Howto Quick n Easy Manual Wireless Wpa2 PSK

Manual Commandline Network setup:

So this guide is for those of you who only connect to the same router via Wpa2/Psk encrypted wireless. Although if you want to, you can scan and connect to any wireless connection manually using the wireless-tools suite of scripts.

Wireless setup via a Gui:

If you regularly roam and need to search for and connect to different wireless connections, i’d suggest you install wicd-gtk, it’s in most Linux distro repositories. There’s also network-manager-gnome which provides the nm-applet gui. I prefer the manual method as the gui apps tend to write over system config files. For example, nm-applet removes your dns configs in /etc/resolv.conf.

Wireless Firmware:

Ok, you need to have your wireless drivers installed and working. I’m using a Broadcom BCM4138, whose drivers are supplied via the “firmware-b43-installer” which fetches the firmware from openwrt.

More on B43 herehttp://linuxwireless.org/en/users/Drivers/b43#b43_and_b43legacy

Next up you need to authenticate with Wpa using PSK TKIP, this is accomplished by installing wpasupplicant:

sudo apt-get update

sudo apt-get install wpasupplicant

Now you need to edit a couple of files:

sudo vim /etc/network/interfaces

Supposing your wireless card is called wlan0, and you want a static IP address you add this:

auto wlan0
iface wlan0 inet static
address 192.168.0.3
netmask 255.255.255.0
gateway 192.168.0.1
wpa-ssid youressid
wpa-psk yourpassword

Just to make sure you can surf the net, check your dns config. I put my router IP and the Google Open DNS IP as well.

sudo vim /etc/resolv.conf

And add:

nameserver 192.168.0.1
nameserver 8.8.8.8

Now to connect, you only have to issue one command, then every time you login after that you will automatically be connected:

sudo ifup wlan0

That’s it, no need for Gui applications sucking resources and overwriting important files. Just a quick and easy auto-connected wireless every time you bootup.

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