Ubuntu

Difficulty connecting to the net through a wireless network

Asked by James Gillum

Hi there,

I'm completely new to Ubuntu, and know little about computers in general, i posted this in the forum at the weekend, but on one was able to help me, i've since had a good look on the net to see if i can help myself, but i've found nothing of use.

Here's my setup

PC - running Ubuntu Dapper-->
Wireless network card (Belkin 54g) -supported by Ubuntu as native, and working fine -->
Wireless Router (Belkin 54g) - i'm guessing the connection between card and router is also fine, as i can see my windows network when i go onto network places on my Ubuntu PC. -->
NTL 250 cable modem (i have run a programme called pppoeconfig, but this just gave up an error message - it didn't find the modem)

My problem is that i can't use the internet on my Ubuntu computer.

I have checked all the DNS IP etc settings, and am pretty sure they are OK, although i know little about these. The problem seems to be just that last step getting on to the net.

Ubuntu is otherwise working great, and i don't want to have to go back to XP.

Please help, any thoughts will be much appreciated.

PS i know i might not have included all the info you need here, but i'll do my best to answer any questions that would help.

Thanks

James

Question information

Language:
English Edit question
Status:
Answered
For:
Ubuntu Edit question
Assignee:
No assignee Edit question
Last query:
Last reply:
Revision history for this message
Jonathan Anderson (jonathan-anderson) said : 		#1

In order to help diagnose your problem, let's get a little more information.

First, open up a shell (open Terminal in GNOME or Konsole in KDE). Then, give us the output that you get from running 1) "iwconfig", 2) "ifconfig" and 3) "route".

iwconfig is used to configure (or get information about) wireless networks. Everything here is probably normal (since you can see the Windows network), but it doesn't hurt to be thorough.

ifconfig is used to configure (or get information about) the actual network settings (IP address, etc.). Again, this is probably normal.

Where I suspect the trouble may lie is in the kernel routing table (which tells Linux how to find computers in other networks, e.g., across the Internet). The "route" command will tell us about this.

Finally, just to be sure, the other machines on your network *are* able to use the 'Net, right?

Revision history for this message
James Gillum (j-g-softhome) said : 		#2

Thanks for getting back to me, i really appreciate the help.
Here is the info you requested.

Iwconfig

Lo no wireless connections

Ra0 RT2500 Wireless ESSID: “Belkin 54g”
Mode: Managed Frequency=2.462 GHZ Access point 00:11:50:53:14:C6
Bit Rate 54 MB/s
RTS thr:off Fragment thr:off
Encryption Key – Gives correct WEP key here Security mode: open
Link Quality= 64/100 Signal level -71dBm Noise level: -192 dBm
Rx invalid nwid:0 Rx invlid crypt: 0 Rx invalid Frag:0
Tx excessive retries: 0 Invalid misc:0 Missed beacon:0

Sit0 no wireless extensions

Ifconfig

Gave an output for lo, but I have not included it here, as I am copying all info over by hand. Will include it if it is of use though.

Ra0 Link encap:Ethernet HWaddr 00:11:50:a8:C5:A3
Inet addr: 192.168.2.1 Bcast 192.168.2.255 Mask:255.255.255.0
Inet6 addr: fe80::211:50ff:fea8:c5a3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets: 34 errors:0 dropped:0 overruns:0 frame:0
TX packets: 273 errors:0 dropped:0 overruns:0 carrier:0
Collisions:23 txqueelen:1000
RX bytes:2528 (2.4 BiB) TX bytes:9348 (9.1 KiB)
Interupt:11 Base address:0x8000

Route

IP routing kernel table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.2.0 * 255.255.255.0 U 0 0 0 ra0
Default 192.168.2.1 0.0.0.0 U.G 0 0 0 ra0

I think Lo might be my modem, but this is obsolete as I do not have a dial up connection.

Hope this info helps

Thanks again for your time and help.

James

Revision history for this message
Susan Cragin (susancragin) said : 		#3

Same problem. Had no trouble connecting under Dapper but now with the most updated Edgy I'm tearing my hair out.

susan@susan:~$ iwconfig
lo no wireless extensions.

eth1 IEEE 802.11b/g ESSID:off/any Nickname:"Broadcom 4318"
          Mode:Managed Access Point: Invalid
          RTS thr:off Fragment thr:off
          Link Quality:0 Signal level:0 Noise level:0
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

eth0 no wireless extensions.

eth2 IEEE 802.11b/g ESSID:off/any Nickname:"Broadcom 4318"
          Mode:Managed Access Point: Invalid
          RTS thr:off Fragment thr:off
          Link Quality:0 Signal level:0 Noise level:0
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

sit0 no wireless extensions.

susan@susan:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:C0:9F:A7:0A:2A
          inet addr:192.168.1.45 Bcast:255.255.255.255 Mask:255.255.255.0
          inet6 addr: fe80::2c0:9fff:fea7:a2a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:332070 errors:0 dropped:0 overruns:0 frame:0
          TX packets:186311 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:498817494 (475.7 MiB) TX bytes:13520651 (12.8 MiB)
          Interrupt:233

lo Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:100 (100.0 b) TX bytes:100 (100.0 b)

susan@susan:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
default dslrouter 0.0.0.0 UG 0 0 0 eth0
susan@susan:~$

Revision history for this message
James Gillum (j-g-softhome) said : 		#4

Would it be to do with my modem? do i need to install a driver for it?

Revision history for this message
Max Randor (max-randor) said : 		#5

lo is the local loopback and so is not to do with the network.
to copy from the terminal do ctrl+shift+C
I found the documents on the community wiki useful:
https://help.ubuntu.com/community/WifiDocs/WirelessNetworking
https://help.ubuntu.com/community/WifiDocs/WirelessTroubleShootingGuide
this may also be useful: http://www.debianadmin.com/enable-wpa-wireless-access-point-in-ubuntu-linux.html

I hope that helps.

Can you help with this problem?

Provide an answer of your own, or ask James Gillum for more information if necessary.

To post a message you must log in.