Connecting to wifi using wpa_supplicant

Question

I have some problems connecting to my WiFi (WPA2, standard settings) using wpa_supplicant. My /etc/wpa_supplicant.conf is as follows:

network={
    ssid="MYWIFI"
    psk=********
}

then my /etc/network/interfaces:

auto lo
iface lo inet loopback

After putting wpa_supplicant -D -i wlan0 -c /etc/wpa_supplicant.conf into the console I get a connection, it says:

Successfully initialized wpa_supplicant.

But there is no connection. How can I get this to work?

Answer 1

Looks like you're missing the wlan0 instance to /etc/network/interfaces:

auto wlan0
iface wlan0 inet dhcp
  wpa-conf /etc/wpa_supplicant.conf

For WPA2 I have a few more lines in the wpa configuration file:

network={
ssid="myssid"
proto=RSN
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
psk="verrysecretpw"
}

I don't need to bring up the interface manually from the console, it just connects upon booting the system.