWORD"
  70 }
  71 </pre>
  72                 If you don't want your password in a config you can also use a hash generated by this command. (Don't forget to remove it from ~/.bash_history afterwards)<br />
  73 <pre>$ echo -n [PASSWORD] | iconv -t UTF16LE | openssl md4</pre>
  74                 You should replace the plaintext string with: "hash:[HASHOUTPUT]"<br />
  75                 note: don't use quotes.</p>
  76                 <footer>update 2014-03-04: fixed a few small errors concerning hashing and config files</footer>
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