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Date:      Tue, 15 Dec 1998 21:21:09 -0600
From:      David Kelly <dkelly@hiwaay.net>
To:        "Parker, David K" <dparker@ci.bryan.tx.us>
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: FreeBSD & CableModem 
Message-ID:  <199812160321.VAA69947@n4hhe.ampr.org>
In-Reply-To: Message from "Parker, David K" <dparker@ci.bryan.tx.us>  of "Tue, 15 Dec 1998 12:14:52 CST." <6C94DFBFD20ED211A8E3006097A1760F02A136@xs.ci.bryan.tx.us> 

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"Parker, David K" writes:
> I hope I'm posting this to the correct list...
> I have a PC setup with FreeBSD version 3.0. 
> My problem is with the TCP/IP Configuration and CableModem.
> 
> If I place the PC on my internal network using an IP Address/SM/GW for a
> Class C network, it works fine. I can resolve other host names, ping, etc...
> 
> When I configure for our ISP using a cablemodem I have no such luck. Here is
> the IP info...
> IP:	208.162.121.228
> SM:	255.255.254.0
> GW:	208.162.120.1
> 
> I can ping the loopback and 208.162.121.228 but nothing else.
> This same configuration works fine when I use an NT Box.

You are running FreeBSD and NT different systems, right? I have been
told that most cable modem boxes have a very limited IP protocol stack
and are not intended to be placed on a multihost ethernet. After reset
they grab the first hardware ethernet address and lock on to it. And
will not talk to any other host until the next reset. If this is the
case then your cable modem locked onto the NT box. Make a direct
connection to your FreeBSD system from the cable modem. Then power cycle
the cable modem. See if that works.

Based on your discription I'd guess you are plugging your cable modem
into a hub? Probably the Right Thing To Do would be to put two ethernet
cards in your FreeBSD system and let FreeBSD be a NAT gateway and
firewall for your other systems.

--
David Kelly N4HHE, dkelly@nospam.hiwaay.net
=====================================================================
The human mind ordinarily operates at only ten percent of its
capacity -- the rest is overhead for the operating system.



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