BCP38 tester?

Mon Apr 1 04:07:54 UTC 2013

In message <1364787851.2136.7.camel at karl>, Karl Auer writes:
> 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.
> 
> Regards, K.

It depends on how the nat is configured.

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org