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Date:      Thu, 14 May 1998 05:14:17 +0200
From:      Eivind Eklund <eivind@yes.no>
To:        Terry Lambert <tlambert@primenet.com>
Cc:        brian@awfulhak.org, freebsd-hackers@FreeBSD.ORG
Subject:   Re: why /var/log/ppp.log
Message-ID:  <19980514051417.25127@follo.net>
In-Reply-To: <199805140251.TAA03936@usr08.primenet.com>; from Terry Lambert on Thu, May 14, 1998 at 02:51:14AM %2B0000
References:  <19980514001550.53205@follo.net> <199805140251.TAA03936@usr08.primenet.com>

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On Thu, May 14, 1998 at 02:51:14AM +0000, Terry Lambert wrote:
> > > Hey, speaking of names, how about renaming (over time) the rather
> > > ill-named -alias flag to -nat? :-)
> > 
> > Possibly a good idea, due to the general confusion over terminology.
> > Aliasing is only a subset of the possible NAT forms.  The library
> > should definately have been named libnat, at least :-)
> 
> If you want to use the name it's called in the RFC's, you should
> use the term "transparent proxy" or just "proxy" for short.

'Transparent proxy' is not what we've got.  We've got NAT - see
RFC1631.  I hope we'll get transparent proxy support in libalias, but
it isn't too high on my list of priorities at the moment.

> The term "NAT" is generally meaningless, and doesn't imply some things
> that it should, while at the same time imply some things it shouldn't.
> It's too "fuzzy" to be truly meaningful.

I'm not sure I follow you - for me, NAT is a very specific technology:
Translating packets in transit to do manipulation of the address space.

Transparent proxy, on the other hand, is a technology that re-assemble
a stream (the easiest way of getting correct results for
FTP/IRC(/CVSup?)) and then do a separate connection for that stream.


I can see the reasons for letting the definition for 'transparent
proxy' flow to include the 'alias-to-single-address' versions of NAT
(because it gives the exact same results if done properly), but I
can't see how 'NAT' is fuzzy.  Help me?

Eivind.


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