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Date:	Sun, 7 Jul 2002 21:38:32 PST7
From:	Sheridan George <s-geo@usa.net >
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: ISP Side IPTrace

Content Type: text/plain

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Steven Levine wrote:
>
> In <3D288FC2.E6A4AEF0@usa.net>, on 07/07/02
> at 11:00 AM, Sheridan George said:
>
> >Would that setup be as simple a connecting a plain 4-port hub between the
> >cable modem and router with a third port going to another computer or
> >does it mean I must dust off my old InJoy 486 and substitute it for the
> >router?
>
> A hub will give you the electrical connection, but not neccessarily the
> logical connection. Recall that normally a NIC only sees packets
> addressed to it, unless its run in promiscous mode, as would be the case
> if was pressed into duty as part of a LAN analyzer. So even your 486
> might take some tweaking to capture all packets.

That seems time consuming and a lot of trouble since I just discovered my "need to know" clearance has
lapsed. Thanks for the info.
>
> Just wondering. Did you have to tell the router the IP address of the
> modem? I'm still not entirely clear on who does what in a modem/router
> setup.

With Comcast I had a static IP address and I had to point the router to the modem. Adelphia uses DHCP
so I turned on the router's DHCP switch and bingo, bango the modem, gateway, and DNS addresses were
all there. No manual entry as with Comcast.

Furthermore, with Comcast I had to manually type in the router address, the Comcast's domain name, and
DNS addresses at each computer. I didn't have to do that with Adelphia. All I did at each computer
was type in the router's address. (The reason may be that I might have gone to DHCP on my side at the
same time.)

Sheridan

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