Re: [NSIS] Legacy NAT traversal for NSIS

[Saikat Guha <[e-mail]>]

Hi Andreas,

On Mon, 2006-06-19 at 15:22 +0200, Pashalidis, Andreas wrote:
> Is anyone interested to make NSIS work through legacy NATs ?? (i.e.
> NSIS-unaware NATs)
> 
> Under the following link a preliminary document (in I-D format) can be
> found that describes a solution approach.
> http://www.tschofenig.priv.at/TEMP/draft-pashalidis-nsis-gist-legacynats-00.
> txt
> 
> In an exremely small nutshell: the idea is to tunnel both signalling and
> data traffic over a single UDP NAT binding.

I haven't gone through the document throughly, but the underlying
transport you propose reminds me of TEREDO (which is <any transport>
over IPv6 over UDP over IPv4, where the UDP over IPv4 is punched through
legacy NATs with the help of STUN/TURN/ICE etc.) One could potentially
run GIST over TEREDO and keep the signaling and data channel separate in
IPv6 land even though they use the same NAT binding in IPv4 land.

Alternatively, TURN (public-data-relay protocol for traversing the worst
of NATs) now has some lightweight framing capability; the framing in
TURN could potentially be extended to carry any in-band signals
including GIST. 

-- 
Saikat

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