New Zealand ADSL Mailing List


Re: pinholes

From: HAMISH MACEWAN <hamish_at_usa.net>
Date: 2 Jul 99 09:34:40 NZST
Message-ID: <19990701213440.24130.qmail@nwcst314.netaddress.usa.net>

"Dan Langille"<dan.langille@dvl-software.com> wrote:

> First off, I don't think you want a cross over cable here. Just a normal
cable
> will do. That's what I'm using. And I'm doing NAT.

I'm pretty, nay absolutely certain, that to connect ethernet back to back
requires a cross over, unless, there is one of those "cross-over" ports
available, or some real clever ports can adapt.

> The pinholes, from memory, are Lower-Port, Upper-Port, IP Address, Port. So
> you are mapping several ports to a *single* port. How does the box know
what
> protocol you are using? How does it distinguish telent (port 23) from ssh
(port
> 22) from mail (port 25)?

If that is the case, it won't work, (of course I wonder what the point of
folding a port range down to a single port is?), but if it maps one-to-one,
then of course, it will work, with the caveat about latencey.

> Dan Langille

Hamish.

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Received on Fri Jul 2 09:34:40 1999


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