[LINK] There goes the neighbourhood...

[Karl Auer]

On Wed, 2011-05-11 at 10:57 +1000, rene wrote:
> Just curious about what is meant by "ubiquitous NAtting home router".

Virtually all home users and most business users are behind a NAT
router. Hence "ubiquitous".

> Am I correct in being under the impression that the NAT problem can be 
> solved, with any home router, if the person uses SIP client software 
> configured to use a stun server (or does that not work with some/many 
> routers)?

No, that'll work.

> Even if that method/solution does work with all home routers, it's imo no 
> doubt far too 'complicated' for the most users (at least unless they've 
> been lucky enough to have been told/heard about some SIP client that 
> installs pre-configured to use a publicly usable stun server - don't know 
> if there even still is any such client, but several years ago IIRC free 
> SJPhone did - *and* the people they want to communicate with have also).

Ekiga etc will do all this. The problem is STUN servers! You need them.
Skype solved the problem by distributing it, and essentially stealing
bandwidth and CPU from anyone running Skype on a public IP address. It
promotes these to "supernodes" and provides STUN-like services on them.

There's a good paper on it, though things may have moved on a bit since
2004:

   arxiv.org/pdf/cs/0412017

Regards, K.

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Karl Auer (kauer at biplane.com.au)                   +61-2-64957160 (h)
http://www.biplane.com.au/kauer/                   +61-428-957160 (mob)

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