Date: Thu, 17 Sep 1998 23:58:39 -0400 From: Harlan Stenn <Harlan.Stenn@pfcs.com> To: questions@FreeBSD.ORG Subject: NATD gateway with Com21 cable modem+phone modem uplink? Message-ID: <5641.906091119@brown.pfcs.com>
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Has anybody gotten a cable/phone modem combination to work with FreeBSD?
The cable modem is from Com21, and the cable company can barely understand
the Win/{95,NT} that they support.
They *sure* don't support/understand anything else.
I suspect (and may find out) that the uplink is standard PPP. At least,
they didn't give me anything with a special IP driver in it...
The cable modem is expecting to talk to 10.0.0.1 .
I'd *love* to be able to run this with NATD on a FreeBSD box, so the rest
of my network can use this way to get data from the InterNet.
For this to work, however, I suspect I'm going to be dealing with
asymmetric routing out of the box:
a "local network" NIC card
a NIC card for the cable modem ( I suspect I could use an IP alias and a
single NIC card, but why take the security risk?) at 10.0.0.1
a PPP tunnel (with whatever IP address the cable company tells me it will
be, that will probably end up being my default route to the internet)
Here's where I have my doubts about NATD - the incoming translation will
need to be on the local NIC stuff, and while outgoing packets will be
headed over the PPP connection, the returning packets will have a
destination IP address of 10.0.0.1. Is NATD smart enough to handle this?
H
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