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Date:	Mon, 8 Jul 2002 06:16:30 PST7
From:	Steve Schiffman <schiffman@attglobal.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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> In <3D27DE83.9A5F4E36@usa.net>, on 07/06/02
> at 10:24 PM, Sheridan George said:
>
>As a matter of academic interest I would like to know how to do an
>IPTrace on the traffic between my SMC firewall and my ISP.

Steven Levine wrote:
>
> You probably can't without some work. If the connection between the modem
> and the router is standard ethernet, you could stuff a gateway computer
> between them. Then you can do all the IPTracing you like.

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?

The SMC is a low end router and does not have tracing capability. Yes
you can use that 486 configured with two network cards to capture the IP
traffic. You set it up between the cable modem and the SMC
Gateway/Router. No hub is needed. You need to do a bit of fiddling with
the IP addresses/DHCP settings, enable IP forwarding, make a change to
the SMC configuration and you will be able to capture the IP traffic.

Come to the Network SIG on Sunday, July 14th. Chapman University, City
of Orange, 2pm room 203 in the Science building. Bring the 486 (with
OS/2 installed) and I will help you setup the configuration needed.

Steve Schiffman

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