Subject: Re: Network problems; no name lookups, no real connection?
To: der Mouse <mouse@Rodents.Montreal.QC.CA>
From: Jan Danielsson <>
List: tech-net
Date: 02/02/2006 15:56:35
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der Mouse wrote:
>> As I stated earlier, A and B and physically next to each other, and
>> they share the same cable modem, the same dhcp, same isp, etc.  I
>> tried disabling the firewall, but that didn't change anything.
> Some "high speed Internet" setups don't work for more than one machine
> at a time.  Typically, they are willing to talk with only one MAC
> address, needing to be reset to change to another.

   This should not be the problem, afaik. It has worked before (I should
have mentioned this in my first post), and I have heard nothing about
them changing their EULA to the opposite.

   I have been told that this particular ISP has allowed each user to
have up to five (public) ip addresses. I guess I should look into if
that has changed.

   Also, another thing I should have mentioned: I can access the system
from the outside. i.e: When I logged in via the internal network, and
then checked the newly assigned ip, I could use that ip to login via the
public network.

   Am I correct in assuming that if the computer really was blocked (as
in the isp only allowing a certain mac address), this wouldn't be possibl=

> With one addition, this theory explains everything you've described.
> That addition is the postulation that the cablemodem box itself is
> responsible for answering at your "default router" address, and
> whatever answers pings there is *not* so limited - but whatever handles=

> passing packets upstream to the cable head end *is*.

   Hmm... Interresting. So it could be the router/cable modem that's
answering the ping? I guess that makes sense. (Again, I remind you that
I know _nothing_ about networking).

Kind Regards,
Jan Danielsson
Te audire non possum. Musa sapientum fixa est in aure.

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