On Wed, Jul 8, 2015 at 6:57 PM Max Mertens <[email protected]> wrote:
> Hi Vicente, > Hello! > > Taking a few ideas from this paper [1], I added subtypes of the symmetric > NAT type depending on the public source port allocation (port preservation > (SYMPP), sequential port allocation (SYMSP), or random port allocation > (SYMRP)) to the documentation and the script. I added a result table below, > but have to recheck the values to be certain about the results (the table > is not symmetric, I marked the odd results in bold). > Please, refresh my memory: Which is the difference between Peer1 and Peer2? > This implementation of the symmetric NAT subtypes is to determine if the > (now following) NTS implementation for symmetric NATs works. > An algorithm I would suggest to the P2PSP protocol is to determine if the > NAT is a "port preserving symmetric NAT", i.e. the public source port is > the same as the source port of the local host behind the NAT (which can > easily be determined). > Then the only case where a connection cannot be established would be with > two symmetric NATs with random port allocation, or with sequential > allocation and a "port stepsize" greater than 1 (which seems not supported > by the P2PSP algorithms). > That's right. Well, however, if we are able to determine the port allocation scheme used by a NAT, do you think that we could traverse it? Regards, Vi. > -- -- Vicente González Ruiz Depto de Informática Escuela Técnica Superior de Ingeniería Universidad de Almería Carretera Sacramento S/N 04120, La Cañada de San Urbano Almería, España e-mail: [email protected] http://www.ual.es/~vruiz tel: +34 950 015711 fax: +34 950 015486
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