Re: IP Address Conflict

Yes, I agree, that those devices use RFC 1918 addresses (what you term
"out of band", perhaps?) that don't route into the Internet. But,
this is routing 101. If the Linksys inside address is 192.168.100.1
and the same address is used on the Comcast router/modem, then you
can't access that Comcast modem from inside the Linksys network,
because the router has the same subnet and that local subnet traffic
won't pass to the Linksys WAN port. Therefore, the only way to
access that Comcast device is a workstation directly attached to it,
or attached to a switch that would sit "between" the Comcast device
and the Linksys WAN port. I've done it 100 times if I've done it
once. And, I see more network admins get burned by this principle
than almost any other principle.

Although I don't know the model of this Comcast Modem/Router, if it's
just a Surfboard like Russ predicts, there won't be any way to get to
it except to have a workstation directly connected or conntected to an
intermediate switch between the modem and router WAN port. (But,
there really isn't any reason to get to it, either) If it's more like
an integrated router, then there are port configurations that need to
be reviewed and deleted and maybe a firewall that needs to be
disabled, and again, requires either an intermediate switch, or
disconnection from the router WAN port and connection to a
workstation.

Good day!
-e-

On Jul 15, 5:25 pm, "Cliff Galiher" <cgali...@xxxxxxxxx> wrote:
Eric:

Actually it isn't uncommon for gateway devices to intentionally use
out-of-band addresses for administrative purposes.  They don't route outside
of the network and they keep a special route to make it accessible even when
it 'appears' it shouldn't be.  Just a heads up.  :)

-Cliff

"Eric Louie" <airw...@xxxxxxxxx> wrote in message

news:4796adb0-6bb2-46dc-9269-53be1b014d59@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi.

If your router has 192.168.100.1 as it's network address, you won't be
able to access that modem unless you
1)  change it's address to something outside that 192.168.100 network
2)  attach a switch between the modem and router WAN port and
physically attach a workstation to that switch

Your camera problem probably has something to do with port forwarding
configuration on your new Linksys router.  I'm guessing the camera
access is a web app, and that there were forwarded ports associated
with the IP addresses of those cameras in your old router
configuration.  The Comcast Modem/Router probably still has the
information in it for port forwarding, so you'll want to take a look
at that configuration, and all of the ports that were forwarded there
can be configured into the Linksys router.  There are probably port
25, port 443, port 444, and port 4125 configurations there, too.

Once you've retrieved those port forwarding configurations, you can
remove them from the Comcast Modem/Router, and re-enable the firewall
on the Linksys router.  You probably really want that Comcast Modem/
Router to stop blocking any traffic so that it alll flows smoothly
into the Linksys router.

Good luck!
-e-

On Jul 15, 8:32 am, moyondizvo <moyondi...@xxxxxxxxxxxxxxxxxxxxxxxxx>
wrote:



Strange as it may sound but this is actually happening. I can't ping my
server from outside but can connect to it via RWW. Before, I could access
my
Comcast Modem/Router by entering the local IP address 192.168.100.1 in the
web browser's address but am not able to do so now. If I type in my
external
gateway IP address, that takes me to the Modem/Router login window. I also
have security cameras installed on the server that I used to access
remotely
from outside. Now, I can only access the cameras from within the network
and
not from outside. I'm running SBS 2003 SP2 with Exchange 2003. Any idea
what may be causing this and how I can solve it as it's driving me up 50
walls? Any assistance will be greatly appreciated. Thanks in advance.- Hide quoted text -

- Show quoted text -

.

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