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Re: ADSL and Linux router?

Ted Powell
Tue, 6 Oct 1998 11:10:04 -0700

On Tue, Oct 06, 1998 at 10:55:23AM -0700, Curt Sampson wrote:
> On Tue, 6 Oct 1998, Ted Powell wrote:
>
> > I had always thought--perhaps mistakenly--that masquerading was a
> > special case of NAT, where all the source addresses of outgoing packets
> > were set specifically to the address of the host doing the deed.
> >
> > Am I incorrect in thinking that NAT can do arbitrary translations?
>
> NAT indeed can: with ipfilter in NetBSD, for example, you can
> translate to a range of addresses:
>
> map ppp0 10.0.0.0/8 -> 209.123.45.0/24
>
> However, I've never heard the term `masquerading' to refer to doing
> a translation to only one address. In fact I've never seen the term
> `masquerading' at all outside of the Linux community. I'm open to
> counter-examples, however.

Perhaps no-one previously perceived a need for a single word to refer to
this special case. Do other people refer to this case as "restricted
NAT", "one source address NAT", "NAT-1", or what?

If implementation of this special case of NAT has only occurred within
the Linux community, then it's not surprising that a word to refer to it
only exists there. If it has occurred elsewhere, then what word or
phrase is used to refer to it in a way that would not be confused with
fully-implemented NAT?

-- 



http://psg.com/~ted/ (Ted Powell) If your hard drive crashes, perhaps you have a recent backup. If Earth crashes, what then? We need off-site backup: Luna, L5, Mars, wherever.