On Tue, Apr 22, 2008 at 3:23 PM, Alain Totouom <alain.totouom at gmx.de> wrote:
> Hi,
>
>
> Helmut Wolf wrote:
> > Hi Benny,
> >
> > In RFC 3489 the situation is not described if we got no response from the alternate server. I think this is a special network
> > configuration I have tested :-)
> >
>
> IMHO this assertion is not correct.
> In such a case you might have 3 possible NAT types
> - a port restricted (Test #1 & #3)
> - a restricted (Test #1 & #3)
> - or a symmetric NAT (Test #1)
>
> depending on one (Test#1) or two (Test #1 & #3) additional tests you'll have to
> perform after Test#2 has failed. Please check rfc.3489 page 21 for clarity.
>
This may not be possible since test 1B failed with no response.
Perhaps at best what we can do is something like this:
if (test 1B failed with no response) {
if (test 3 is successful)
Type=Restricted;
else
Type=unknown (can't distinguish between Port Rest. and Symmetric).
}
What do you think?
Cheers
Benny
