Subject: Re: Question about IP-NAT
To: Bill Studenmund <wrstuden@loki.stanford.edu>
From: Henry B. Hotz <hotz@jpl.nasa.gov>
List: port-mac68k
Date: 02/19/1998 19:15:41
At 12:53 PM -0800 2/19/98, Bill Studenmund wrote:
>On Thu, 19 Feb 1998, Colin Wood wrote:
>
>> Do you have "options 	GATEWAY" in your kernel config?  (I think that
>> GENERIC does, but I'm not sure).  Generally, I hardwire my gateway address
>> and netmask in the OT configuration dialog since I know that they are not
>> going to change.  Is pppd capable of sending routing and netmask info in
>> and of itself?
>
>Uhm, since PPP is a point2point protocol, shouldn't the netmask always be
>255.255.255.255?
>
This is starting to deviate a bit from the original thread, but:

Point to point just means the physical connection only goes to one other
machine.  In other words it's not Ethernet where what goes out the
interface goes to lots of physical machines at once.

It's not unreasonable to expect a ppp link to serve an entire subnet with a
netmask of e.g. 255.255.255.0.  Something like this is exactly what you
would do if you could instead of using IPNAT.  Most inter-router links are
PPP links.

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