Re: 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
Subject: Re: (no subject)
To: "Community assistance, encouragement,and advice for using
 Fedora."
Message-ID:<4a3e4d5d.6080...@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,mailto:dn...@yahoo.com>>  wrote:


 Message: 8
 Date: Sat, 20 Jun 2009 10:42:14 -0400
 From: Mail Listsmailto:li...@sapience.com>>
 Subject: Re: Baffled by a Cable Modem
 To: "Community assistance, encouragement,and advice for using
Fedora."mailto:fedora-list@redhat.com>>
 Message-ID:<4a3cf546.6030...@sapience.com
 <mailto:4a3cf546.6030...@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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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.
1.  Q: Networking (or DNS) seems really slow and fails often (Updated 2 January 
2009)
A: If Fedora 10's networking seems slow or you get frequent network connection 
failures (when other Fedoras or other OSes were working just fine on your 
machine), then you're probably hitting this bug.

Here's how you can work around it:

   1. Open a Terminal.
   2. Become root:

  su -
   3. Make sure that the "dnsmasq" program is installed (it usually is, by 
default, in Fedora 10):

  rpm -q dnsmasq

  If that says "package dnsmasq is not installed", then you need to install 
dnsmasq, by running the following command:

  yum install dnsmasq
   4. Now, you have to find out whic

Re: Baffled by a Cable Modem, solved again

[Don Vogt]

Date: Sun, 21 Jun 2009 11:10:21 -0400
From: Jim 
Subject: Re: (no subject)
To: "Community assistance, encouragement,and advice for using
Fedora." 
Message-ID: <4a3e4d5d.6080...@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,  <mailto:dn...@yahoo.com>> wrote:
>
>
> Message: 8
> Date: Sat, 20 Jun 2009 10:42:14 -0400
> From: Mail Lists mailto:li...@sapience.com>>
> Subject: Re: Baffled by a Cable Modem
> To: "Community assistance, encouragement,and advice for using
>Fedora." mailto:fedora-list@redhat.com>>
> Message-ID: <4a3cf546.6030...@sapience.com
> <mailto:4a3cf546.6030...@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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>
>
> 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.


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Re: Baffled by a Cable Modem

[dnvot]

Sorry about the "no subject" message. I don't know how it happened (except,of 
course ,carelessness). 



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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Re: Baffled by a Cable Modem

[Patrick]

dn...@yahoo.com wrote:


it returned:
Kernel IP routing table
Destination Gateway Genmask Flags   MSS Window  irtt 
Iface
192.168.122.0   0.0.0.0 255.255.255.0   U 0 0  0 


What does " netstat -r " return?

On one of the lines, your "Gateway" should be the IP address of your router.

Patrick


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Re: Baffled by a Cable Modem

[Mikkel L. Ellertson]

Mikkel L. Ellertson wrote:
> Bruno Wolff III wrote:
>> On Thu, Jun 18, 2009 at 14:33:19 -0500,
>>   "Mikkel L. Ellertson"  wrote:
>>> You will also want to comment out the HWADDR= line, or
>>> you may get strange results.
>> It works fine for me. I like to leave that in as I have some machines with
>> multiple nics and that makes sure that they consistantly get associated
>> with the same interface.
>>
>> What problems have you seen?
>>
> From sysconfig.txt:
> 
> MACADDR=
>Set the hardware address for this device to this.
>Use of this in conjunction with HWADDR= may cause
>unintended behavior.
> 
> Mikkel
> 
I forgot to add that udev is what makes sure that the NICs are
consistently named. (70-persistent-net.rules) What HWADDR does is
make sure the interface does not come up if the MAC address is
wrong. By the time you get to bringing up the interface, the device
name is already assigned.

Mikkel
-- 

  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!



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Re: Baffled by a Cable Modem

[Mikkel L. Ellertson]

Bruno Wolff III wrote:
> On Thu, Jun 18, 2009 at 14:33:19 -0500,
>   "Mikkel L. Ellertson"  wrote:
>> Bruno Wolff III wrote:
>>> Add a line like the following to the ifcfg-eth? file (and you may need to
>>> be running the network service as I don't know if network manager uses
>>> that info):
>>>
>>> MACADDR=DE:C1:A5:51:F1:ED
>>>
>>> Except you want to use the mac address of the windows box.
>>>
>>> You'll want the windows box off the network when you try this.
>>>
>> You will also want to comment out the HWADDR= line, or
>> you may get strange results.
> 
> It works fine for me. I like to leave that in as I have some machines with
> multiple nics and that makes sure that they consistantly get associated
> with the same interface.
> 
> What problems have you seen?
> 
From sysconfig.txt:

MACADDR=
   Set the hardware address for this device to this.
   Use of this in conjunction with HWADDR= may cause
   unintended behavior.

Mikkel
-- 

  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!



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Re: Baffled by a Cable Modem

[Bruno Wolff III]

On Wed, Jun 17, 2009 at 09:57:13 -0400,
  Tom Horsley  wrote:
> On Wed, 17 Jun 2009 06:30:52 -0700
> stan wrote:
> 
> > Your ISP will often know the ip address to access the web page for the
> > modem.  That is how I found out for the surfboard.  I watched the cable
> > techs when they were doing some troubleshooting on my connection.  Give
> > your isp technical help a call and ask for the modem interface.
> 
> Or better yet, get the make and model number off the modem itself
> and google for the manual online - typically far more reliable
> than any information you get from customer service :-).

Be aware that some ISPs may have custom firmware on the device. The manuals
are nice, but you need to be careful if you try to mess with things.

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Re: Baffled by a Cable Modem

[Bruno Wolff III]

On Thu, Jun 18, 2009 at 14:33:19 -0500,
  "Mikkel L. Ellertson"  wrote:
> Bruno Wolff III wrote:
> > Add a line like the following to the ifcfg-eth? file (and you may need to
> > be running the network service as I don't know if network manager uses
> > that info):
> > 
> > MACADDR=DE:C1:A5:51:F1:ED
> > 
> > Except you want to use the mac address of the windows box.
> > 
> > You'll want the windows box off the network when you try this.
> > 
> You will also want to comment out the HWADDR= line, or
> you may get strange results.

It works fine for me. I like to leave that in as I have some machines with
multiple nics and that makes sure that they consistantly get associated
with the same interface.

What problems have you seen?

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Re: Baffled by a Cable Modem

[Mail Lists]

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.

 Could it be DNS problem?  ... firefox caches dns ... so some cached
hosts may work


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Re: Baffled by a Cable Modem

[Jim]

On 06/19/2009 09:50 PM, g wrote:

Jim wrote:

   

Will he may have no choice,
 

only as last choice.

   

until it can accept a new MAC #.
 

'mac' will be same. it is factory written and unique.

disconnecting coax input cable to modem will break his internet service
and drop his dhcp connection to provider.

disconnecting modem cable output from computer will break his dhcp
connection to cable modem. when he connects back up, he will receive
same default from cable modem.

or, pull power to cable modem.

both hdcp's reset.

no reset button. no re-setup of cable modem 'password', 'vpi', 'vci',
'atm encap', 'atm pvc', etc, whatever, needed.


   
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.


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Re: Baffled by a Cable Modem solved

[Tim]

On Fri, 2009-06-19 at 22:37 -0400, Tony Nelson wrote:
> At the bottom of your message I see that you using one machine booted
> sometimes in MSWindows and sometimes in Linux.  Even in that case is
> is /possible/ that the MAC addresses are different, as they can be
> set.

Depending on the DHCP server, they'll still see both OSs as being
sufficiently different, to not allocate them the same IP address.
There's other parameters included with the DHCP client request (such as
a uid one).  On my server, I had to hard configure one MAC to always be
given the same IP, otherwise each different OS booted got different IP
addresses, yet the reverse lookup didn't change (that stuffed quite a
few things up).

Another solution is to configure a static address into each computer,
presuming that your DHCP-assigned IP address should always be the same.

-- 
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2.6.27.24-78.2.53.fc9.i686

Don't send private replies to my address, the mailbox is ignored.  I
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Re: Baffled by a Cable Modem solved

[Tony Nelson]

On 09-06-19 02:06:38, Don Vogt wrote:
> 
> 
> 
> 
> Date: Thu, 18 Jun 2009 14:40:25 -0400
> From: Tony Nelson 
> Subject: Re: Baffled by a Cable Modem solved
> To: fedora-list@redhat.com
> Message-ID: <1245350425.1976...@localhost.localdomain>
> Content-Type: text/plain; charset=us-ascii
> 
> On 09-06-18 11:36:02, John Aldrich wrote:
> 
> > My guess... your ISP had something messed up and just waiting fixed 
> > it. :-)  Even if you called them, they probably would have denied 
> > there was anything wrong. Or, they might have admitted they had an 
> > outage or something.  You never know. :-)
> 
> 
>  I did call and when I said that it worked OK in Windows, she lost
> interest. When I said my problem was in using Linux, she didn't hang
> up
> - but her brain did. It was much as I expected since they don't claim
> to support Linux
> 
> .
> >  As others have said, you are probably only allowed one IP address 
> > issued to one MAC address, which timed out overnight, and your
> attempt 
> > to use a different MAC address worked in the morning.  If you only
> ever 
> > have one machine connected to a network, you can give them both the 
> > same MAC address, as was already suggested to you.  That won't work
> f 
> > you wish to use more than one machine on the network (and Internet)
> at 
> > the same time, in which case you should get a small home NAT box / 
> > Router and configure it to present the expected MAC address (or 
> just
> 
> > wait overnigth again).
> 
> As far as I understand it ( and I don't claim to ), I used the same
> MAC address all the time. At least I never changed it.

Each machine has its own MAC address.  At the bottom of your message I 
see that you using one machine booted sometimes in MSWindows and 
sometimes in Linux.  Even in that case is is /possible/ that the MAC 
addresses are different, as they can be set.


>  I have another computer, ( sort of a standby) that doesn't play in
> this recent activity. But I used to exchange the ethernet cable from
> the DSL modem between the two computers (rebooting each time, and had
> no problems. Of course that is a different network with different
> policies probably.

Yes.  That one probably used PPPoE, which identifies by username and 
password, not DHCP, which identifies by MAC address.

-- 

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  '  <http://www.georgeanelson.com/>

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Re: Baffled by a Cable Modem

[g]

Jim wrote:

> Will he may have no choice,

only as last choice.

> until it can accept a new MAC #.

'mac' will be same. it is factory written and unique.

disconnecting coax input cable to modem will break his internet service
and drop his dhcp connection to provider.

disconnecting modem cable output from computer will break his dhcp
connection to cable modem. when he connects back up, he will receive
same default from cable modem.

or, pull power to cable modem.

both hdcp's reset.

no reset button. no re-setup of cable modem 'password', 'vpi', 'vci',
'atm encap', 'atm pvc', etc, whatever, needed.


-- 

peace out.

tc,hago.

g
.


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**
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Re: Baffled by a Cable Modem

[Jim]

On 06/19/2009 01:38 PM, g wrote:

Jim wrote:

   

On the Cable Modem find the reset button and push on it and do a reset. This
will clear out any previous MAC addresses and it will accept new MAC numbers.
 

you failed to mention, it will/may/can/might/probably cause a reset of all
configurations.

wherein, he will need to find ip address of modem with web browser, reenter
all modem setup that is not default, including having password to access user
id setup, firewall, etc.


   
Will he may have no choice, if that cable modem has a another MAC # it 
will prevent the cable modem from connecting to his router or computer 
until it can accept a new MAC #.

I have seen that problem happen in a Comcast and At&T cable modem.
As far as connection, if he is using DHCP, the cable modem will get a 
new IP and so will his computer. All he has to be sure of is in 
resolv.conf, that the Namesever is set up properly.


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Re: Baffled by a Cable Modem

[Bill Davidsen]

Mikkel L. Ellertson wrote:

Frank Cox wrote:

On Wed, 17 Jun 2009 17:38:44 -0500
Mikkel L. Ellertson wrote:


I am not sure of the exact cause, but I have speculated that it has
a dhcp server with only one IP address in its address pool. It will
not give that IP address to another NIC until the lease expires, or
the server is restarted...

The cable company that I do some occasional tech work for has a setup where
each modem is "entitled to" a certain number of IP addresses, the entitlement
depending on the service level that's being paid for.  It won't give a modem
any more IP addresses until the modem is reset by the guys in the NOC.


Will the modem give the same IP address to another NIC after the
lease has expired, or after you power-cycle the modem? I know
power-cycling the modem works with my SpeedStream 5100. I have never
had the time to see if it will also work by letting the lease expire...

You can also manually release the lease from cli, "dhclient -r" does it. Faster 
than letting it time out.  ;-)


--
Bill Davidsen 
  "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot

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Re: Baffled by a Cable Modem solved

[Bill Davidsen]

dn...@yahoo.com wrote:
My problem is solved, at least for now. My reservation is becauser I 
don't know what I did.
 Last night I tried to be sure I had no filters interfering., I turned 
off the firewall, booted and tried firefox and dillo. Neither worked. I 
made selinux permissive, rebooted and tried dillo and firefox. Neither 
worked. I went to bed. This morning I tried Puppy Linux, and it worked 
fine. So I tried ubuntu, and that worked fine. ( I had failed with both 
of them yesterday.)  So I booted fedora and firefox -- success.

 I was baffled in the beginning, and I am more baffled now.
I thank you all for your efforts. I tried ( to the best of my abilities) 
to implement all the suggestions, but I don't believe I ever really 
changed anything permanently.

 I am OK for now, but Who knows; maybe it only works on thursdays.

On some cable/dsl boxes you get a non-routable IP from the DHCP in the box 
itself, and the external IP is not readily visible (NAT at its worst). If you 
are willing to risk another overnight outage you could connect one box, run 
ifconfig to see the MAC and IP addresses, then run the other system and do the 
same. That would let you see if the cable box cares what you are attaching.


I seem to recall that local cable boxes have four RJ45 connectors and you can 
have multiple computers on at once.


Note: if you do have an issue with the cable, you can buy a cheap WAP and then 
the cable box will always see the same MAC, DHCP in the WAP gives out IP 
addresses. I have a D-Link here, but only because it was on sale. It's been 
totally boring, I haven't changed anything in years, although I am going to 
change from WEP+VPN to WSA2 as soon as I get rid of the last laptop running a 
pre-WSA distro.


--
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  "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot

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Re: Baffled by a Cable Modem

[g]

Jim wrote:

> On the Cable Modem find the reset button and push on it and do a reset. This
> will clear out any previous MAC addresses and it will accept new MAC numbers.

you failed to mention, it will/may/can/might/probably cause a reset of all
configurations.

wherein, he will need to find ip address of modem with web browser, reenter
all modem setup that is not default, including having password to access user
id setup, firewall, etc.


-- 

peace out.

tc,hago.

g
.


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**
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**
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Re: Baffled by a Cable Modem

[Jim]

On 06/18/2009 03:33 PM, Mikkel L. Ellertson wrote:

Bruno Wolff III wrote:
   

On Wed, Jun 17, 2009 at 18:21:14 -0600,
   Frank Cox  wrote:
 

On Wed, 17 Jun 2009 18:54:02 -0500
Mikkel L. Ellertson wrote:

   

Will the modem give the same IP address to another NIC after the
lease has expired, or after you power-cycle the modem?
 

I'm not entirely sure of the answer to that.  I know that power-cycling the
modem doesn't change anything in that regard, and further than that I've never
asked about.  If I need a modem reset I just call the NOC with the serial
number on the modem, the modem lights go off for a few seconds, and when it
comes back the reset is complete.
   

If you think the mac address is the problem you should be able to test that
theory by setting the mac address of the linux box to match the windows box
and see if that gets things working.

Add a line like the following to the ifcfg-eth? file (and you may need to
be running the network service as I don't know if network manager uses
that info):

MACADDR=DE:C1:A5:51:F1:ED

Except you want to use the mac address of the windows box.

You'll want the windows box off the network when you try this.

 

You will also want to comment out the HWADDR=  line, or
you may get strange results.

Mikkel
   





On the Cable Modem find the reset button and push on it and do a reset.
This will clear out any previous MAC addresses and it will accept new MAC 
numbers.


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Re: Baffled by a Cable Modem solved

[Don Vogt]

Date: Thu, 18 Jun 2009 14:40:25 -0400
From: Tony Nelson 
Subject: Re: Baffled by a Cable Modem solved
To: fedora-list@redhat.com
Message-ID: <1245350425.1976...@localhost.localdomain>
Content-Type: text/plain; charset=us-ascii

On 09-06-18 11:36:02, John Aldrich wrote:

> My guess... your ISP had something messed up and just waiting fixed 
> it. :-)  Even if you called them, they probably would have denied 
> there was anything wrong. Or, they might have admitted they had an 
> outage or something.  You never know. :-)


 I did call and when I said that it worked OK in Windows, she lost
interest. When I said my problem was in using Linux, she didn't hang up
- but her brain did. It was much as I expected since they don't claim
to support Linux

.
>  As others have said, you are probably only allowed one IP address 
> issued to one MAC address, which timed out overnight, and your attempt 
> to use a different MAC address worked in the morning.  If you only ever 
> have one machine connected to a network, you can give them both the 
> same MAC address, as was already suggested to you.  That won't work f 
> you wish to use more than one machine on the network (and Internet) at 
> the same time, in which case you should get a small home NAT box / 
> Router and configure it to present the expected MAC address (or just 
> wait overnigth again).

As far as I understand it ( and I don't claim to ), I used the same MAC address 
all the time. At least I never changed it.

 I have another computer, ( sort of a standby) that doesn't play in
this recent activity. But I used to exchange the ethernet cable from
the DSL modem between the two computers (rebooting each time, and had
no problems. Of course that is a different network with different
policies probably. 

TonyN.:'                       <mailto:tonynel...@georgeanelson.com>
      '                              <http://www.georgeanelson.com/>






----------

Message: 2
Date: Fri, 19 Jun 2009 01:45:12 +0930
From: Tim 
Subject: Re: Baffled by a Cable Modem solved
To: "Community assistance, encouragement,    and advice for using
    Fedora." 
Message-ID: <1245341712.21824.2.ca...@suspishus.lan.cameratim.com>
Content-Type: text/plain

On Thu, 2009-06-18 at 11:36 -0400, John Aldrich wrote:
> Or, they might have admitted they had an outage or something. You 
> never know. :-)

With one of my old ISPs, anytime you mentioned you had a problem they
either said they'll look into it for you, or they thought it'd be due to
something they were working on (and they'd say what it was).  Even if
you didn't know whether it was true, they didn't piss you off.  Unlike
some other ISPs who always say there's nothing wrong at their end, and
it's all your fault...

-- 



--

>Message: 9
> Date: Thu, 18 Jun 2009 10:52:09 -0500
> From: Bruno Wolff III 
> Subject: Re: Baffled by a Cable Modem
> To: Frank Cox 
>Cc: =?ISO-8859-1?Q? Community_assistance, _encouragement,
 >    =09and_advice_for_?= =?ISO-8859-1?Q?using_Fedora.?=
 >   
> Message-ID: <20090618155209.ga31...@wolff.to>
> Content-Type: text/plain; charset=us-ascii

> On Wed, Jun 17, 2009 at 18:21:14 -0600,
> >  Frank Cox  wrote:
> > On Wed, 17 Jun 2009 18:54:02 -0500
> > Mikkel L. Ellertson wrote:
> > 
>  > > Will the modem give the same IP address to another NIC after the
> > > lease has expired, or after you power-cycle the modem?
> > 
> > I'm not entirely sure of the answer to that.  I know that power-cycling the
> > modem doesn't change anything in that regard, and further than that I've > 
> > > > never
> > asked about.  If I need a modem reset I just call the NOC with the serial
> > number on the modem, the modem lights go off for a few seconds, and
> > when it
> > comes back the reset is complete.

> If you think the mac address is the problem you should be able to test that
> theory by setting the mac address of the linux box to match the windows box
> and see if that gets things working.

> Add a line like the following to the ifcfg-eth? file (and you may need to
> be running the network service as I don't know if network manager uses
> that info):

> MACADDR=DE:C1:A5:51:F1:ED

> Except you want to use the mac address of the windows box.

> You'll want the windows box off the network when you try this.
>

I apologize for not being more clear about my setup. I only use one computer, 
which boots fedora, ubuntu, puppy, or Windows XP. When I try the cable modem I 
connect an ethernet cable from the modem to the integrated nic on the 
motherboard. Before the cable

Re: Baffled by a Cable Modem

[Mikkel L. Ellertson]

Bruno Wolff III wrote:
> On Wed, Jun 17, 2009 at 18:21:14 -0600,
>   Frank Cox  wrote:
>> On Wed, 17 Jun 2009 18:54:02 -0500
>> Mikkel L. Ellertson wrote:
>>
>>> Will the modem give the same IP address to another NIC after the
>>> lease has expired, or after you power-cycle the modem?
>> I'm not entirely sure of the answer to that.  I know that power-cycling the
>> modem doesn't change anything in that regard, and further than that I've 
>> never
>> asked about.  If I need a modem reset I just call the NOC with the serial
>> number on the modem, the modem lights go off for a few seconds, and when it
>> comes back the reset is complete.
> 
> If you think the mac address is the problem you should be able to test that
> theory by setting the mac address of the linux box to match the windows box
> and see if that gets things working.
> 
> Add a line like the following to the ifcfg-eth? file (and you may need to
> be running the network service as I don't know if network manager uses
> that info):
> 
> MACADDR=DE:C1:A5:51:F1:ED
> 
> Except you want to use the mac address of the windows box.
> 
> You'll want the windows box off the network when you try this.
> 
You will also want to comment out the HWADDR= line, or
you may get strange results.

Mikkel
-- 

  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!



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Re: Baffled by a Cable Modem solved

[Tony Nelson]

On 09-06-18 11:36:02, John Aldrich wrote:
>On Thursday 18 June 2009, dn...@yahoo.com wrote:
>> My problem is solved, at least for now. My reservation is becauser I
>> don't know what I did. Last night I tried to be sure I had no 
>> filters interfering., I turned off the firewall, booted and tried 
>> firefox and dillo. Neither worked. I made selinux permissive, 
>> rebooted and tried dillo and firefox. Neither worked. I went to bed. 
>> This morning I tried Puppy Linux, and it worked fine. So I tried 
>> ubuntu, and that worked fine. ( I had failed with both of them 
>> yesterday.)  So I booted fedora and firefox -- success. I was  
>> baffled in the beginning, and I am more baffled now.  I thank you 
>> all for your efforts. I tried ( to the best of my abilities) to 
>> implement all the suggestions, but I don't believe I ever really 
>> changed anything permanently. I am OK for now, but Who knows; maybe 
>> it only works on thursdays.
>
> My guess... your ISP had something messed up and just waiting fixed 
> it. :-)  Even if you called them, they probably would have denied 
> there was anything wrong. Or, they might have admitted they had an 
> outage or something.  You never know. :-)

As others have said, you are probably only allowed one IP address 
issued to one MAC address, which timed out overnight, and your attempt 
to use a different MAC address worked in the morning.  If you only ever 
have one machine connected to a network, you can give them both the 
same MAC address, as was already suggested to you.  That won't work f 
you wish to use more than one machine on the network (and Internet) at 
the same time, in which case you should get a small home NAT box / 
Router and configure it to present the expected MAC address (or just 
wait overnigth again).

-- 

TonyN.:'   
  '  


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Re: Baffled by a Cable Modem

[Bruno Wolff III]

On Wed, Jun 17, 2009 at 18:21:14 -0600,
  Frank Cox  wrote:
> On Wed, 17 Jun 2009 18:54:02 -0500
> Mikkel L. Ellertson wrote:
> 
> > Will the modem give the same IP address to another NIC after the
> > lease has expired, or after you power-cycle the modem?
> 
> I'm not entirely sure of the answer to that.  I know that power-cycling the
> modem doesn't change anything in that regard, and further than that I've never
> asked about.  If I need a modem reset I just call the NOC with the serial
> number on the modem, the modem lights go off for a few seconds, and when it
> comes back the reset is complete.

If you think the mac address is the problem you should be able to test that
theory by setting the mac address of the linux box to match the windows box
and see if that gets things working.

Add a line like the following to the ifcfg-eth? file (and you may need to
be running the network service as I don't know if network manager uses
that info):

MACADDR=DE:C1:A5:51:F1:ED

Except you want to use the mac address of the windows box.

You'll want the windows box off the network when you try this.

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Re: Baffled by a Cable Modem solved

[Tim]

On Thu, 2009-06-18 at 11:36 -0400, John Aldrich wrote:
> Or, they might have admitted they had an outage or something. You 
> never know. :-)

With one of my old ISPs, anytime you mentioned you had a problem they
either said they'll look into it for you, or they thought it'd be due to
something they were working on (and they'd say what it was).  Even if
you didn't know whether it was true, they didn't piss you off.  Unlike
some other ISPs who always say there's nothing wrong at their end, and
it's all your fault...

-- 
[...@localhost ~]$ uname -r
2.6.27.24-78.2.53.fc9.i686

Don't send private replies to my address, the mailbox is ignored.  I
read messages from the public lists.



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Re: Baffled by a Cable Modem solved

[John Aldrich]

On Thursday 18 June 2009, dn...@yahoo.com wrote:
> My problem is solved, at least for now. My reservation is becauser I
> don't know what I did. Last night I tried to be sure I had no filters
> interfering., I turned off the firewall, booted and tried firefox and
> dillo. Neither worked. I made selinux permissive, rebooted and tried
> dillo and firefox. Neither worked. I went to bed. This morning I tried
> Puppy Linux, and it worked fine. So I tried ubuntu, and that worked
> fine. ( I had failed with both of them yesterday.)  So I booted fedora
> and firefox -- success. I was baffled in the beginning, and I am more
> baffled now.
> I thank you all for your efforts. I tried ( to the best of my abilities)
> to implement all the suggestions, but I don't believe I ever really
> changed anything permanently. I am OK for now, but Who knows; maybe it
> only works on thursdays.>
My guess... your ISP had something messed up and just waiting fixed it. :-) 
Even if you called them, they probably would have denied there was anything 
wrong. Or, they might have admitted they had an outage or something. You 
never know. :-)

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Re: Baffled by a Cable Modem solved

[dnvot]

My problem is solved, at least for now. My reservation is becauser I don't know 
what I did.
 Last night I tried to be sure I had no filters interfering., I turned off the 
firewall, booted and tried firefox and dillo. Neither worked. I made selinux 
permissive, rebooted and tried dillo and firefox. Neither worked. I went to 
bed. This morning I tried Puppy Linux, and it worked fine. So I tried ubuntu, 
and that worked fine. ( I had failed with both of them yesterday.)  So I booted 
fedora and firefox -- success. 
 I was baffled in the beginning, and I am more baffled now.
I thank you all for your efforts. I tried ( to the best of my abilities) to 
implement all the suggestions, but I don't believe I ever really changed 
anything permanently.
 I am OK for now, but Who knows; maybe it only works on thursdays.

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Re: Baffled by a Cable Modem

[Frank Cox]

On Wed, 17 Jun 2009 18:54:02 -0500
Mikkel L. Ellertson wrote:

> Will the modem give the same IP address to another NIC after the
> lease has expired, or after you power-cycle the modem?

I'm not entirely sure of the answer to that.  I know that power-cycling the
modem doesn't change anything in that regard, and further than that I've never
asked about.  If I need a modem reset I just call the NOC with the serial
number on the modem, the modem lights go off for a few seconds, and when it
comes back the reset is complete.

The company supplies all of the modems for the customers as part of the
service (and you have to turn it in if you cancel the service, of course) and
the whole thing is centrally controlled, just like their digital cable TV boxes.

-- 
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Re: Baffled by a Cable Modem

[Mikkel L. Ellertson]

Frank Cox wrote:
> On Wed, 17 Jun 2009 17:38:44 -0500
> Mikkel L. Ellertson wrote:
> 
>> I am not sure of the exact cause, but I have speculated that it has
>> a dhcp server with only one IP address in its address pool. It will
>> not give that IP address to another NIC until the lease expires, or
>> the server is restarted...
> 
> The cable company that I do some occasional tech work for has a setup where
> each modem is "entitled to" a certain number of IP addresses, the entitlement
> depending on the service level that's being paid for.  It won't give a modem
> any more IP addresses until the modem is reset by the guys in the NOC.
> 
Will the modem give the same IP address to another NIC after the
lease has expired, or after you power-cycle the modem? I know
power-cycling the modem works with my SpeedStream 5100. I have never
had the time to see if it will also work by letting the lease expire...

Mikkel
-- 

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for thou art crunchy and taste good with Ketchup!



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Re: Baffled by a Cable Modem

[Frank Cox]

On Wed, 17 Jun 2009 17:38:44 -0500
Mikkel L. Ellertson wrote:

> I am not sure of the exact cause, but I have speculated that it has
> a dhcp server with only one IP address in its address pool. It will
> not give that IP address to another NIC until the lease expires, or
> the server is restarted...

The cable company that I do some occasional tech work for has a setup where
each modem is "entitled to" a certain number of IP addresses, the entitlement
depending on the service level that's being paid for.  It won't give a modem
any more IP addresses until the modem is reset by the guys in the NOC.

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Re: Baffled by a Cable Modem

[Fernando Cassia]

On Wed, Jun 17, 2009 at 10:07 AM,  wrote:
> I suspect the
> modem maker did something odd in the driver and furnished it to Microsoft
> and won't release it now. I saw that the USBnet programmers do not have a
> driver for this modem.
>  How can it work OK with google and have a configuration problem in my
> setup?

You're tripping on your own shoelaces. You said a few messages ago
that your cable modem was connected through Ethernet. So what does USB
have to do with your setup? Nothing.

FC

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Re: Baffled by a Cable Modem

[Mikkel L. Ellertson]

Tom Horsley wrote:
> On Wed, 17 Jun 2009 14:07:49 -0700
> stan wrote:
> 
>> So it should look the same from both windows and linux
> 
> Wait! Are you dual booting windows and linux, or swapping the
> modem between two different computers? Vast numbers
> of cable companies register the MAC address of the interface
> they are first connected to and refuse to talk to other
> NIC cards without calling up the cable company and getting
> things reset.
> 
> That's one of the reasons that the MAC spoofing virtually
> all routers have is so useful. You can fool with your hardware
> without talking to the cable company.
> 
Even if they do not register the MAC address with the cable company,
the modem remembers it. You can reset it my powering down the modem,
waiting 10-30 seconds, and powering it back up.

I am not sure of the exact cause, but I have speculated that it has
a dhcp server with only one IP address in its address pool. It will
not give that IP address to another NIC until the lease expires, or
the server is restarted...

Mikkel
-- 

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for thou art crunchy and taste good with Ketchup!



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Re: Baffled by a Cable Modem

[Tom Horsley]

On Wed, 17 Jun 2009 14:07:49 -0700
stan wrote:

> So it should look the same from both windows and linux

Wait! Are you dual booting windows and linux, or swapping the
modem between two different computers? Vast numbers
of cable companies register the MAC address of the interface
they are first connected to and refuse to talk to other
NIC cards without calling up the cable company and getting
things reset.

That's one of the reasons that the MAC spoofing virtually
all routers have is so useful. You can fool with your hardware
without talking to the cable company.

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Re: Baffled by a Cable Modem

[stan]

On Wed, 17 Jun 2009 12:04:30 -0700 (PDT)
dn...@yahoo.com wrote:

> > > their default:
> > 
> > >Β Β Β Β  192.168.0.1
> > >Β Β Β  192.168.0.254
> > >Β Β Β  192.168.1.1
> > >Β Β Β  192.168.1.254
> > 
> > tried all of those with no luck
> 
> > I didn't see the start of this thread, but I have a motorola
> > surfboard cable modem and the gui interface is 192.168.100.1.
> 
> That worked fior the next step. I had to boot into Windows XP to get
> the interface. It had a little info (  MAC and voltages and such) and
> three buttons. When ipushed them it said " This feature hasn't been
> implemented . Contact your ISP." When I put that IP into Firefox on
> linux, It identifies it as "Scientific Atlanta Cable Modem" in linux
> so it must be getting some info through . All it returns though is
> the outline of a box and a blank screen, and it says "transferring
> data from 192.168.100.1"
> 
> an I guess that all means Linux is not connected properly to the
> modem.

I think you are right.  This is just an internally generated web page
from the modem.  If you can 'see' it from your OS, it just gives it to
you.  So it should look the same from both windows and linux, and the
information should be identical (well, except for the signal numbers,
which change with temperature and load and circuit condition).

If you can get into the modem in windows, can you verify that it is set
correctly to dhcp mode if there is nothing between it and your
computer, or bridging mode if there is a router between it and your
computer.  It's been so long since I set up the surfboard, I've
forgotten what I actually did.  After I initially set it up, it just
worked.

Can you access the web via the modem in windows?  If so, the problem is
just a configuration issue in linux.  Rick's advice about looking at
what the modem is offering is a good one.  Check the network parameters
it has under windows, write them down, and see if you can put them in
in linux.

Do you have any kind of filters on your linux connections?  That is,
are you blocking any addresses.  How about firefox?  Is it blocking any
addresses?  Do you have proxies in the loop?  Is your firewall set to
pass this IP?  All of these should be OK, but just checking.


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Re: Baffled by a Cable Modem

[dnvot]

> > their default:
> 
> >Β Β Β Β  192.168.0.1
> >Β Β Β  192.168.0.254
> >Β Β Β  192.168.1.1
> >Β Β Β  192.168.1.254
> 
> tried all of those with no luck

> I didn't see the start of this thread, but I have a motorola surfboard
> cable modem and the gui interface is 192.168.100.1.

That worked fior the next step. I had to boot into Windows XP to get the 
interface.
It had a little info (  MAC and voltages and such) and three buttons. When 
ipushed them it said " This feature hasn't been implemented . Contact your ISP."
 When I put that IP into Firefox on linux, It identifies it as "Scientific 
Atlanta Cable Modem" in linux  so it must be getting some info
 through . All it returns though is the outline of a box and a blank screen, 
and it says "transferring data from 192.168.100.1"

an I guess that all means Linux is not connected properly to the modem.
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Re: Baffled by a Cable Modem

[g]

Rick Stevens wrote:

> Using FireFox, see if you can get to the cable modem's GUI interface.
> Most of them will have one of the following four IPs as their default:
> 
>   192.168.0.1
>   192.168.0.254
>   192.168.1.1
>   192.168.1.254

also, try 192.168.10.1, 192.168.10.254, 192.168.100.1, 192.168.100.254.

> This puts your computer on the class B (CIDR /16) network of 192.168.0.0

!not!

see;

http://tools.ietf.org/html/rfc4632

read page 5, paragraph 1.


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Re: Baffled by a Cable Modem

[Tom Killian]

>Date: Wed, 17 Jun 2009 06:07:42 -0700 (PDT)
>From: dn...@yahoo.com
...
>I am still stuck. I seem to have a dedicated Google machine.

You could run wireshark (or tcpdump) and see what's happening to the
failed TCP connections.

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Re: Baffled by a Cable Modem

[Tom Horsley]

On Wed, 17 Jun 2009 06:30:52 -0700
stan wrote:

> Your ISP will often know the ip address to access the web page for the
> modem.  That is how I found out for the surfboard.  I watched the cable
> techs when they were doing some troubleshooting on my connection.  Give
> your isp technical help a call and ask for the modem interface.

Or better yet, get the make and model number off the modem itself
and google for the manual online - typically far more reliable
than any information you get from customer service :-).

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Re: Baffled by a Cable Modem

[stan]

On Wed, 17 Jun 2009 06:07:42 -0700 (PDT)
dn...@yahoo.com wrote:

> > their default:
> 
> > 192.168.0.1
> >    192.168.0.254
> >    192.168.1.1
> >    192.168.1.254
> 
> tried all of those with no luck

I didn't see the start of this thread, but I have a motorola surfboard
cable modem and the gui interface is 192.168.100.1.

> > check the manual for the modem and see what the default LAN IP is.
> > Make sure you get the LAN IP, _NOT_ the WAN IP (anything on the WAN
> > side is the cable company's side of the connection).
> 
> tried all the above, with no luck. The manual does not mention a "LAN
> IP" that I can find. It does not mention a GUI.
> 
Your ISP will often know the ip address to access the web page for the
modem.  That is how I found out for the surfboard.  I watched the cable
techs when they were doing some troubleshooting on my connection.  Give
your isp technical help a call and ask for the modem interface.

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Re: Baffled by a Cable Modem

[dnvot]

Here is a continuation of my efforts. I really appreciate the help.



>Patrick wrote:
> Did you try another browser to see if it works with the other sites?

I installed and tried Dillo. It said "Query sent Waiting for reply"



> Rick Stevens wrote

> Here's one way to troubleshoot it:

> Using FireFox, see if you can get to the cable modem's GUI interface.
> Most of them will have one of the following four IPs as their default:

> 192.168.0.1
>    192.168.0.254
>    192.168.1.1
>    192.168.1.254

tried all of those with no luck

> The first thing you should do is make sure your NIC can access all of
> those addresses without using a gateway.  As root in
 a console:

>    ifconfig eth0 192.168.0.128 netmask 255.255.0.0

>  This puts your computer on the class B (CIDR /16) network of 192.168.0.0
> and you should be able to hit any of the above four addresses directly
> (in fact, any IP from 192.168.0.1 through 192.168.255.254).

>Next, try "http://192.168.0.1"; and see if you get the modem's GUI.  If
> you don't, try the other three IPs above.  If it's none of those, check
> the manual for the modem and see what the default LAN IP is.  Make sure
> you get the LAN IP, _NOT_ the WAN IP (anything on the WAN side is the
> cable company's side of the connection).

tried all the above, with no luck. The manual does not mention a "LAN IP" that 
I can find. It does not mention a GUI.

> If you can browse the IP, then you know that at least your machine and
> your modem can communicate.  Wander
 through the modem's user interface
> looking for its DHCP server settings.  Make sure the DHCP server is
> enabled and take note of which addresses it will offer (usually called
> the "pool").


> At this point, you should be able to have the modem give you an IP.
>Make sure your system is set up to fetch an IP address via DHCP and
> either reboot your system, restart NetworkManager (if you use it):

> service NetworkManager restart


> Once that's all done, again as root in a console, do:

>    ifconfig eth0

> and verify it has an IP address that's in the range described by the
> pool data you got before.  If that's all good, do:
>   netstat -rn

It returned "Forwarding is ON or its state is unknown (5). OK, No RDISC.
Missing IP address argument."



it returned:
Kernel IP
 routing table
Destination Gateway Genmask Flags   MSS Window  irtt Iface
192.168.122.0   0.0.0.0 255.255.255.0   U 0 0  0 virbr0

> and verify that the line that contains the flags "UG" is the same
> IP as the cable modem.  Example:

> 0.0.0.0   192.168.1.254   0.0.0.0    UG  0 0    0 eth0
>  ^
>  IP of cable modem

> If all that checks out, then you SHOULD
 have a live connection to the
> Internet.  The last thing to check is your /etc/resolv.conf file and
> ensure that the "nameserver" lines have legitimate IP addresses for
> live DNS servers.  This should be set up when the DHCP server gives you
> the IP address and default route, but not always.  If it doesn't set
> this up, you could manually add entries.  Here's a couple of entries you
> can use:

>    nameserver 208.67.222.222
>    nameserver 208.67.220.220

 I tried adding those to the top of the list of nameservers,  and restarted 
firefox - no change . I then rebooted and they sre gone from resolv.conf again.

Hope that helps a bit.
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 Engineer  ri...@nerd.com -
- AIM/Skype: therps2    ICQ: 22643734    Yahoo: origrps2 -
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--


I am still
 stuck. I seem to have a dedicated Google machine. I can check my mail at 
gmail.com, including loading messages ( I haven't tried to send one yet) The 
google search in Firefox works fine. GoogleEarth wiorks well -- and I still 
can't reach any other sites: And it all works fairly well in Windows XP ( it is 
still Windows!  winipcfg doesn't work. There is a screwed up .dll, apparently )
It seems to me that it might be in the nameserver somewhere. I suspect the 
modem maker did something odd in the driver and furnished it to Microsoft and 
won't release it now. I saw that the USBnet programmers do not have a driver 
for this modem.
 How can it work OK with google and have a configuration problem in my setup?

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Re: Baffled by a Cable Modem

[dnvot]

-
 Send fedora-list mailing list submissions to
    fedora-list@redhat.com

    --

    Message: 4
    Date: Tue, 16 Jun 2009 12:16:46 -0600
    From: Frank Cox 
    Subject: Re: Baffled by a Cable Modem
    To: dn...@yahoo.com, "=?ISO-8859-1?Q? Community_assistance,
    _encouragement, ?= and advice for using Fedora.  "
    
    Cc: dn...@yahoo.com
    Message-ID: <20090616121646.2b392da2.thea...@sasktel.net>
    Content-Type: text/plain; charset=ISO-8859-1

    On Tue, 16 Jun 2009 10:50:01 -0700 (PDT)
    dn...@yahoo.com wrote:

    >  Can anyone give me a clew on where to start?

   > Do you have this modem hooked up with USB or ethernet?

    It is hooked to an ethernet port on my motherboard (sis190)


   > What is the content of /etc/resolv.conf


    # Generated by NetworkManager
domain dc.dc.cox.net
search dc.dc.cox.net
nameserver 68.105.28.11
nameserver 68.105.29.11
nameserver 68.105.28.12

>    Can you ping something?  Try "ping google.com".  If that doesn't work, try
    "ping 74.125.45.100"


   PING google.com (74.125.45.100) 56(84) bytes of data.
64 bytes from yx-in-f100.google.com (74.125.45.100): icmp_seq=1 ttl=56 
time=32.0 ms
64 bytes from yx-in-f100.google.com (74.125.45.100): icmp_seq=2 ttl=56 
time=27.7 ms

   >> What is the output of the "route" command?

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref    Use Iface
192.168.122.0   *   255.255.255.0   U 0  0    0 virbr0
98.169.152.0    *   255.255.248.0   U 1  0    0 eth0
default ip98-169-152-1. 0.0.0.0 UG    0  0    0 eth0
    



    >What files do you have in your /etc/sysconfig/networking/devices directory.
    >Post them here.
    
 ifcfg-eth0
   
  # Silicon Integrated Systems [SiS] 190 Gigabit Ethernet Adapter
DEVICE=eth0
HWADDR=00:1e:90:e1:05:40
ONBOOT=no

Here is another thing that might help

eth0  Link encap:Ethernet  HWaddr 00:1E:90:E1:05:40  
  inet addr:98.169.155.38  Bcast:98.169.159.255  Mask:255.255.248.0
  inet6 addr: fe80::21e:90ff:fee1:540/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:10756 errors:29 dropped:0 overruns:0 frame:29
  TX packets:125 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000 
  RX bytes:780151 (761.8 KiB)  TX bytes:14868 (14.5 KiB)
  Interrupt:19 Base address:0xdead 


    After answering these questions we'll be in a better position to help you.

    -- 
    MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com

I looked at these before and tried to compare them when running the verizon dsl 
network.
Hopefully you can see problems.

    -
    Message: 6
    Date: Tue, 16 Jun 2009 15:25:13 -0300
    From: Fernando Cassia 
    Subject: Re: Baffled by a Cable Modem
    To: dn...@yahoo.com, "Community assistance, encouragement,    and advice
    for using Fedora." 
    Message-ID:
    <52733fad0906161125t6a4e6e4jad1a8bc398c9c...@mail.gmail.com>
    Content-Type: text/plain; charset=ISO-8859-1

    On Tue, Jun 16, 2009 at 2:50 PM,  wrote:

    >
   > Two things come to mind: MTU size, and Mac address. You could also try
   > using a fixed IP address instead of DHCP to eliminate another layer of
   > trouble.
 
The MTU is 1500 -see ifconfig above. Is that OK? It is the same as on the 
Verizon set-up
    
   >Do you have the cable modem's IP address as the default router? That's
    >all you need, often.
  I don't think I do - and I don't know how to do it. Wouldn't the IP change on 
a DHCP boot? Thanks for the input. Sorry if I am a little dumb about this stuff.
    FC



    --


    Date: Tue, 16 Jun 2009 14:44:04 -0400
    From: Tom Killian 
    Subject: Re: Baffled by a Cable Modem
    To: fedora-list@redhat.com
    Message-ID:
    
    Content-Type: text/plain; charset=ISO-8859-1

   

   > Check the MTU.  The default is 1500 bytes, but some providers use a
   > smaller value (e.g., on a DSL connection running PPPoE, the MTU is
    > 1492 bytes).  If the interface MTU is set to a value smaller than 1500
   > (left over from a DSL configuration?), packets from the cable modem
   > are probably being lost.
 thanks. It seems OK.


    --






    
    From: "Mike Burger" 
    Subject: Re: Baffled by a Cable Modem
    To: dn...@yahoo.com, "Community assistance, encouragement,    and advice
    for using Fedora." 
    
    

    > It sounds, to me, like you're connecting from your PC to the DSL modem,
    > and attempting to connect using PPOE software.
   I did a lsmod and saw nothing about ppoe, I also did a search of 
/var/log/messages for ppoe wi

Re: Baffled by a Cable Modem

[Rick Stevens]

Patrick wrote:

Did you try another browser to see if it works with the other sites?


Here's one way to troubleshoot it:

Using FireFox, see if you can get to the cable modem's GUI interface.
Most of them will have one of the following four IPs as their default:

192.168.0.1
192.168.0.254
192.168.1.1
192.168.1.254

The first thing you should do is make sure your NIC can access all of
those addresses without using a gateway.  As root in a console:

ifconfig eth0 192.168.0.128 netmask 255.255.0.0

This puts your computer on the class B (CIDR /16) network of 192.168.0.0
and you should be able to hit any of the above four addresses directly
(in fact, any IP from 192.168.0.1 through 192.168.255.254).

Next, try "http://192.168.0.1"; and see if you get the modem's GUI.  If
you don't, try the other three IPs above.  If it's none of those, check
the manual for the modem and see what the default LAN IP is.  Make sure
you get the LAN IP, _NOT_ the WAN IP (anything on the WAN side is the
cable company's side of the connection).

If you can browse the IP, then you know that at least your machine and
your modem can communicate.  Wander through the modem's user interface
looking for its DHCP server settings.  Make sure the DHCP server is 
enabled and take note of which addresses it will offer (usually called

the "pool").

At this point, you should be able to have the modem give you an IP.
Make sure your system is set up to fetch an IP address via DHCP and
either reboot your system, restart NetworkManager (if you use it):

service NetworkManager restart

or restart the non-NM service:

service network restart

Once that's all done, again as root in a console, do:

ifconfig eth0

and verify it has an IP address that's in the range described by the
pool data you got before.  If that's all good, do:

netstat -rn

and verify that the line that contains the flags "UG" is the same
IP as the cable modem.  Example:

0.0.0.0   192.168.1.254   0.0.0.0UG  0 00 eth0
  ^
  IP of cable modem

If all that checks out, then you SHOULD have a live connection to the
Internet.  The last thing to check is your /etc/resolv.conf file and
ensure that the "nameserver" lines have legitimate IP addresses for
live DNS servers.  This should be set up when the DHCP server gives you
the IP address and default route, but not always.  If it doesn't set
this up, you could manually add entries.  Here's a couple of entries you
can use:

nameserver 208.67.222.222
nameserver 208.67.220.220

Hope that helps a bit.
--
- Rick Stevens, Systems Engineer  ri...@nerd.com -
- AIM/Skype: therps2ICQ: 22643734Yahoo: origrps2 -
--
- Microsoft Windows:  Proof that P.T. Barnum was right   -
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Re: Baffled by a Cable Modem

[Patrick]

Did you try another browser to see if it works with the other sites?

Patrick

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Re: Baffled by a Cable Modem

[Mike Burger]

> I have been using Verizon DSL as my Internet connection for several years
> with no problems. I decided to upgrade my connection from .768 to 3 megs.
> after about three weeks multiple phone calls , two different modems,
> technician visit, line work and hours on the phone, I am now down to .6
> MB/sec. and the technician can't come again for another week. I will be
> just short of a month getting an upgrade.
>  I therfore decided to try Cox Cable high speed internet. I signed up ,
> installed the modem and went through the activation process in Windows
> XP.all right. When I try Linux/Firefox, I get a situation that is
> completly baffling to me. Most of the URLs I try result in firefox hanging
> at "loading" However Gmail works fine. I tried Cox support and they are
> very good at confirming that my hardware in windows is good, but they
> don't speak Linux.. I tried to look at the configuration values but
> couldn't see anything suspicious. If a config value is wrong I would
> expect that i wouldn't get Gmail.
>  Can anyone give me a clew on where to start? I tried google, but couldn't
> see anything
>  helpful. I did see one message that said the modem I have is "not
> compatible with Linux." although most of the talk was about a USB
> connection and I have ethernet. the modem is a Scientific Atlanta 2100.
> This may be off topic and I would apreciate redirection to a better group.
> I looked but didn't see one.

It sounds, to me, like you're connecting from your PC to the DSL modem,
and attempting to connect using PPOE software.

You may be better off using a router, instead...let it handle all the
authentication and negotiation, and just let your PC connect through the
router, and do what it does.
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Re: Baffled by a Cable Modem

[Tom Killian]

> Date: Tue, 16 Jun 2009 10:50:01 -0700 (PDT)
> From: dn...@yahoo.com
...
> Most of the URLs I try result in firefox hanging at "loading" However Gmail 
> works fine. I tried Cox support and they are very good at confirming that my 
> hardware in windows is good, but they don't speak Linux.. I tried to look at 
> the configuration values but couldn't see anything suspicious. If a config 
> value is wrong I would expect that i wouldn't get Gmail.
>  Can anyone give me a clew on where to start? I tried google, but couldn't 
> see anything

Check the MTU.  The default is 1500 bytes, but some providers use a
smaller value (e.g., on a DSL connection running PPPoE, the MTU is
1492 bytes).  If the interface MTU is set to a value smaller than 1500
(left over from a DSL configuration?), packets from the cable modem
are probably being lost.

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Re: Baffled by a Cable Modem

[Fernando Cassia]

On Tue, Jun 16, 2009 at 2:50 PM,  wrote:

> baffling to me. Most of the URLs I try result in firefox hanging at
> "loading" However Gmail works fine.

If GMail works then your connection works, period. The problem is
elsewhere in your software config.
"half-working" is not an option in the networking world. Either the
packets travel down the wire or they do not.

> see anything helpful. I did see one message that said the modem I have is
> "not compatible with Linux." although most of the talk was about a USB
> connection and I have ethernet.

If you have Ethernet, then no drivers are needed. Ethernet is
ethernet, I mean a standard, no matter if the device is a wireless
router, a wired one, a cablemodem or a DSL. For all the computer
cares, it's talking to a network device, using standard ethernet and
tcpip.

Two things come to mind: MTU size, and Mac address. You could also try
using a fixed IP address instead of DHCP to eliminate another layer of
trouble.

Do you have the cable modem's IP address as the default router? That's
all you need, often.

FC

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Re: Baffled by a Cable Modem

[Frank Cox]

On Tue, 16 Jun 2009 10:50:01 -0700 (PDT)
dn...@yahoo.com wrote:

>  Can anyone give me a clew on where to start?

Do you have this modem hooked up with USB or ethernet?

What is the content of /etc/resolv.conf

Can you ping something?  Try "ping google.com".  If that doesn't work, try
"ping 74.125.45.100"

What is the output of the "route" command?

What files do you have in your /etc/sysconfig/networking/devices directory.
Post them here.

After answering these questions we'll be in a better position to help you.

-- 
MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com

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Baffled by a Cable Modem

[dnvot]

I have been using Verizon DSL as my Internet connection for several years with 
no problems. I decided to upgrade my connection from .768 to 3 megs. after 
about three weeks multiple phone calls , two different modems, technician 
visit, line work and hours on the phone, I am now down to .6 MB/sec. and the 
technician can't come again for another week. I will be just short of a month 
getting an upgrade.
 I therfore decided to try Cox Cable high speed internet. I signed up , 
installed the modem and went through the activation process in Windows XP.all 
right. When I try Linux/Firefox, I get a situation that is completly baffling 
to me. Most of the URLs I try result in firefox hanging at "loading" However 
Gmail works fine. I tried Cox support and they are very good at confirming that 
my hardware in windows is good, but they don't speak Linux.. I tried to look at 
the configuration values but couldn't see anything suspicious. If a config 
value is wrong I would expect that i wouldn't get Gmail.
 Can anyone give me a clew on where to start? I tried google, but couldn't see 
anything
 helpful. I did see one message that said the modem I have is "not compatible 
with Linux." although most of the talk was about a USB connection and I have 
ethernet. the modem is a Scientific Atlanta 2100.
This may be off topic and I would apreciate redirection to a better group. I 
looked but didn't see one.
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