BCP38 tester?

Mon Apr 1 16:23:35 UTC 2013

----- Original Message -----
> From: "Karl Auer" <kauer at biplane.com.au>

> On Sun, 2013-03-31 at 22:32 -0400, Jay Ashworth wrote:
> > This thought crossed my mind earlier today, when I asked Jeff if
> > IP-forged
> > packets would make it through a NAT, outbound. He said no (I think),
> > but
> > I'm not entirely sure that's right.
> 
> Welll - the packets might make it out, and be transmitted into the
> Internet, but they would have a legitimate source address, namely an
> outside address of the NAT router. A side effect of NAT is to clamp the
> source address range of outbound packets to the configured NAT outside
> address range.

D'oh.  Of course.

Hmmm.  That says things about the penetration of NAT routers at consumer
eyeball connections vs. directly connected PCs that surprise me.

Cheers,
-- jra
-- 
Jay R. Ashworth                  Baylink                       jra at baylink.com
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates     http://baylink.pitas.com         2000 Land Rover DII
St Petersburg FL USA               #natog                      +1 727 647 1274