Baffled by a Cable Modem, solved again

[Jim]

On 06/21/2009 01:53 PM, Don Vogt wrote:
> Date: Sun, 21 Jun 2009 11:10:21 -0400
> From: Jim<mickeyboa at sbcglobal.net>
> Subject: Re: (no subject)
> To: "Community assistance, encouragement,    and advice for using
>      Fedora."<fedora-list at redhat.com>
> Message-ID:<4A3E4D5D.6080707 at sbcglobal.net>
> Content-Type: text/plain; charset="iso-8859-1"
>
> On 06/21/2009 12:51 AM, Armin Moradi wrote:
>    
>>
>> On Sat, Jun 20, 2009 at 7:05 PM,<dnvot at yahoo.com
>> <mailto:dnvot at yahoo.com>>  wrote:
>>
>>
>>      Message: 8
>>      Date: Sat, 20 Jun 2009 10:42:14 -0400
>>      From: Mail Lists<lists at sapience.com<mailto:lists at sapience.com>>
>>      Subject: Re: Baffled by a Cable Modem
>>      To: "Community assistance, encouragement,    and advice for using
>>         Fedora."<fedora-list at redhat.com<mailto:fedora-list at redhat.com>>
>>      Message-ID:<4A3CF546.6030709 at sapience.com
>>      <mailto:4A3CF546.6030709 at sapience.com>>
>>      Content-Type: text/plain; charset=ISO-8859-1
>>
>>      On 06/20/2009 10:38 AM, Jim wrote:
>>
>>      >>  What your forgetting is the mac# from a previous device,
>>      Computer ,etc,
>>      >>  some cable modems will retain that mac # and not connect to any new
>>      >>  devices until you clear the old one.
>>      >>
>>
>>      >  I thought he had connectivity - just not to all hosts - so this
>>      sounds
>>      >like a red herring.
>>
>>      I have been trying to follow this line of trouble shooting, but it
>>      think it is above my pay grade.
>>      But I think you are right about the red-herring. I can ping any
>>      one I have tried. I think that means my DHCP and DNS are OK.
>>
>>      >Could it be DNS problem?  ... firefox caches dns ... so some cached
>>      >hosts may work
>>      That looks promising. If firefox is cacheing a bad dns, then maybe
>>      everything else would work OK except firefox. Maybe, if it cached
>>      a google dns, it would work with the google stuff, which it does,
>>      but not other sites.
>>      However, I also tried dillo, with the same unable to load result.
>>      I had an idea of how to check this. I booted the problem computer
>>      with fc9 Live-CD. (I think that gives me all clean configuration
>>      files) and I had the same problem and gmail still worked.
>>
>>      I have connected the ethernet cable out of the modem to my old
>>      computer ( fc8). I tried to boot, which went OK, except the modem
>>      wasn't found. I then  powered down the modem and the computer,
>>      then powered them both up and booted.
>>      It seems to work fine. (Maybe this computer works on saturdays)
>>      To me, it acts like hardware. Next I think I will try putting in
>>      an old NIC that I have and see what happens.
>>
>>
>>
>>      --
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>>      Guidelines:
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>>
>>
>> Could someone put a sane subject on this please?  (no subject) doesn't
>> make any sense.
>>      
>
>    
>> --
>> Armin Moradi
>>      
>
> done. I apologize . It was just dumb.
>
>    
>> If he is having problems with reaching some websites and not others it
>> is a IPV6 DNS problem in Firefox ,
>> 1. Do a about:config in Firefox URL and where it says "filter" at top
>> put this line  "network.dns.disableIPv6   user set  boolean  true"
>> W/O quotes.
>>      
>    
>> And double check down in body that it is entered correctly.
>>      
>
>    
>> 2.  In /etc make a file dhclient-eth0.conf and put in line,
>> "prepend domain-name-servers 127.0.0.1;"
>> W/o quotes
>>      
>    
>> If you have a eth1 or wlan0 , you will have to make a file for them,
>> just change the eth0 to eth1, wlan0, Etc.
>>      
> Done, and that seems to have solved it.
>   I re-configured to the motherboard eth interface, made the changes, rebooted and it seems fine. I consider it solved ( I had a thursday before when it worked for a day so I have to run a while to be sure)
>   I also put in another NIC and that worked too. So I now have two solutions.
> I thank all who helped.
> ----------------------------
>
>    
That's great.
I had the same problems when I installed FC11.
I'am attaching a file that explains the whole procedure in more detail.
If I were you I would save the file, I think a lot more people are going 
to have the same problem.
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