Interesting, when you take the cable from the modem and connect, are you
trying the main PC first?
Note that they do usually keep track of the mac at the other end, so you'd
have to reboot the cable modem each time after you move the cable from one
PC to another for the others to work...so the first box should connect, but
the others won't b/c they don't have the mac address that the other end is
expecting....
So what happens if you do reboot the cable modem in b/w each time you
connect them to the modem? Can the other computers connect then? If not,
then it's definitely somehow cached the mac address of that PC (not sure how
myself) and you'd need mac masquerading to make it work. GL!
BINO
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Stan Zaske
Sent: Sunday, January 25, 2009 12:36 AM
To: [email protected]
Subject: Re: [H] Comcast blues
When I take the cable from the modem and connect it to each of my PC's
one after another only one (my main browser/email box) will connect to
the web. I have a D-Link router and I'm a novice at networking but I'll
get into the firmware and see if there's anything I can do to change the
MAC address. I've rebooted everything and looked into everything I can
think but I just don't understand why the other 3 boxes simply will not
connect. First time that's ever happened. And thanks for the reply.
Bino Gopal wrote:
> Probably already done, but have you tried rebooting everything?
>
> If you have, then if you have a router, this seems like a transient error
> rather than a change or anything; i.e. if you had a router in b/w the
cable
> modem and the PCs, the cable modem (and thus Comcast) would only see the
mac
> address of the router, so there's no obvious reason it should be requiring
> the mac address of one of the PCs (did you ever have that PC connected to
> the cable modem w/o the router in the past?)...
>
> So when you say the "cable modem will only connect one PC to the web and
> none of the others?" is that through the router or directly from the cable
> modem to the PC, i.e. putting the PC on a public IP? Could NAT have
somehow
> been disabled on your router? It's also possible that your router has
just
> died/broken; I had a Netgear do that to me a few years back...
>
> Oh ok, I see from your last sentence you've taken the cable modem and
> connected it directly to all your PCs (bypassing the router right?), but
> only one PC will connect when you do that; hmm, so I ask again, have you
> tried rebooting the cable modem (and everything else)?
>
> If so, and only that one PC can connect, assuming it's b/c it wants that
mac
> address, then you should be able to do mac masquerading on your router;
i.e.
> change the mac address on the WAN port to that of the PC that works, and
> then see if everything starts working again...that's the only other thing
I
> can think of at this point!
>
> Did any of that make sense? :P
>
> BINO
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Stan Zaske
> Sent: Saturday, January 24, 2009 6:51 PM
> To: [email protected]
> Subject: [H] Comcast blues
>
> Have any of you ever run into a situation where your router's WAN port
> seems to stop working but your ethernet connections among 4 PC's are
> fine? Then after some more investigation it seems that your cable modem
> will only connect one PC to the web and none of the others? The only
> thing I can figure is that my router is fine but Comcast has locked
> (possibly) my service to the MAC address of this one box and will only
> connect to it but none of the others. Is my thinking straight on this or
> can any of you come up with an alternate scenario? It seems might
> strange to me that I can take the ethernet cable from my Mororola cable
> modem and switch it from one box to another and only the one will
> connect. What the heck is going on?
>
>
>
>
>
