wireless lan on raspberry pi

Posted 12-29-2013 at 10:47 PM by drask
Updated 12-29-2013 at 11:17 PM by drask

I just had to rebuild my raspberry pi again. It seems to keep eating its sd card for some reason. I decided to forgo the gui this time since it's a headless server. I just access it via ssh and vnc and I think I'm ready to drop vnc. Generally all I use X for is editing files in leafpad, and I can just as easily run pluma locally and connect over sshfs.

I have a pretty simple wireless setup - an open wireless network with no keys or certificates (I live on a farm, I'm not concerned about people intercepting my wifi). But it took me some time to figure out how to configure it, so I wanted to record what I did.

Anyway, here is my /etc/network/interfaces file:

Code:

auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet dhcp
gateway 192.168.0.1

wpa-conf /etc/wpa_supplicant/wireless-lan.conf

and here are the contents of /etc/wpa_supplicant/wireless-lan.conf:

Code:

network={
	scan_ssid=1
	ssid="Wireless"
	key_mgmt=NONE
}

I'm not sure why I had to put the gateway into the interfaces file. Supposedly dhcp should set this, but without it I had no defined routes and couldn't get to anything outside my local subnet:

Code:

$ /sbin/route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 wlan0

If it had to go anywhere, it seems like it would belong in the network definition in the wireless-lan.conf file, since different wireless networks will probably sport different gateways. When connecting using Network Manager, it's never been a problem, so I'm not sure why it's not getting set automatically here.

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