*sigh*...wireless networks, b'ys.
Ok so my school provides pretty decent Wireless G coverage to the parts of the campus I frequent. I bought a D-LINK AirPlus DWL-G650 PCMCIA card so I could get in on the wireless thing with my laptop.
I plugged the card into the side of the laptop, and issued a "sudo ifconfig ath0 up". The device roared to life, and I saw a bunch of flashing lights. So now that the card is active, I try to connect to the wireless network.
Using a PHP script I found on the net (can't remember where), I was able to extract the commands used to connect to a wireless network.
"sudo iwlist ath0 scan" returned the following:
I next issued a "sudo iwconfig ath0 essid uw-wireless key off". That appeared to work fine. It printed nothing, and now "iwconfig ath0" returns the following:Code:conor@conor-lt:~$ iwlist ath0 scan ath0 Scan completed : Cell 01 - Address: 00:01:F4:ED:1A:4B ESSID:"uw-wireless" Mode:Master Frequency:2.412 GHz (Channel 1) Quality=0/94 Signal level=-95 dBm Noise level=-95 dBm Encryption key:off Bit Rate:1 Mb/s Bit Rate:2 Mb/s Bit Rate:5 Mb/s Bit Rate:11 Mb/s Extra:bcn_int=100 Cell 02 - Address: 00:01:F4:ED:1B:F5 ESSID:"uw-wireless" Mode:Master Frequency:2.412 GHz (Channel 1) Quality=0/94 Signal level=-95 dBm Noise level=-95 dBm Encryption key:off Bit Rate:1 Mb/s Bit Rate:2 Mb/s Bit Rate:5 Mb/s Bit Rate:11 Mb/s Extra:bcn_int=100 Cell 03 - Address: 00:01:F4:ED:1B:D5 ESSID:"uw-wireless" Mode:Master Frequency:2.437 GHz (Channel 6) Quality=0/94 Signal level=-95 dBm Noise level=-95 dBm Encryption key:off Bit Rate:1 Mb/s Bit Rate:2 Mb/s Bit Rate:5 Mb/s Bit Rate:11 Mb/s Extra:bcn_int=100
The following is the ouput of "sudo dhclient ath0":Code:conor@conor-lt:~$ iwconfig ath0 ath0 IEEE 802.11g ESSID:"uw-wireless" Mode:Managed Frequency:2.437 GHz Access Point: 00:01:F4:ED:1B:D5 Bit Rate:11 Mb/s Tx-Power:50 dBm Sensitivity=0/3 Retry:off RTS thr:off Fragment thr:off Power Management:off Link Quality=31/94 Signal level=-64 dBm Noise level=-95 dBm Rx invalid nwid:5704 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0
So it's definitely talking to the network.Code:conor@conor-lt:~$ sudo dhclient ath0 Internet Systems Consortium DHCP Client V3.0.1 Copyright 2004 Internet Systems Consortium. All rights reserved. For info, please visit http://www.isc.org/products/DHCP sit0: unknown hardware address type 776 sit0: unknown hardware address type 776 Listening on LPF/ath0/00:0f:3d:52:0f:f6 Sending on LPF/ath0/00:0f:3d:52:0f:f6 Sending on Socket/fallback DHCPREQUEST on ath0 to 255.255.255.255 port 67 DHCPREQUEST on ath0 to 255.255.255.255 port 67 DHCPACK from 129.97.192.1 bound to 129.97.192.166 -- renewal in 464 seconds.
Now at this point, under windows, I go to www.laptop.uwaterloo.ca, which redirects me to a sign-in page and I sign on using my username and password. Unfortunately, under Linux, epiphany gives me a host not found.
Furthermore, here are the results of me attempting to ping several addresses:
If I open up a browser and navigate to 129.97.192.166, I get my local apache2 default web server.Code:conor@conor-lt:~$ ping 129.97.192.166 PING 129.97.192.166 (129.97.192.166) 56(84) bytes of data. 64 bytes from 129.97.192.166: icmp_seq=1 ttl=64 time=0.053 ms 64 bytes from 129.97.192.166: icmp_seq=2 ttl=64 time=0.065 ms 64 bytes from 129.97.192.166: icmp_seq=3 ttl=64 time=0.047 ms 64 bytes from 129.97.192.166: icmp_seq=4 ttl=64 time=0.066 ms 64 bytes from 129.97.192.166: icmp_seq=5 ttl=64 time=0.048 ms --- 129.97.192.166 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4001ms rtt min/avg/max/mdev = 0.047/0.055/0.066/0.012 ms conor@conor-lt:~$ ping 127.0.0.1 PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data. 64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.065 ms 64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.067 ms 64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.048 ms 64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.057 ms 64 bytes from 127.0.0.1: icmp_seq=5 ttl=64 time=0.047 ms --- 127.0.0.1 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 3999ms rtt min/avg/max/mdev = 0.047/0.056/0.067/0.012 ms conor@conor-lt:~$ ping 129.97.192.165 connect: Network is unreachable conor@conor-lt:~$ ping 129.97.192.164 connect: Network is unreachable conor@conor-lt:~$ ping 129.97.192.163 connect: Network is unreachable conor@conor-lt:~$ ping 129.97.192.167 connect: Network is unreachable conor@conor-lt:~$ ping 129.97.192.168 connect: Network is unreachable conor@conor-lt:~$ ping 129.97.192.169 connect: Network is unreachable
It seems that direct operations on the AirPlus Card work (ie, iwconfig worked fine, dhclient showed me talking happily to the network), but things like ping and browsing that aren't specifically directed at the ath0 device fail.
Am I missing a step here? It seems that device ath0 is capable of talking to the wireless network, but as far as my laptop is concerned it has no active network interfaces.
Of particular interest is the line in "iwconfig ath0" after I've connected and obtained a DHCP lease. "Rx invalid nwid" is a huge number. Does this mean that my laptop is rejecting incoming packets from the network?
Ubuntu Hoary, Compaq Presario 2500, D-Link AirPlus DWL-G650 PCMCIA Wireless Card.
EDIT: Added actual output of commands, cleaned up post
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