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I have the most recent Ubuntu 12.04. I can access the Internet by cable anywhere, and I can access a neighbor's Internet connection wirelessly, but I cannot access my own internet wirelessly. It shows up as having an "excellent" signal, but it the actual Internet does not show up. Firefox tells me that I am experiencing an Internet connectivity issue. I am running a dual-boot with Win7, and it all works fine there: no such problem. What do I do?

ifconfig command gives: 

thomas@ubuntu:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr f0:bf:97:05:e0:c9  
          inet addr:192.168.100.70  Bcast:192.168.100.255  Mask:255.255.255.0
          inet6 addr: fe80::f2bf:97ff:fe05:e0c9/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8504 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5598 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:6428089 (6.4 MB)  TX bytes:828736 (828.7 KB)
          Interrupt:41 Base address:0x6000 

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:1591 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1591 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:228648 (228.6 KB)  TX bytes:228648 (228.6 KB)
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try connecting to the wireless network and run the following command in the terminal: ifconfig what output do you get? Also, what security is your wireless router using? WEP, WPA2 or no encryption? – jackweirdy May 12 '12 at 19:40
WPA2. How do I copy and paste what I get for ifconfig? – Mockatt May 12 '12 at 19:42
Try restarting the wireless router; also check that the password you've entered is correct. – jackweirdy May 12 '12 at 19:49
How did you configure your router: Did you activate a MAC filter? – Jakob May 12 '12 at 20:11
I don't know what a MAC filter is, unfortunately. I'm no expert. I restarted the router and verified my password. – Mockatt May 13 '12 at 12:11

1 Answer

up vote 0 down vote

Look at:

WifiDocs/WirelessTroubleShootingGuide

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