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I installed Ubuntu 10.04. Firefox will not access the internet. It works fine in 10.04.

This happens every time Firefox opens. Do I have to update the kernel, is there another way?

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That doesn't make sense. Firefox can't access the internet and it "works fine in 10.04"? What do you mean by that? Do other services have access to the internet in your Ubuntu installation? Have you checked whether you modified Firefox's default settings? – slhck May 18 '12 at 18:40

No you don't have to update the Linux kernel.

You have to identify the cause of the problem, typically this involves looking for error messages and describing the exact symptoms.

There are diagnostic tools you can use in a command-prompt window. For example.

  sudo ifconfig
  netstat -nr

You may need to install traceroute using

  sudo apt-get install traceroute

Here's relevant extractts of what those commands produce on a working system

$ sudo ifconfig
eth0      Link encap:Ethernet  HWaddr 00:ff:19:60:1a:00
          inet addr:  Bcast:  Mask:

$ netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface   U         0 0          0 eth0         UG        0 0          0 eth0

$ host is an alias for has address has address has address has address has address has address

$ ping -c 5
PING ( 56(84) bytes of data.

--- ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4000ms

Oops - OK Google block ping, that's OK

$ wget
--2012-05-18 15:59:51--
Resolving,,, ...
Connecting to||:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: `index.html'

    [ <=>                                   ] 12,013      --.-K/s   in 0.02s

2012-05-18 15:59:52 (587 KB/s) - `index.html' saved [12013]
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wow, it's ok. I will try it now, thank's guys – Ishak Firdaus May 18 '12 at 23:05

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