ubuntu networking

alcoholic_engineer

So i was an idiot, and accidentally changed my network settings when I took my laptop to school. Can someone running ubuntu post their /etc/network/interfaces files, so I can compare it.

I am running a wep, with the wireless connection set as ath0.

For some reason I am able to occasionally make the internet work, but when I restart, I lose all connectivity. It is very iffy to revive.

thanks

Barrakketh

alcoholic_engineer wrote:

So i was an idiot, and accidentally changed my network settings when I took my laptop to school. Can someone running ubuntu post their /etc/network/interfaces files, so I can compare it.

I am running a wep, with the wireless connection set as ath0.

For some reason I am able to occasionally make the internet work, but when I restart, I lose all connectivity. It is very iffy to revive.

thanks

Eh...I'm not going to post mine because it wouldn't help you at all. However, is there more than one network interface (aside from loopback) that are being started on boot?

alcoholic_engineer

here it is

auto lo
iface lo inet loopback

iface eth0 inet dhcp

auto eth1
#iface eth1 inet dhcp

auto eth2
#iface eth2 inet dhcp

auto ath0
iface ath0 inet dhcp 
wireless-essid ***
wireless-key s:*******************

auto wlan0
iface wlan0 inet dhcp

Barrakketh

alcoholic_engineer wrote:

here it is

auto lo
iface lo inet loopback

iface eth0 inet dhcp

auto ath0
iface ath0 inet dhcp 
wireless-essid ***
wireless-key s:*******************

auto wlan0
iface wlan0 inet dhcp

Maybe there's something odd about the way the drivers for your wireless works, but why is there a wlan0 entry active along with ath0?

The auto entries for eth* should be commented out.

alcoholic_engineer

no change, it still doesnt want to connect.

even when I just try and set up the connection every time i turn it on, it is a bitch to try and get working.

Barrakketh

alcoholic_engineer wrote:

no change, it still doesnt want to connect.

even when I just try and set up the connection every time i turn it on, it is a bitch to try and get working.

What does "iwconfig" return after you boot up (and are still unable to connect)?

alcoholic_engineer

it looks something like this
lo, eth0, sit0 all have no wireless extension

the ath0 gives the following info though

IEEE 802.11 ESSID:"**"
mode: managed        frequency:2.412ghz       access point: Not-Associated
bit rate: 1 mb/s  tx-power: 18dbm  sensitivity= 0/3
retry:off       rts thr:off   fragment thr:off
power management:off
link quality=0/94
signal level=-95dbm    noise level= -95dbm   
Rx invalid nwid:0      rx invalid crypt:0   rx invlid crypt:0
Tx excessive retries:0     invalid misc:0    missed beacon:0

every other time that I havent got my network set up right, it takes a few tries, but I am able to connect to the network eventually. This time I have only been able to connect once in 3 days. (it isnt the network because I am using my other computer to type this).

Barrakketh

What wireless adapter are you using?

What's the output of

sudo /etc/init.d/networking restart

?

alcoholic_engineer

i am typing this on my other computer so i am gonna just summarize.

the send packet: network is unreachable
error for wireless request "set encode" (8b2a)
set failed on device ath0; invalid argument

a bunch of crap

dhcpdiscover on ath0 to 255.255.255.255 port 67 intervals 6, 12, 13, 15, 7, 8
no dhcpoffers recieved
no working leases in persistant database - sleeping

sicosifaddr: no such device
wlan0:error while getting interface flags: no such device
bind socket to interface: no such device
failed to bring up wlan0

Barrakketh

Try "sudo modprobe wlan_wep" and then restart networking again. Anything change?

alcoholic_engineer

no change at all: just my eth0 was restarted for some reason.

Barrakketh

Does:

sudo iwlist scan

list your router (I'm assuming that you haven't diabled SSID broadcasting on it)?

EDIT: You haven't stated what wireless adapter you're using yet.

alcoholic_engineer

lo        Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

ath0      Scan completed :
          Cell 01 - Address: 00:18:3F:E6:9A:E9
                    ESSID:"i-a-khan"
                    Mode:Master
                    Frequency:2.437 GHz (Channel 6)
                    Quality=5/94  Signal level=-90 dBm  Noise level=-95 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
          Cell 02 - Address: 00:19:E4:1C:05:09
                    ESSID:"hbprint"
                    Mode:Master
                    Frequency:2.447 GHz (Channel 8)
                    Quality=2/94  Signal level=-93 dBm  Noise level=-95 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
          Cell 03 - Address: 00:18:F8:3E:B1:83
                    ESSID:"linksys_SES_32437"
                    Mode:Master
                    Frequency:2.437 GHz (Channel 6)
                    Quality=16/94  Signal level=-79 dBm  Noise level=-95 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
                    Extra:wpa_ie=dd180050f20101000050f20201000050f20201000050f20 20000
          Cell 04 - Address: 00:18:F8:3F:25:C0
                    ESSID:"graynet"
                    Mode:Master
                    Frequency:2.437 GHz (Channel 6)
                    Quality=5/94  Signal level=-90 dBm  Noise level=-95 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
                    Extra:wpa_ie=dd180050f20101000050f20201000050f20201000050f20 20000
          Cell 05 - Address: 00:14:BF:AF:61:5B
                    ESSID:"DeanLinksys"
                    Mode:Master
                    Frequency:2.437 GHz (Channel 6)
                    Quality=1/94  Signal level=-94 dBm  Noise level=-95 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
                    Extra:wpa_ie=dd180050f20101000050f20201000050f20201000050f20 20000

sit0      Interface doesn't support scanning.

and as for the wireless adaptor, it is a ar5212 802.11b/g

Barrakketh

Is the computer that you're typing this on wired, or using wireless as well? It looks like there is a ton of "noise" in your area. The only router in that list I see that would be even remotely usable is linksys_SES_32437.

alcoholic_engineer

yea, the linksys is mine: my desktop is running wireless as well, and I never have any issues with its connectivity.

alcoholic_engineer

holy crap, it works for some reason now: I switched it from dhcp for a minute and then back (i was just messing around) and now the damn thing works.

fuckin weird- thanks very much for your help though